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.
References (6)
Core 6
Core References
Mailing List, Third Party Advisory mailing-list
http://www.openwall.com/lists/oss-security/2025/04/23/4
Exploit, Issue Tracking issue-tracking
https://github.com/FastCGI-Archives/fcgi2/issues/67
Release Notes patch
https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5
Exploit, Third Party Advisory technical-description
https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library
Exploit, Issue Tracking issue-tracking
https://github.com/perl-catalyst/FCGI/issues/14
Scores
CVSS v3
5.3
EPSS
0.0076
EPSS Percentile
73.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-190
CWE-122
Status
published
Products (1)
fastcgi/fcgi
0.44 - 0.82
Published
May 16, 2025
Tracked Since
Feb 18, 2026