An application security specialist is investigating a recurring system crash in a legacy network daemon written in C. Log analysis reveals that an attacker sent a single network packet containing a 2,048-byte payload field into a fixed 512-byte destination memory buffer, causing a segmentation fault and corrupting the instruction pointer. Which of the following vulnerabilities was exploited, and what is the most effective code-level mitigation?
- Buffer overflow; enforce strict input boundary checking and use safe memory handling functions.Cevap
- BBuffer overflow; deploy a perimeter network firewall rule to filter incoming IP traffic.
- CSQL injection; implement parameterized database queries and prepared statements.
- DBuffer overflow; require multi-factor authentication for all client connection handshakes.
Cevap
Buffer overflow vulnerability remediated by enforcing strict input boundary checking and safe memory handling functions.
The crash log demonstrates a classic buffer overflow where data exceeding the allocated memory size overwrites adjacent memory spaces, including the instruction pointer. The proper solution is ensuring strict input length validation and safe memory handling within the application source code.
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Anahtar Kavram
Buffer Overflow Remediation and Input Validation