CAP Exam Questions & Answers

Server-side attacks target vulnerabilities on the server, often involving code execution, data manipulation, or unauthorized access to server resources. Let's evaluate each option:

Option A ('OS Code Injection'): This is a server-side attack where an attacker injects operating system commands (e.g., via system() calls in PHP) to execute arbitrary code on the server, such as rm -rf /.

Option B ('Cross-Site Request Forgery'): CSRF is a client-side attack where an attacker tricks a user's browser into making an unintended request to a server where the user is authenticated (e.g., submitting a form to transfer funds). The attack exploits the client's trust in the user's session, not a server-side vulnerability. Thus, it is not a server-side attack.

Option C ('SQL Injection'): This is a server-side attack where an attacker injects malicious SQL code into a query (e.g., ' OR '1'='1) to manipulate the database, potentially extracting data or modifying records.

Option D ('Directory Traversal Attack'): This is a server-side attack where an attacker manipulates file paths (e.g., ../../etc/passwd) to access unauthorized files on the server outside the intended directory.

The correct answer is B, aligning with the CAP syllabus under 'Client-Side vs. Server-Side Attacks' and 'CSRF Prevention.'

SAML (Security Assertion Markup Language) is an open standard for exchanging authentication and authorization data between parties, particularly in the context of single sign-on (SSO). It is based on XML and is widely used to enable secure web-based authentication and authorization across different domains. The correct full form is Security Assertion Markup Language, where 'Assertion' refers to statements about a subject (e.g., identity, attributes), 'Markup' indicates the XML-based structure, and 'Language' denotes the defined syntax.

Option A ('Security Assertion Markup Language'): This is the correct and official full form of SAML as defined by OASIS (Organization for the Advancement of Structured Information Standards).

Option B ('Security Authorization Markup Language'): Incorrect, as 'Authorization' is not part of the acronym; SAML focuses on both authentication and authorization assertions.

Option C ('Security Assertion Management Language'): Incorrect, as 'Management' is not part of the acronym; SAML is about markup, not management.

Option D ('Secure Authentication Markup Language'): Incorrect, as 'Secure' is not part of the acronym, and SAML covers more than just authentication.

The correct answer is A, aligning with the CAP syllabus under 'Authentication and Authorization' and 'Single Sign-On (SSO) Standards.'

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols used to secure communication over a network. The security of these protocols has evolved over time, with older versions being deprecated due to identified vulnerabilities. SSLv2 and SSLv3 are considered insecure because they are vulnerable to attacks such as POODLE (Padding Oracle On Downgraded Legacy Encryption), which exploits weaknesses in their padding schemes. Similarly, TLSv1.0 and TLSv1.1 are also deemed insecure due to vulnerabilities like BEAST (Browser Exploit Against SSL/TLS) and weak cipher support, and they have been deprecated by modern standards (e.g., PCI DSS). TLSv1.2 and TLSv1.3 are considered secure when properly configured with strong ciphers.

Option A correctly identifies SSLv2 and SSLv3 as insecure, but it omits TLSv1.0 and TLSv1.1. Option B correctly identifies TLSv1.0 and TLSv1.1 as insecure but omits SSLv2 and SSLv3. Option C ('Both A and B') encompasses all insecure protocols (SSLv2, SSLv3, TLSv1.0, and TLSv1.1), making it the most comprehensive and correct answer. Option D is incorrect because it includes TLSv1.2 and TLSv1.3, which are secure when used with modern configurations. This aligns with the CAP syllabus focus on secure communication protocols and vulnerability management.

The request is a POST to /dashboard with a payload containing XML data, specifically an xml_foo parameter with a <!DOCTYPE> declaration and an XML entity (<!ENTITY example SYSTEM 'file:///etc/passwd'>). Let's analyze the vulnerability:

The payload defines an XML External Entity (XXE) with <!ENTITY example SYSTEM 'file:///etc/passwd'>, which instructs the XML parser to fetch the contents of /etc/passwd (a sensitive system file) and include it in the &example; reference. The XML then includes <foo>&example;</foo>, which would expand to the contents of /etc/passwd if the parser processes the entity.

This is a classic XML External Entity (XXE) Attack, where an attacker exploits an XML parser's ability to process external entities to access unauthorized resources (e.g., local files, internal network services) or cause denial-of-service. If the application's XML parser is misconfigured to allow external entity resolution, this attack can disclose sensitive data like /etc/passwd.

Option A ('Path Traversal Attack'): Incorrect. Path Traversal involves manipulating file paths (e.g., ../../etc/passwd) to access unauthorized files. While the attack aims to access /etc/passwd, it does so via XML entity resolution, not path traversal.

Option B ('Server Side Template Injection'): Incorrect. SSTI (Server-Side Template Injection) involves injecting template expressions (e.g., {{7*7}}) into a server-side template engine. The payload here is XML, not a template expression, and targets XML parsing, not a template engine.

Option C ('XML Bomb Attack'): Incorrect. An XML Bomb (or Billion Laughs attack) involves recursive entity expansion to cause denial-of-service (e.g., <!ENTITY a '&b;&b;'> <!ENTITY b 'lol'>), leading to exponential growth in memory usage. This payload defines a single external entity to fetch a file, not a recursive expansion, so it's not an XML Bomb.

Option D ('XML External Entity Attack'): Correct, as the payload exploits XXE by defining an external entity to access /etc/passwd.

The correct answer is D, aligning with the CAP syllabus under 'XML External Entity (XXE) Attacks' and 'OWASP Top 10 (A04:2021 - Insecure Design).'

The HTTP request is a POST to /changepassword with a session cookie (JSESSIONID) and parameters new_password and confirm_password. Let's evaluate each option:

Option A ('The change password feature does not validate the user'): The request includes a JSESSIONID cookie, which typically indicates that the user is authenticated via a session. There's no evidence that user validation is absent, so this is not correct.

Option B ('The change password feature uses basic authorization'): Basic authorization would involve an Authorization: Basic header with a Base64-encoded username and password, which is not present here. The authentication appears to be session-based (via cookie), not basic auth, so this is incorrect.

Option C ('The change password feature is vulnerable to Cross-Site Request Forgery attack'): Cross-Site Request Forgery (CSRF) occurs when a malicious site tricks a user's browser into making an unintended request to another site where the user is authenticated. This request lacks a CSRF token (e.g., a unique, unpredictable token in the request body or header) to verify the request's legitimacy. The Sec-Fetch-Site: same-origin header indicates the request is currently from the same origin, but this is a browser feature, not a server-side CSRF protection. Without a CSRF token, the endpoint is vulnerable to CSRF, as an attacker could craft a malicious form on another site to submit this request on behalf of the user. This is the correct answer.

Option D ('All of the above'): Since A and B are incorrect, D cannot be correct.

The correct answer is C, aligning with the CAP syllabus under 'Cross-Site Request Forgery (CSRF)' and 'OWASP Top 10 (A08:2021 - Software and Data Integrity Failures).'