CVE-2025-40907 - CVE House
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Status published Unknown CVE-2025-40907

FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Synacktiv

References

More from ETHER

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CVE-2025-40920
Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl use insecurely generated nonces
Unknown 0
CVE-2009-10007
Catalyst::Plugin::Authentication versions before 0.10_027 for Perl is susceptible to session fixation attacks
Unknown 0

Affected Vendor

Affected Software

FCGI
Vulnerable Versions:
0.44

Timeline

Official Publish: May 16th, 2025
Last Modified: September 5th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

CWE-1395 CWE-190 CWE-122

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control
T1499 Endpoint Denial of Service
Impact
T1203 Exploitation for Client Execution
Execution