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CVE-2023-28625

25
FAUCET Score

CVE-2023-28625 is a Denial-of-Service vulnerability affecting mod_auth_openidc versions 2.0.0 through 2.4.13.1, an OpenID Connect module for Apache HTTP Server. A remote, unauthenticated attacker can trigger a NULL pointer dereference and segmentation fault by supplying a crafted cookie when the OIDCStripCookies directive is enabled. This vulnerability has a CVSS score of 7.5 (High), indicating a significant availability risk with low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE. Organizations are advised to update to version 2.4.13.2 or disable OIDCStripCookies as a workaround.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.4.13.2CPE matchmatch criteria
cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.33%
Probability of exploitation in next 30 days
EPSS Percentile
68.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0133 is in the 48th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: cbl2 mod_auth_openidc 2.4.14.2-1 on CBL Mariner 2.0Fixed in: 2.4.14.2-1
microsoftpatch availablevia msrc
Product: 18363-16823Fixed in: 2.4.14.2-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mod_auth_openidc:2.3-8090020230721123832.b46abd14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: mod_auth_openidc-0:2.4.9.4-4.el9
View patch

Vendor Advisories (2)

microsoft2023-Apr/CVE-2023-28625Important

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

Apr 11, 2023
redhatCVE-2023-28625Moderate

mod_auth_openidc: NULL pointer dereference when OIDCStripCookies is set and a crafted Cookie header is supplied

Apr 3, 2023

References

github.com / OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c
Third Party Advisory
github.com / OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916a
Patch
github.com / OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2
Release Notes
github.com / OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qr
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/04/msg00034.html
Third Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/WIBKFC22PDH6UXMSZ23PHTD7736ZC7BB
Release Notes
debian.org / security/2023/dsa-5405
Third Party Advisory