RHEL 6 : rtkit (RHSA-2013:1282)

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

An updated rtkit package that fixes one security issue is now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System
(CVSS) base score, which gives a detailed severity rating, is
available from the CVE link in the References section.

RealtimeKit is a D-Bus system service that changes the scheduling
policy of user processes/threads to SCHED_RR (that is, realtime
scheduling mode) on request. It is intended to be used as a secure
mechanism to allow real-time scheduling to be used by normal user
processes.

It was found that RealtimeKit communicated with PolicyKit for
authorization using a D-Bus API that is vulnerable to a race
condition. This could have led to intended PolicyKit authorizations
being bypassed. This update modifies RealtimeKit to communicate with
PolicyKit via a different API that is not vulnerable to the race
condition. (CVE-2013-4326)

All rtkit users are advised to upgrade to this updated package, which
contains a backported patch to correct this issue.

See also :

https://www.redhat.com/security/data/cve/CVE-2013-4326.html
http://rhn.redhat.com/errata/RHSA-2013-1282.html

Solution :

Update the affected rtkit and / or rtkit-debuginfo packages.

Risk factor :

Medium / CVSS Base Score : 4.6
(CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 4.0
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 70114 ()

Bugtraq ID: 62505

CVE ID: CVE-2013-4326