Gentoo GLSA 201701-34: runC Moderate Privilege Escalation Risk
gentoo
January 13, 2017
A vulnerability in runC could lead to privilege escalation.
Summary
A vulnerability was discovered in runC that allows 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.
Topics Covered
Resolution
All runC users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot -v ">=app-emulation/runc-1.0.0_rc2-r2"
References
[ 1 ] CVE-2016-9962 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9962
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201701-34
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Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
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Severity: Normal
Title: runC: Privilege escalation
Date: January 12, 2017
Bugs: #605378
ID: 201701-34
Topics Covered
Background
RunC is a CLI tool for spawning and running containers according to the
OCI specification.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
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1 app-emulation/runc < 1.0.0_rc2-r2 >= 1.0.0_rc2-r2
Impact
=====
An attacker, who is able to successfully escape the container or modify
runC's state before process initialization, could escalate privileges.
Workaround
There is no known workaround at this time.
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