CVE-2023-28625

mod_auth_openidc core dump when OIDCStripCookies is set and an empty Cookie header is supplied

Description

mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. In versions 2.0.0 through 2.4.13.1, when `OIDCStripCookies` is set and a crafted cookie supplied, a NULL pointer dereference would occur, resulting in a segmentation fault. This could be used in a Denial-of-Service attack and thus presents an availability risk. Version 2.4.13.2 contains a patch for this issue. As a workaround, avoid using `OIDCStripCookies`.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.13%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory debian.org Third-Party Advisory debian.org
Affected: OpenIDC mod_auth_openidc
Published at:
Updated at:

References

Link Tags
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qr third party advisory
https://github.com/OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916a patch
https://github.com/OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c#L178-L179 third party advisory
https://github.com/OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2 release notes
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html third party advisory
https://www.debian.org/security/2023/dsa-5405 third party advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WIBKFC22PDH6UXMSZ23PHTD7736ZC7BB/ release notes

Frequently Asked Questions

What is the severity of CVE-2023-28625?
CVE-2023-28625 has been scored as a high severity vulnerability.
How to fix CVE-2023-28625?
To fix CVE-2023-28625, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28625 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28625 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28625?
CVE-2023-28625 affects OpenIDC mod_auth_openidc.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.