CAP Exam Dumps - Certified AppSec Practitioner Exam

Insecure Deserialization occurs when untrusted data is deserialized by an application, allowing attackers to execute arbitrary code, manipulate objects, or cause denial-of-service. If user input is not validated or sanitized, many languages and frameworks are vulnerable to this issue because deserialization often involves reconstructing objects from serialized data, which can include malicious payloads.

Option A (".NET"): .NET applications (e.g., using BinaryFormatter or XmlSerializer) areprone to Insecure Deserialization if untrusted data is deserialized without validation. For example, BinaryFormatter can execute arbitrary code during deserialization, a well-known vulnerability (e.g., CVE-2017-11882).

Option B ("Java"): Java’s ObjectInputStream is notoriously vulnerable to Insecure Deserialization. Libraries like java.io.Serializable can execute code during deserialization of untrusted data, as seen in vulnerabilities like Apache Commons Collections (CVE-2015-7501).

Option C ("PHP"): PHP applications using functions like unserialize() are vulnerable if they deserialize untrusted input. For example, an attacker can craft a serialized object to trigger a gadget chain, leading to remote code execution (e.g., CVE-2016-7124).

Option D ("All of the above"): Correct, as .NET, Java, and PHP all have deserialization mechanisms that, if not properly secured, can lead to Insecure Deserialization vulnerabilities when handling untrusted input.

The correct answer is D, aligning with the CAP syllabus under "Insecure Deserialization" and "OWASP Top 10 (A08:2021 - Software and Data Integrity Failures)."References: SecOps Group CAP Documents - "Insecure Deserialization," "Serialization Security," and "OWASP Deserialization Cheat Sheet" sections.

The HTTP request is a GET to /help.php with a parameter file=../../../etc/passwd. Let’s analyze the vulnerability:

The file parameter includes ../ sequences, which are used to navigate up the directory structure (.. moves up one directory level). The request attempts to access /etc/passwd, a sensitive system file on Linux servers that contains user information.

This is indicative of aPath Traversal Vulnerability(also known as Directory Traversal), where an attacker manipulates file paths to access unauthorized files outside the intended directory. If the server does not sanitize or restrict the file parameter, it may serve the contents of /etc/passwd, leading to sensitive information disclosure.

Option A ("Cross-Site Request Forgery Vulnerability"): CSRF involves tricking a user into making an unintended request, typically via a malicious form or link. This request does not indicate CSRF; it’s a direct attempt to manipulate file access, so this is incorrect.

Option B ("Path Traversal Vulnerability"): As explained, the ../ sequences in the file parameter are a clear attempt at path traversal, making this the correct answer.

Option C ("Code Injection Vulnerability"): Code injection involves executing malicious code (e.g., PHP, SQL), but this request aims to read a file, not execute code, so this is incorrect.

Option D ("All of the above"): Since only Path Traversal applies, this is incorrect.

The correct answer is B, aligning with the CAP syllabus under "Path Traversal" and "OWASP Top 10 (A05:2021 - Security Misconfiguration)."References: SecOps Group CAP Documents - "Path Traversal Attacks," "Input Validation," and "OWASP Secure Coding Practices" sections.

The code snippet loads a JavaScript file from a third-party CDN with integrity and crossorigin attributes. Let’s analyze what these attributes do:

The integrity attribute specifies a Subresource Integrity (SRI) hash (e.g., sha384-Fmb0CYeA6gM2uLuyvqs7x75u0mktDh2nKLomp3PHkJ0b5vJF2qF6Gbrc/6dK), which the browser uses to verify the integrity of the loaded script. If the script’s content does not match the hash, the browser will not execute it, protecting against tampering (e.g., if the CDN is compromised).

The crossorigin="anonymous" attribute ensures the request does not send credentials (e.g., cookies) and allows the script to be loaded from a different origin while enabling CORS (Cross-Origin Resource Sharing).

Option A ("The code snippet will perform validations for Cross-Site Scriptingattacks"): Incorrect. XSS (Cross-Site Scripting) involves injecting malicious scripts into a page. The integrity attribute ensures the script’s integrity but does not validate the script’s content for XSS vulnerabilities (e.g., if the script itself contains malicious code). XSS prevention requires other measures, like Content Security Policy (CSP) or input sanitization.

Option B ("The code snippet will perform validations for Cross-Site Request Forgery attacks"): Incorrect. CSRF (Cross-Site Request Forgery) involves tricking a user into making unintended requests. The integrity and crossorigin attributes do not address CSRF, which requires server-side protections like CSRF tokens.

Option C ("The code snippet will perform Subresource Integrity (SRI) checks"): Correct. The integrity attribute explicitly enables SRI, ensuring the browser verifies the script’s hash before execution. This protects against supply chain attacks where a third-party script might be modified maliciously.

Option D ("The code snippet will perform validations for Outdated Javascript checks"): Incorrect. The snippet does not check for outdated JavaScript versions. SRI ensures the script matches the expected hash but does not validate the script’s version or security status.

The correct answer is C, aligning with the CAP syllabus under "Subresource Integrity (SRI)" and "Third-Party Script Security."References: SecOps Group CAP Documents - "SRI Implementation," "Third-Party Resource Security," and "OWASP Secure Coding Practices" sections.

SQL injection vulnerabilities allow attackers to manipulate database queries, potentially accessing unauthorized data, including file contents, if the database supports such operations. In MySQL, theLOAD_FILE()function is specifically designed to read the contents of a file on the server where the database is hosted, provided the file exists, the database user has appropriate privileges (e.g., FILE privilege), and the file is readable. For example, SELECT LOAD_FILE('/etc/passwd') could extract the contents of the /etc/passwd file if exploitable.

Option A ("READ_FILE()"): This is not a valid MySQL function.

Option B ("LOAD_FILE()"): This is the correct function for reading file contents in MySQL, making it the right choice for exploitation.

Option C ("FETCH_FILE()"): This is not a recognized MySQL function.

Option D ("GET_FILE()"): This is also not a valid MySQL function.

The correct answer is B, aligning with the CAP syllabus under "SQL Injection" and "Database Security."References: SecOps Group CAP Documents - "Injection Vulnerabilities," "MySQL Security Features," and "OWASP Top 10 (A03:2021 - Injection)" sections.

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.SSLv2andSSLv3are 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,TLSv1.0andTLSv1.1are 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).TLSv1.2andTLSv1.3are 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.References: SecOps Group CAP Documents - "Secure Communication," "SSL/TLS Configuration," and "OWASP Secure Headers" sections.

The screenshot shows a login form where the user coder@viewer attempts to log in, and the application responds with "User does not exist." Let’s evaluate the statements:

Option A ("The application is vulnerable to username enumeration"): Correct. Username enumeration occurs when an application reveals whether a username exists in the system, often through distinct error messages. Here, the message "User does not exist" for coder@viewer directly indicates that the username is invalid, allowing an attacker to enumerate valid usernames by testing different inputs and observing the responses (e.g., "Invalid password" for existing users vs. "User does not exist"). Best practice is to use generic error messages like "Invalid username or password" to prevent enumeration.

Option B ("The application is vulnerable to brute-force attacks"): Incorrect. There’s no evidence in the screenshot of a lack of brute-force protections (e.g., rate limiting, account lockout). Brute-force vulnerability would require additional context, such as no CAPTCHA or no lockout mechanism, which is not shown.

Option C ("The application does not enforce a strong password policy"): Incorrect. The screenshot does not provide information about password requirements (e.g., length, complexity), so we cannot conclude whether a strong password policy is enforced.

Option D ("None of the above"): Incorrect, as A is true.

The correct answer is A, aligning with the CAP syllabus under "Username Enumeration" and "Authentication Security."References: SecOps Group CAP Documents - "Authentication Best Practices," "Enumeration Attacks," and "OWASP Authentication Cheat Sheet" sections.

The scenario describes a vulnerability where a user can manipulate the order_id parameter in theURL (e.g., https://example.com/?order_id=53870) to access other users’ order details, indicating a lack of proper access control. This is a classic case of an Insecure Direct Object Reference (IDOR)attack. IDOR occurs when an application exposes a reference to an internal object (e.g., an order ID) that can be manipulated by an unauthorized user to access resources they should not have access to, without validating the user’s permissions.

Option A ("Insecure Direct Object Reference"): Correct, as the ability to change order_id to view arbitrary orders fits the definition of IDOR.

Option B ("Session Poisoning"): Incorrect, as session poisoning involves corrupting or altering a user’s session data, which is not indicated here.

Option C ("Session Riding OR Cross-Site Request Forgery"): Incorrect, as CSRF involves tricking a user into submitting a request (e.g., via a malicious form), not manipulating a URL parameter directly.

Option D ("Server-Side Request Forgery"): Incorrect, as SSRF involves tricking the server into making unauthorized requests to internal or external resources, which is not the case here.

The correct answer is A, aligning with the CAP syllabus under "Insecure Direct Object References (IDOR)" and "OWASP Top 10 (A04:2021 - Insecure Design)."References: SecOps Group CAP Documents - "IDOR Vulnerabilities," "Access Control," and "OWASP Testing Guide" sections.

The code snippet shows HTML and tags, along with a