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Debian dla-4768 : libapache2-mod-auth-openidc - security update

high Nessus Plugin ID 342373

Synopsis

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

Description

The remote Debian 12 host has a package installed that is affected by a vulnerability as referenced in the dla-4768 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4768-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert September 02, 2026 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : libapache2-mod-auth-openidc Version : 2.4.12.3-2+deb12u5 CVE ID : CVE-2026-54789

 A vulnerability has been found in mod_auth_openidc, an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality.

 CVE-2026-54789

 An out-of-bounds read and a one-byte out-of-bounds write in the state-cookie parser can lead to a DOS.


 For Debian 12 bookworm, this problem has been fixed in version 2.4.12.3-2+deb12u5.

 We recommend that you upgrade your libapache2-mod-auth-openidc packages.

 For the detailed security status of libapache2-mod-auth-openidc please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/libapache2-mod-auth-openidc

 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 Attachment:
 signature.asc Description: This is a digitally signed message part

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 libapache2-mod-auth-openidc packages.

See Also

https://security-tracker.debian.org/tracker/CVE-2026-54789

http://www.nessus.org/u?0371ebc9

http://www.nessus.org/u?c2135714

Plugin Details

Severity: High

ID: 342373

File Name: debian_DLA-4768.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/2/2026

Updated: 9/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-54789

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libapache2-mod-auth-openidc

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/2/2026

Vulnerability Publication Date: 8/21/2026

Reference Information

CVE: CVE-2026-54789