CVE-2025-23016

CRITICAL EPSS 42.7%
Published Jan 10, 20251y ago · Modified Jun 17, 20262w ago
9.3 CVSS 3.1
Critical
Find Similar
Published Jan 10, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.3
Exploitability
2.5
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
42.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

References 5

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.