| Name | CVE-2025-3891 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4155-1, DSA-5917-1 |
| Debian Bugs | 1104484 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libapache2-mod-auth-openidc (PTS) | bullseye | 2.4.9.4-0+deb11u4 | vulnerable |
| bullseye (security) | 2.4.9.4-0+deb11u6 | fixed | |
| bookworm, bookworm (security) | 2.4.12.3-2+deb12u4 | fixed | |
| trixie, sid | 2.4.17-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libapache2-mod-auth-openidc | source | bullseye | 2.4.9.4-0+deb11u6 | DLA-4155-1 | ||
| libapache2-mod-auth-openidc | source | bookworm | 2.4.12.3-2+deb12u4 | DSA-5917-1 | ||
| libapache2-mod-auth-openidc | source | (unstable) | 2.4.14.2-1 | 1104484 |
https://bugzilla.redhat.com/show_bug.cgi?id=2361633
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86
Fixed by: https://github.com/OpenIDC/mod_auth_openidc/commit/29ea79dea97cdab1b0d150af2c9a50a442e7216e (v2.4.13.2)