CVE-2023-28625

Name: CVE-2023-28625
Creator: NVD / NIST
Published: 2023-04-03T14:15:07.507+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2023-28625 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

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`.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Openidc	Mod Auth Openidc	>= 2.0.0, < 2.4.13.2

References

https://github.com/OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c#L178-L179Third Party Advisory
https://github.com/OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916aPatch
https://github.com/OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2Release Notes
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qrThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WIBKFC22PDH6UXMSZ23PHTD7736ZC7BB/Release Notes
https://www.debian.org/security/2023/dsa-5405Third Party Advisory
https://github.com/OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c#L178-L179Third Party Advisory
https://github.com/OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916aPatch
https://github.com/OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2Release Notes
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qrThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WIBKFC22PDH6UXMSZ23PHTD7736ZC7BB/Release Notes
https://www.debian.org/security/2023/dsa-5405Third Party Advisory

Timeline

Published: Apr 3, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-28625?

How severe is CVE-2023-28625?

CVE-2023-28625 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28625?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28625?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST