CVE-2025-3891

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)
Debian Bugs	1104484

Vulnerable and fixed packages

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+deb11u5	vulnerable
	bookworm	2.4.12.3-2+deb12u2	vulnerable
	bookworm (security)	2.4.12.3-2+deb12u3	vulnerable
	sid, trixie	2.4.17-1	vulnerable

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	(unstable)	(unfixed)			1104484

https://bugzilla.redhat.com/show_bug.cgi?id=2361633
check upstream status