CVE-2022-0336

Name	CVE-2022-0336
Description	The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.
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	1004694

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
samba (PTS)	buster	2:4.9.5+dfsg-5+deb10u3	vulnerable
	buster (security)	2:4.9.5+dfsg-5+deb10u4	vulnerable
	bullseye	2:4.13.13+dfsg-1~deb11u5	fixed
	bullseye (security)	2:4.13.13+dfsg-1~deb11u6	fixed
	bookworm, bookworm (security)	2:4.17.12+dfsg-0+deb12u1	fixed
	trixie	2:4.19.5+dfsg-1	fixed
	sid	2:4.19.6+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
samba	source	experimental	2:4.16.0+dfsg-1
samba	source	bullseye	2:4.13.13+dfsg-1~deb11u3
samba	source	(unstable)	2:4.16.0+dfsg-2	1004694

Notes

[buster] - samba <ignored> (Minor issue; affects Samba as AD DC; EOLed. See DSA-5015-1)
https://www.samba.org/samba/security/CVE-2022-0336.html
https://bugzilla.samba.org/show_bug.cgi?id=14950