CVE-2024-24814 Affecting libapache2-mod-auth-openidc package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.21% (44th percentile)

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  • Snyk IDSNYK-UBUNTU2004-LIBAPACHE2MODAUTHOPENIDC-6246561
  • published15 Apr 2025
  • disclosed13 Feb 2024

Introduced: 13 Feb 2024

CVE-2024-24814  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:20.04 libapache2-mod-auth-openidc.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libapache2-mod-auth-openidc package and not the libapache2-mod-auth-openidc package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. In affected versions missing input validation on mod_auth_openidc_session_chunks cookie value makes the server vulnerable to a denial of service (DoS) attack. An internal security audit has been conducted and the reviewers found that if they manipulated the value of the mod_auth_openidc_session_chunks cookie to a very large integer, like 99999999, the server struggles with the request for a long time and finally gets back with a 500 error. Making a few requests of this kind caused our server to become unresponsive. Attackers can craft requests that would make the server work very hard (and possibly become unresponsive) and/or crash with minimal effort. This issue has been addressed in version 2.4.15.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS Base Scores

version 3.1