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.
| Software | From | Fixed in |
|---|---|---|
| redhat / enterprise_linux | 7.0 | 7.0.x |
| redhat / enterprise_linux | 8.0 | 8.0.x |
| redhat / enterprise_linux | 9.0 | 9.0.x |
| debian / debian_linux | 11.0 | 11.0.x |
- 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
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