Debian dla-4329 : libfcgi-bin - security update

critical Nessus Plugin ID 270142

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4329 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4329-1 [email protected] https://www.debian.org/lts/security/ Thorsten Alteholz October 13, 2025 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : libfcgi Version : 2.4.2-2+deb11u1 CVE ID : CVE-2025-23016

An issue has been found in libfcgi, a FastCGI bridge from CGI. The issue is related to an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket.

For Debian 11 bullseye, this problem has been fixed in version 2.4.2-2+deb11u1.

We recommend that you upgrade your libfcgi packages.

For the detailed security status of libfcgi please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libfcgi

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libfcgi-bin packages.

Plugin Details

Severity: Critical

ID: 270142

File Name: debian_DLA-4329.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/13/2025

Updated: 10/13/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-23016

CVSS v3

Risk Factor: Critical

Base Score: 9.3

Temporal Score: 8.1

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libfcgi-dev, p-cpe:/a:debian:debian_linux:libfcgi0ldbl, p-cpe:/a:debian:debian_linux:libfcgi-bin

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2025

Vulnerability Publication Date: 1/10/2025

Reference Information

CVE: CVE-2025-23016

Detections

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