Home/CVE/mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID
CVE

CVE-2023-28625

mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID

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.

HIGH · CVSS 7.5 EPSS 0.00113
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

1
openidc mod auth openidc>= 2.0.0 and < 2.4.13.2
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Apr 2023 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

6
suse-csafSUSE-SU-2025:4532-1
msrcCVE-2023-28625
suse-csafSUSE-SU-2023:1849-1
suse-csafSUSE-SU-2023:1837-1
rhsaRHSA-2023:6940Moderate
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
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