CVE-2025-40907

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-40907
FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library. The included FastCGI library is affected by CVE-2025-23016, causing an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
http://www.openwall.com/lists/oss-security/2025/04/23/4 Mailing List Third Party Advisory
https://github.com/FastCGI-Archives/fcgi2/issues/67 Exploit Issue Tracking
https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5 Release Notes
https://github.com/perl-catalyst/FCGI/issues/14 Exploit Issue Tracking
https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch Patch
https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:fastcgi:fcgi:*:*:*:*:*:perl:*:*
History

02 Jul 2025, 01:01

Type Values Removed Values Added
References () http://www.openwall.com/lists/oss-security/2025/04/23/4 - () http://www.openwall.com/lists/oss-security/2025/04/23/4 - Mailing List, Third Party Advisory
References () https://github.com/FastCGI-Archives/fcgi2/issues/67 - () https://github.com/FastCGI-Archives/fcgi2/issues/67 - Exploit, Issue Tracking
References () https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5 - () https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5 - Release Notes
References () https://github.com/perl-catalyst/FCGI/issues/14 - () https://github.com/perl-catalyst/FCGI/issues/14 - Exploit, Issue Tracking
References () https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch - () https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch - Patch
References () https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library - () https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library - Exploit, Third Party Advisory
First Time Fastcgi fcgi
Fastcgi
CPE cpe:2.3:a:fastcgi:fcgi:*:*:*:*:*:perl:*:*
CWE CWE-190
Summary
  • (es) Las versiones 0.44 a 0.82 de FCGI para Perl incluyen una versión vulnerable de la librería FastCGI fcgi2 (también conocida como fcgi). Esta librería está afectada por CVE-2025-23016, lo que provoca un desbordamiento de enteros (y el consiguiente desbordamiento del búfer en el montón) mediante valores nameLen o valueLen manipulados en los datos del socket IPC. Esto ocurre en ReadParams de fcgiapp.c.

16 May 2025, 16:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.3

16 May 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-16 13:15

Updated : 2025-07-02 01:01

NVD link : CVE-2025-40907

Mitre link : CVE-2025-40907

CVE.ORG link : CVE-2025-40907

JSON object : View

Products Affected

fastcgi

  • fcgi
CWE
CWE-190

Integer Overflow or Wraparound