New Release 312-50v13 CEH v13 Questions

If a system stores passwords in weak or reversible formats, attackers can perform offline cracking. CEH emphasizes dictionary attacks as the fastest and most efficient method to exploit weak hashing practices. This avoids detection and leverages known password patterns to recover plaintext credentials.

CEH covers advanced cryptanalytic attacks, including Meet-in-the-Middle (MITM) attacks, which are especially effective against multi-round symmetric encryption schemes. When an algorithm encrypts data twice using different keys, the naive brute-force method would require testing every possible combination of both keys—a time complexity of 2ⁿ × 2ⁿ. Meet-in-the-Middle dramatically reduces this complexity by splitting the problem in half. Attackers encrypt the plaintext using all potential values of the first key and store the results. They then decrypt the final ciphertext using all possible values of the second key. When an intermediate value matches one in storage, the corresponding key pair is identified. CEH highlights that this approach exploits the lack of key independence between two encryption layers, demonstrating how doubling encryption does not always double security. This attack is well-known for targeting 2DES, one of the historical examples covered in CEH. It is not related to side-channel attacks, brute-force flooding, or permutation reversal; it strictly relies on midpoint matching to reduce computational workload.

CEH v13 explains that reflected XSS occurs when malicious input supplied by an attacker is immediately returned in the HTTP response without sanitization. This type of XSS is typically exploited through a crafted URL containing embedded JavaScript payloads. When a victim clicks the link, the vulnerable server reflects the injected script back to the browser, executing it within the user’s session context. CEH emphasizes that reflected XSS relies on social engineering to deliver the payload, often via links sent through email, messaging platforms, or compromised pages. The goal may include stealing session cookies, redirecting users, or manipulating page content. Brute-forcing credentials (Option A) has no relation to XSS. SQL injection (Option C) targets backend databases, not client-side script execution. Directory traversal (Option D) concerns file path manipulation, not dynamic script injection. Therefore, embedding a malicious script in a URL is the correct method to exploit reflected XSS.

CEH v13 highlights that encrypting session data in transit is one of the strongest defenses against session hijacking. IPsec VPN encrypts the entire IP packet, preventing attackers from capturing usable session tokens.

IPS helps detection but not prevention. Physical security and awareness do not address technical hijacking.

Therefore, Option A is correct.