CVE-2018-1063

Name	CVE-2018-1063
Description	Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary file to a context with few restrictions. This only happens when the relabeling process is done, usually when taking SELinux state from disabled to enable (permissive or enforcing). The issue was found in policycoreutils 2.5-11.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, 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
policycoreutils (PTS)	bullseye	3.1-3	fixed
	bookworm	3.4-1	fixed
	forky, sid, trixie	3.8.1-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
policycoreutils	source	(unstable)	2.7-1

Notes

[stretch] - policycoreutils <no-dsa> (Minor issue)
[jessie] - policycoreutils <no-dsa> (Minor issue)
[wheezy] - policycoreutils <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1550122
Mitigation by removing any symbolic link in /tmp and /var/tmp directories
before relabeling the file system. Futhtermore only triggerable at
relabeling time.
https://github.com/SELinuxProject/selinux/commit/2608b4d6660af0fb8ad93f2cc144bdaab3c2afa8