Privilege scalation in Opencontainers runc



Published: 2019-09-25 | Updated: 2019-11-01
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-16884
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		runc
Server applications / Virtualization software

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU22482

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-16884

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

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

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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