CVE-2025-23016

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

10/01/2025

Last modified:

03/11/2025

Description

FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has 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

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.30 CRITICAL
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.30

Severity 3.x

CRITICAL

References to Advisories, Solutions, and Tools

https://github.com/FastCGI-Archives/fcgi2/issues/67
https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5
https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library
http://www.openwall.com/lists/oss-security/2025/04/23/4
https://lists.debian.org/debian-lts-announce/2025/10/msg00009.html
https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library