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Debian dla-4129 : libapache2-mod-auth-openidc - security update

high Nessus Plugin ID 234574

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Synopsis

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

Description

The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dla-4129 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4129-1 [email protected] https://www.debian.org/lts/security/ Moritz Schlarb April 17, 2025 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : libapache2-mod-auth-openidc Version : 2.4.9.4-0+deb11u5 CVE ID : CVE-2025-31492 Debian Bug : 1102413

 A vulnerability has been fixed 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.

 The bug in mod_auth_openidc results in disclosure of protected content to unauthenticated users.
 The conditions for disclosure are the following directives:
 OIDCProviderAuthRequestMethod POST Require valid-user and there mustn't be any application-level gateway (or load balancer etc) protecting the server.
 When you request a protected resource, the response includes the HTTP status, the HTTP headers, the intended response (the self-submitting form), *and the protected resource (with no headers)*.
 The patch fixing this issue has been backported from mod_auth_openidc 2.4.16.11.

 For Debian 11 bullseye, this problem has been fixed in version 2.4.9.4-0+deb11u5.

 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

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

https://security-tracker.debian.org/tracker/CVE-2025-31492

http://www.nessus.org/u?d778800c

Plugin Details

Severity: High

ID: 234574

File Name: debian_DLA-4129.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/17/2025

Updated: 4/18/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-31492

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:H/I:N/A:N

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, 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: 4/17/2025

Vulnerability Publication Date: 4/6/2025

Reference Information

CVE: CVE-2025-31492

IAVB: 2025-B-0058