CVE-2020-25719

Name	CVE-2020-25719
Description	A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-5003-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
samba (PTS)	bullseye (security), bullseye	2:4.13.13+dfsg-1~deb11u6	fixed
	bookworm, bookworm (security)	2:4.17.12+dfsg-0+deb12u1	fixed
	trixie	2:4.21.2+dfsg-3	fixed
	sid	2:4.21.2+dfsg-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
samba	source	bullseye	2:4.13.13+dfsg-1~deb11u2		DSA-5003-1
samba	source	(unstable)	2:4.13.14+dfsg-1

Notes

[buster] - samba <ignored> (Intrusive backport; affects Samba as AD DC)
https://bugzilla.samba.org/show_bug.cgi?id=14561
https://bugzilla.samba.org/show_bug.cgi?id=14725
https://www.samba.org/samba/security/CVE-2020-25719.html