CVE-2018-6553

Name	CVE-2018-6553
Description	The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1426-1, DSA-4243-1, ELA-15-1
Debian Bugs	903605

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
cups (PTS)	jessie, jessie (lts)	1.7.5-11+deb8u12	fixed
	stretch (security)	2.2.1-8+deb9u8	fixed
	stretch (lts), stretch	2.2.1-8+deb9u12	fixed
	buster, buster (lts)	2.2.10-6+deb10u11	fixed
	buster (security)	2.2.10-6+deb10u10	fixed
	bullseye	2.3.3op2-3+deb11u8	fixed
	bullseye (security)	2.3.3op2-3+deb11u9	fixed
	bookworm (security), bookworm	2.4.2-3+deb12u8	fixed
	sid, trixie	2.4.10-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cups	source	wheezy	1.5.3-5+deb7u9		ELA-15-1
cups	source	jessie	1.7.5-11+deb8u4		DLA-1426-1
cups	source	stretch	2.2.1-8+deb9u2		DSA-4243-1
cups	source	(unstable)	2.2.8-5			903605