CVE-2016-9962

Publication date 31 January 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain access to file-descriptors of these new processes during the initialization and can lead to container escapes or modification of runC state before the process is fully placed inside the container.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
docker.io	19.04 disco	Fixed 1.13.1-0ubuntu4
	18.10 cosmic	Fixed 1.13.1-0ubuntu4
	18.04 LTS bionic	Fixed 1.13.1-0ubuntu4
	17.10 artful	Fixed 1.13.1-0ubuntu4
	17.04 zesty	Fixed 1.13.1-0ubuntu1~17.04.1
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 1.13.1-0ubuntu1~16.04.2
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
runc	19.04 disco	Fixed 1.0.0~rc2+docker1.13.1-0ubuntu1
	18.10 cosmic	Fixed 1.0.0~rc2+docker1.13.1-0ubuntu1
	18.04 LTS bionic	Fixed 1.0.0~rc2+docker1.13.1-0ubuntu1
	17.10 artful	Fixed 1.0.0~rc2+docker1.13.1-0ubuntu1
	17.04 zesty	Fixed 1.0.0~rc2+docker1.12.6-0ubuntu1
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
runc	Upstream: 50a19c6

Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.4 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	6.4 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H