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Message-ID: <5a2f67fe-886b-4c2a-a023-d5d5acdfed3f@oracle.com>
Date: Wed, 23 Apr 2025 13:33:27 -0700
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2025-23016: Integer & buffer overflow in fastcgi <
2.4.5
Version 2.4.5 of the fastcgi library was released last week:
https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5
It fixed CVE-2025-23016, which is described as "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."
The upstream bug report can be found at:
https://github.com/FastCGI-Archives/fcgi2/issues/67
and a detailed writeup from the discoverers at:
https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library
which suggests both upgrading to the fixed version and "limiting potential
remote access to the FastCGI socket by declaring it as a UNIX socket."
--
-Alan Coopersmith- alan.coopersmith@...cle.com
Oracle Solaris Engineering - https://blogs.oracle.com/solaris
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