Vulnerability identifier: #VU22482

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-16884

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
runc
Server applications / Virtualization software

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect checking of the mount targets in libcontainer/rootfs_linux.go in runc. A local user can bypass AppArmor restrictions and perform unauthorized actions on the system, as demonstrated by overwriting the /proc directory with a malicious Doker image.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

runc: 1.0.0 rc1 - 1.0.0 rc8

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CPE

• cpe:2.3:a:linux_foundation:runc:1.0.0:rc8:*:*:*:*:*:*

External links
http://github.com/opencontainers/runc/issues/2128
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DGK6IV5JGVDXHOXEKJOJWKOVNZLT6MYR/

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?