CVE-2025-23016

Publication date 10 January 2025

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.3 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
libfcgi 25.10 questing
Fixed 2.4.5-0.1
25.04 plucky
Fixed 2.4.2-2.1ubuntu0.25.04.1
24.10 oracular
Fixed 2.4.2-2.1ubuntu0.24.10.1
24.04 LTS noble
Fixed 2.4.2-2.1ubuntu0.24.04.1
22.04 LTS jammy
Fixed 2.4.2-2ubuntu0.1
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libfcgi

Severity score breakdown

Parameter Value
Base score 9.3 · Critical
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references