Buffer Overflow vs SQL Injection Attack Analysis
Short answer
B This is a buffer overflow attack because the code attempts to write to an array index (10) that exceeds the allocated buffer size (0-9), leading to memory corruption rather than database manipulation.
Question
Key Takeaways
The core concept tested is memory management vulnerabilities, with the common trap being the misidentification of out-of-bounds array access as an SQL injection attempt due to the presence of code-like syntax.
This question tests the ability to distinguish between buffer overflow and SQL injection attacks by analyzing a code snippet involving array index access. It establishes that writing beyond allocated memory boundaries constitutes a buffer overflow, not a database query manipulation.
Common mistake: Many learners incorrectly select SQL injection (A) because they see code or strings that look like data, failing to recognize that the specific action of accessing index 10 in a 10-element array (0-9) is a memory corruption issue, not a database query issue.
Expert Analysis
Why the Answer Is Correct
The correct answer is B (Buffer Overflow). The image likely depicts a code snippet where an array or buffer of size 10 (indices 0-9) is being accessed at index 10 (e.g., buff[10] = value). This action writes data beyond the allocated memory boundary, overwriting adjacent memory locations. This is the definition of a buffer overflow vulnerability, which can lead to crashes, data corruption, or arbitrary code execution.
Why the Other Options Are Wrong
SQL injection (A) involves inserting malicious SQL statements into input fields to manipulate a backend database; it does not involve direct memory access errors in application code. Cross-Site Request Forgery (C) is an attack that forces an end user to execute unwanted actions on a trusted web application, unrelated to memory bounds. Cross-Site Scripting (D) involves injecting client-side scripts into web pages viewed by other users, also unrelated to server-side memory allocation errors.
Community Comment Notes
Community consensus strongly supports Buffer Overflow. As Osanyindoro noted, "Writing to buff[10] attempts to access memory beyond the allocated buffer size," correctly identifying the out-of-bounds access. Another commenter, nicejob, emphasized that "it not possible is sqli," highlighting the distinction between memory errors and database queries. Booict initially considered SQL injection but corrected themselves, confirming the buffer overflow nature upon closer inspection of the indices.
Exam Strategy
When analyzing attack scenarios, always look for keywords related to memory management (buffer, stack, heap, overflow, crash) versus database interactions (SQL, query, UNION, SELECT). If the exploit involves exceeding array limits or pointer arithmetic, it is a buffer overflow, not SQL injection.
Frequently Asked Questions
Why is this not SQL injection if it looks like code?
How do I identify buffer overflow in exam questions?
Community Votes
80% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 4 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 4
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Osanyindoro 👍 2 Answered BThe answer is B (buffer overflow) Reasons: The buffer buff is defined to hold 10 elements (indices 0 through 9). Writing to buff[10] attempts to access memory beyond the allocated buffer size. This can lead to overwriting adjacent memory, potentially corrupting data, crashing the application, or enabling the execution of malicious code.
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Booict 👍 1 Answered ASQL injection attack involves inserting malicious SQL code into a web application's input fields to manipulate the database
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Booict 👍 1 Answered Bthe answer is B and not A. Ignore my previous answer
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nicejob 👍 1 Answered Bbuffer overflow, it not possible is sqli
Reader comments & corrections
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