Summary: A critical vulnerability (CVE-2025-23016) in the FastCGI library poses a severe risk to embedded and IoT devices by enabling remote code execution through a heap buffer overflow. The flaw occurs due to an integer overflow in the parameter-parsing function, particularly affecting 32-bit systems. Immediate updates and configuration reviews are essential to mitigate the risks associated with this vulnerability.
Affected: FastCGI library versions < 2.4.5 (32-bit systems)
Keypoints :
- A critical flaw in FastCGI affects devices using 32-bit systems, risking remote code execution.
- An integer overflow leads to a heap buffer overflow, allowing attackers to overwrite function pointers and execute arbitrary code.
- Users should update to FastCGI library version 2.4.5 or later, restrict network access, and avoid exposing FastCGI ports directly.
Source: https://gbhackers.com/critical-fastcgi-library-flaw/