7.5

CVE-2023-28625: openidc mod_auth_openidc NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesSUSE-SU-2023:1849-1UBUNTU-CVE-2023-28625DEBIAN-CVE-2023-28625
Published 03-04-2023Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2023-28625 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in openidc mod_auth_openidc. EPSS estimates a 1.32% chance of exploitation in the next 30 days, higher than 70.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 2
DLA-3409-1RHSA-2023:6365RHSA-2023:6940SUSE-SU-2023:1837-1SUSE-SU-2025:4532-1

Timeline

  1. 03-04-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

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`.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.32%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

0.00 pp

From 1.32% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse16 products
  • apache2-mod_auth_openidc&distro=SUSE Enterprise Storage 7< 2.3.8-150100.3.25.1
  • apache2-mod_auth_openidc&distro=SUSE Enterprise Storage 7.1< 2.3.8-150100.3.25.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 2.3.8-150100.3.25.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS< 2.3.8-150100.3.25.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS< 2.3.8-150100.3.25.1
Debian1 product
  • libapache2-mod-auth-openidc< 2.4.12.3-2 | < 2.4.9.4-0+deb11u3
Openidc1 product
Opensuse1 product
  • apache2-mod_auth_openidc&distro=openSUSE Leap 15.4< 2.3.8-150100.3.25.1
Ubuntu1 product
  • libapache2-mod-auth-openidcAll versions (No fix recorded)

5 vendors · 20 products

References

14 links
Show all 14 references