ECCouncil Updated 312-50v13 Exam Questions and Answers by sid

The correct answer is C, Bollards. Bollards are physical security controls designed to prevent vehicles from entering restricted areas or crashing into buildings, entrances, sensitive facilities, or pedestrian zones. They are commonly installed outside government buildings, data centers, banks, airports, and other critical infrastructure locations to mitigate vehicle-borne threats and unauthorized vehicle access. Depending on the security requirement, bollards may be fixed, removable, retractable, or reinforced to withstand high-impact collisions.

In CEH physical security concepts, organizations use preventive physical controls to protect personnel, equipment, and facilities from unauthorized access and physical attacks. Bollards are considered perimeter security controls because they create a physical barrier between vehicles and protected assets. A receptionist provides administrative access control but cannot physically stop a vehicle. A mantrap is an access-control vestibule used to restrict and verify personnel entry. A turnstile controls pedestrian movement and helps prevent tailgating. Since the question specifically asks about stopping vehicles from crashing through building doors, bollards are the most appropriate and effective security feature.

Answer: C

The correct answer is B. Blind Hijacking because the scenario describes injecting crafted TCP packets into an active client–server session to disrupt the legitimate client and take over the connection, without requiring the attacker to see (or fully rely on seeing) the server’s responses. In CEH-aligned session hijacking classifications, blind hijacking is an active takeover technique at the TCP/session layer where the attacker forges packets (often with predicted or inferred TCP sequence numbers) to insert data into an existing session and potentially desynchronize the legitimate endpoints. By injecting traffic that causes instability (for example, triggering retransmissions, resets, or sequence/ack mismatch), the attacker can effectively push the victim out of sync or off the session while continuing to communicate with the server as if they were the client.

The key clue is that Sarah “injects crafted TCP packets” into an “active communication,” and then the “victim’s connection becomes unstable,” after which Sarah’s system “maintain[s] communication with the server in place of the legitimate client.” This aligns with blind hijacking concepts where the attacker does not simply observe (passive) but actively manipulates the TCP stream to seize control. The attacker’s goal is forced takeover of a live session, which often involves sequence prediction and packet injection to become the effective participant while the real client experiences disruption.

Why the other options are incorrect: Passive session hijacking is eavesdropping/monitoring traffic to capture session identifiers without altering the session; it does not involve injecting packets or destabilizing a connection. Man-in-the-Browser is a client-side attack (typically via malware in the browser) that manipulates transactions within the browser context; it is not a TCP packet injection technique. Active session hijacking is a broad category and is true at a high level, but the question asks for the type—and the specific technique described (TCP injection causing takeover) maps most directly to blind hijacking in CEH-style terminology.

Therefore, Sarah is demonstrating blind session hijacking.

The correct answer is C. Overwriting Data/Metadata.

The key clue is that the file contents could not be reconstructed because the physical sectors no longer contained recognizable fragments of the original material. Simple deletion removes file references from directory structures, but the underlying data may still remain recoverable until overwritten. Here, the original sector contents were replaced, which indicates overwriting.

Option A. Data Hiding in File System Structures is incorrect because the data was not hidden in alternate file system locations or metadata structures.

Option B. Data/File Deletion is incorrect because ordinary deletion would usually leave recoverable data remnants.

Option D. Artifact Wiping is broader and often refers to removing traces such as logs, history, temporary files, or forensic artifacts. The scenario specifically describes replacement of file-sector contents.

Therefore, the best answer is C. Overwriting Data/Metadata.

This question describes a classic example of Tautology-Based SQL Injection, a subcategory of SQL Injection attacks which fall under Web Application Hacking in the CEH curriculum.

In a tautology-based SQL injection, the attacker injects a SQL fragment that always evaluates to true, thus bypassing the authentication mechanism. The string ' C ' ll-T; — is a malformed variant, possibly meant to represent ' OR ' 1 ' = ' 1 ' ; --, which is one of the most basic and widely recognized tautology-based injection payloads. When injected into a vulnerable SQL query, this kind of input manipulates the WHERE clause of the query so that it always evaluates to true, regardless of the original conditions.

Here’s how it works:

If the SQL query is:

SELECT * FROM users WHERE username = ' $username ' AND password = ' $password ' ;

And the attacker inputs:

' OR ' 1 ' = ' 1 ' ; --

The query becomes:

SELECT * FROM users WHERE username = ' ' OR ' 1 ' = ' 1 ' ; -- ' AND password = ' ' ;

This results in the execution of:

SELECT * FROM users WHERE ' 1 ' = ' 1 ' ;

Which always evaluates to true, thereby bypassing authentication and allowing unauthorized access.

This method does not rely on error messages (Error-Based), timing delays (Time-Based Blind), or UNION statements (Union-Based). Its goal is to exploit logic within the query structure itself using boolean-based manipulation.

According to EC-Council ' s CEH v13 Module: Web Application Hacking, understanding tautology-based injection is critical because it ' s one of the most common ways attackers bypass login forms on poorly secured web applications.