CVE-2025-40907

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.

PUBLISHED Reserved 2025-04-16 | Published 2025-05-16 | Updated 2025-09-05 | Assigner CPANSec

Problem types

CWE-1395: Dependency on Vulnerable Third-Party Component

CWE-190 Integer Overflow or Wraparound

CWE-122 Heap-based Buffer Overflow

Product status

Credits

Synacktiv finder

References

www.openwall.com/lists/oss-security/2025/04/23/4 mailing-list

github.com/FastCGI-Archives/fcgi2/issues/67 issue-tracking

github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5 patch

www.synacktiv.com/...25-23016-exploiting-the-fastcgi-library technical-description

github.com/perl-catalyst/FCGI/issues/14 issue-tracking

patch-diff.githubusercontent.com/...ives/fcgi2/pull/74.patch patch

cve.org (CVE-2025-40907)

nvd.nist.gov (CVE-2025-40907)

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