#VU22482 Permissions, Privileges, and Access Controls in runc

Published: 2019-11-01 | Updated: 2019-11-21

Vulnerability identifier: #VU22482

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16884


Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Server applications / Virtualization software

Vendor: Linux Foundation


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.

Install updates from vendor's website.

Vulnerable software versions

runc: 1.0.0 rc1 - 1.0.0 rc8

External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability