CVE-2025-3576

Name	CVE-2025-3576
Description	A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
krb5 (PTS)	bullseye	1.18.3-6+deb11u5	vulnerable
	bullseye (security)	1.18.3-6+deb11u6	vulnerable
	bookworm, bookworm (security)	1.20.1-2+deb12u2	vulnerable
	sid, trixie	1.21.3-5	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
krb5	source	(unstable)	(unfixed)

https://bugzilla.redhat.com/show_bug.cgi?id=2359465
check upstream details