Resource Exhaustion Affecting mod_auth_openidc:2.3/mod_auth_openidc package, versions <0:2.4.9.4-6.module+el8.10.0+21813+b5444eb8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-RHEL8-MODAUTHOPENIDC-6247009
  • published14 Feb 2024
  • disclosed13 Feb 2024

Introduced: 13 Feb 2024

CVE-2024-24814  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:8 mod_auth_openidc:2.3/mod_auth_openidc to version 0:2.4.9.4-6.module+el8.10.0+21813+b5444eb8 or higher.
This issue was patched in RHSA-2024:5289.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_auth_openidc:2.3/mod_auth_openidc package and not the mod_auth_openidc:2.3/mod_auth_openidc package as distributed by RHEL. See How to fix? for RHEL:8 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 Scores

version 3.1