Descriptionrunc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite the host runc binary (and consequently obtain host root access) by leveraging the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh (attack range: remote)
Debian Bugs922050, 922169

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lxc (PTS)jessie1:1.0.6-6+deb8u6vulnerable
jessie (security)1:1.0.6-6+deb8u2vulnerable
bullseye, sid, buster1:3.1.0+really3.0.3-8fixed
runc (PTS)stretch0.1.1+dfsg1-2+deb9u1fixed
bullseye, sid, buster1.0.0~rc6+dfsg1-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

runc: Fixed by:
lxc: Fixed by:
Not considered a security issue by LXC upstream

Search for package or bug name: Reporting problems