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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

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
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

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