CVE-2025-3891
A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - secalert@redhat.com
- Published
- 2025-04-29
- Last modified
- 2026-06-29
- Weaknesses
- CWE-248
Affected products
- Http Server (Apache)
- Debian Linux (Debian)
- Enterprise Linux (Redhat)
- Rhel Aus (Redhat)
- Rhel E4s (Redhat)
- Rhel Eus (Redhat)
- Rhel Tus (Redhat)
References
- https://access.redhat.com/errata/RHSA-2025:10002
- https://access.redhat.com/errata/RHSA-2025:10003
- https://access.redhat.com/errata/RHSA-2025:10004
- https://access.redhat.com/errata/RHSA-2025:10006
- https://access.redhat.com/errata/RHSA-2025:10007
- https://access.redhat.com/errata/RHSA-2025:10008
- https://access.redhat.com/errata/RHSA-2025:10010
- https://access.redhat.com/errata/RHSA-2025:4597
- https://access.redhat.com/errata/RHSA-2025:9396
- https://access.redhat.com/security/cve/CVE-2025-3891
- https://bugzilla.redhat.com/show_bug.cgi?id=2361633
- https://github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b
- https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86
- https://lists.debian.org/debian-lts-announce/2025/05/msg00007.html
