CVE-2021-30465

Name	CVE-2021-30465
Description	runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	988768

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
runc (PTS)	buster	1.0.0~rc6+dfsg1-3	vulnerable
	bullseye	1.0.0~rc93+ds1-5+deb11u2	fixed
	bookworm, sid	1.1.4+ds1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
runc	source	(unstable)	1.0.0~rc93+ds1-5			988768

Notes

[stretch] - runc <no-dsa> (Intrusive to backport fix)
https://www.openwall.com/lists/oss-security/2021/05/19/2
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r
Initial patch in -4, but revised patch was applied only in -5