CVE-2023-34966

Name	CVE-2023-34966
Description	An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.
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-5477-1

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 (security), bullseye	2:4.13.13+dfsg-1~deb11u5	vulnerable
	bookworm	2:4.17.9+dfsg-0+deb12u3	vulnerable
	bookworm (security)	2:4.17.10+dfsg-0+deb12u1	fixed
	trixie, sid	2:4.19.0+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
samba	source	bookworm	2:4.17.10+dfsg-0+deb12u1		DSA-5477-1
samba	source	(unstable)	2:4.18.5+dfsg-1

https://www.samba.org/samba/security/CVE-2023-34966.html