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CVE-2019-16884

Published: 25 September 2019

runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor restriction bypass because libcontainer/rootfs_linux.go incorrectly checks mount targets, and thus a malicious Docker image can mount over a /proc directory.

From the Ubuntu security team

It was discovered that runC incorrectly implemented AppArmor restrictions. An attacker could possibly use this issue to mount malicious images.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
runc
Launchpad, Ubuntu, Debian
Upstream
Released (1.0.0~rc9)
Ubuntu 21.10 (Impish Indri)
Released (1.0.0~rc8+git20190923.3e425f80-0ubuntu1)
Ubuntu 21.04 (Hirsute Hippo)
Released (1.0.0~rc8+git20190923.3e425f80-0ubuntu1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1.0.0~rc8+git20190923.3e425f80-0ubuntu1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.0.0~rc10-0ubuntu1~18.04.2)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needed)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
Upstream: https://github.com/opencontainers/runc/commit/331692baa7afdf6c186f8667cb0e6362ea0802b3