CAP Exam Dumps : Certified AppSec Practitioner Exam

SQL Injection (SQLi) occurs when an attacker injects malicious SQL code into a query by manipulating user input (e.g., ' OR '1'='1'), allowing unauthorized data access or manipulation. Let’s evaluate the defenses:

Option A ("Using a Web Application Firewall (WAF)"): A WAF can detect and block SQL injection attempts by filtering malicious patterns (e.g., ' OR '1'='1'), but it is not the primary defense. WAFs can be bypassed with sophisticated attacks (e.g., encoded payloads), and they are a secondary layer, not a fix for the root cause in the application code.

Option B ("Prepared Statements with Parameterized Queries"): Correct. Prepared statements with parameterized queries separate SQL code from user input by using placeholders (e.g., ? in SELECT * FROM users WHERE username = ?). The database engine handles the input as data, not executable code, preventing SQL injection. This is the industry-standard primary defense (recommended by OWASP and NIST) because it addresses the root cause by ensuring user input cannot alter the query structure.

Option C ("Use of NoSQL Database"): Switching to a NoSQL database (e.g., MongoDB) does not inherently prevent injection vulnerabilities. NoSQL databases can still be vulnerable to injection (e.g., MongoDB’s $where operator), and SQL injection applies to relational databases. This is not a defense against SQLi.

Option D ("Blacklisting Single Quote Character (‘)"): Blacklisting specific characters (e.g., ') attempts to block known malicious input, but it is ineffective as a primary defense. Attackers can bypass blacklists using alternate encodings (e.g., %27 for '), comments (e.g., --), or other techniques. Blacklisting is reactive and prone to evasion, unlike prepared statements.

The correct answer is B, aligning with the CAP syllabus under "SQL Injection Prevention" and "OWASP Top 10 (A03:2021 - Injection)."References: SecOps Group CAP Documents - "SQL Injection Defense," "Secure Coding Practices," and "OWASP SQL Injection Prevention Cheat Sheet" sections.

Symmetric key encryption algorithms use the same key for both encryption and decryption, while asymmetric algorithms use a pair of keys (public and private). Let’s evaluate the options:

Option A ("RC4"): RC4 is a symmetric key encryption algorithm. It is a stream cipher that uses a single key to both encrypt and decrypt data, though it is considered insecure due to known cryptographic weaknesses (e.g., biases in the keystream).

Option B ("AES"): AES (Advanced Encryption Standard) is a symmetric key encryption algorithm. It uses a single key (e.g., 128, 192, or 256 bits) for both encryption and decryption, widely regarded as secure when properly implemented.

Option C ("DES"): DES (Data Encryption Standard) is a symmetric key encryption algorithm. It uses a 56-bit key for both encryption and decryption, but it is now considered insecure due to its small key size and vulnerability to brute-force attacks.

Option D ("RSA"): RSA (Rivest-Shamir-Adleman) is an asymmetric key encryption algorithm. It uses a public key to encrypt and a private key to decrypt, making it an asymmetric algorithm, not a symmetric one.

The correct answer is D, as RSA is the only asymmetric algorithm listed, aligning with the CAP syllabus under "Cryptography Fundamentals" and "Symmetric vs. Asymmetric Encryption."References: SecOps Group CAP Documents - "Symmetric Encryption Algorithms," "Asymmetric Encryption," and "OWASP Cryptographic Storage Cheat Sheet" sections.

Cross-Site Request Forgery (CSRF) occurs when an attacker tricks a user’s browser into making an unintended request to a site where the user is authenticated, potentially performing actions like changing a password. Let’s analyze the request:

The request is a POST to /changepassword with a Cookie: JSESSIONID, indicating the user is authenticated via a session. The Content-Length: 95 and payload (new_password=lov3MyPiano23&confirm_password=lov3MyPiano23) suggest a state-changing operation (password change).

CSRF vulnerability arises when the request lacks a unique, unpredictable token to validate its legitimacy, and the server accepts it based solely on the session cookie. The request includes no CSRF token (e.g., in the body or headers like X-CSRF-Token).

The Sec-Fetch-Site: same-origin header indicates the request originates from the samedomain, but this is a browser feature and does not guarantee server-side protection against CSRF from a malicious site (e.g., via a hidden iframe or form submission).

Without a CSRF token, an attacker could craft a malicious HTML page with a form that submits this exact request when a victim visits their site while authenticated to example.com, exploiting the browser’s automatic inclusion of the JSESSIONID cookie. This is a textbook CSRF vulnerability.

Option A ("True"): Correct, as the request lacks a CSRF token, making it vulnerable to CSRF attacks.

Option B ("False"): Incorrect, as the absence of a CSRF token indicates vulnerability.

The correct answer is A, aligning with the CAP syllabus under "Cross-Site Request Forgery (CSRF)" and "Session Management."References: SecOps Group CAP Documents - "CSRF Prevention," "Session Security," and "OWASP CSRF Prevention Cheat Sheet" sections.