RHEL 7 : runc (RHSA-2017:0127)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing a security update.

Description :

An update for runc is now available for Red Hat Enterprise Linux 7
Extras.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The runC tool is a lightweight, portable implementation of the Open
Container Format (OCF) that provides container runtime.

Security Fix(es) :

* The runc component used by `docker exec` feature of docker allowed
additional container processes via to be ptraced by the pid 1 of the
container. This allows the main processes of the container, if running
as root, to gain low-level access to these new processes during
initialization. An attacker can, depending on the nature of the
incoming process, leverage this to elevate access to the host. This
ranges from accessing host content through the file descriptors of the
incoming process to, potentially, a complete container escape by
leveraging memory access or syscall interception. (CVE-2016-9962)

Red Hat would like to thank the Docker project for reporting this
issue. Upstream acknowledges Aleksa Sarai (SUSE) and Tonis Tiigi
(Docker) as the original reporters.

See also :

https://www.redhat.com/security/data/cve/CVE-2016-9962.html
http://rhn.redhat.com/errata/RHSA-2017-0127.html

Solution :

Update the affected runc package.

Risk factor :

Medium / CVSS Base Score : 4.4
(CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 3.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 96598 ()

Bugtraq ID:

CVE ID: CVE-2016-9962

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