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TI-2023-13144 Aliases CVE-2023-28625

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

Priority MEDIUM 42CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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`.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01316 70th percentileScored 2026-11-07
Fix Fixed mod_auth_openidc (OpenIDC): 2.4.13.2Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenIDCmod_auth_openidc2.0.0 to before 2.4.13.22.4.13.2Patch availableCNA
  • mod_auth_openidc VendorOpenIDC Affected 2.0.0 to before 2.4.13.2 Fixed in 2.4.13.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*2.0.0 to before 2.4.13.2VulnerableOpenIDC
  • cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.4.13.2 Vulnerable ·OpenIDC

Remediation

  • Fix · CNA mod_auth_openidc (OpenIDC) Fixed in 2.4.13.2

Red Hat 2 advisories

  • RHSA-2023:6940 Released 2023-11-14 · Red Hat rating Moderate
    mod_auth_openidc:2.3 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) cjose-0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3, cjose-0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3 +11
  • RHSA-2023:6365 Released 2023-11-07 · Red Hat rating Moderate
    mod_auth_openidc security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) mod_auth_openidc-2.4.9.4-4.el9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:6940
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:6365
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28625

References

Patch 1

Advisory 4

Other 2

  • TI-2024-16331 Denial of service when manipulating mod_auth_openidc_session_chunks cookie in mod_auth_openidc CVSS 3.1HIGH 7.5
  • TI-2017-04220 The "OpenID Connect Relying Party and OAuth 2.0 Resource Server" (aka mod_auth_openidc)… CVSS 3.0HIGH 8.6
  • TI-2017-03971 The "OpenID Connect Relying Party and OAuth 2.0 Resource Server" (aka mod_auth_openidc)… CVSS 3.0HIGH 8.6
  • TI-2017-03968 Mod_auth_openidc.c in the Ping Identity OpenID Connect authentication module for Apache… CVSS 3.1HIGH 7.5
  • TI-2021-03944 Uncontrolled resource consumption in OpenIDC mod_auth_openidc CVSS 3.1HIGH 7.5
  • TI-2021-12451 Format string bug in the Redis cache implementation CVSS 3.1HIGH 7.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences