Scientific Linux Security Update : libvirt on SL6.x i386/x86_64

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


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

A use-after-free flaw was found in the way several libvirt block APIs
handled domain jobs. A remote attacker able to establish a read-only
connection to libvirtd could use this flaw to crash libvirtd or,
potentially, execute arbitrary code with the privileges of the
libvirtd process (usually root). (CVE-2013-6458)

A race condition was found in the way libvirtd handled keepalive
initialization requests when the connection was closed prior to
establishing connection credentials. An attacker able to establish a
read- only connection to libvirtd could use this flaw to crash
libvirtd, resulting in a denial of service. (CVE-2014-1447)

This update also fixes the following bug :

- A race condition was possible between a thread starting
a virtual machine with a guest agent configured (regular
start-up or while migrating) and a thread that was
killing the VM process (or the process crashing). The
race could cause the monitor object to be freed by the
thread that killed the VM process, which was later
accessed by the thread that was attempting to start the
VM, resulting in a crash. This issue was fixed by
checking the state of the VM after the attempted
connection to the guest agent
if the VM in the meantime
exited, no other operations are attempted.

After installing the updated packages, libvirtd will be restarted
automatically.

See also :

http://www.nessus.org/u?1b47cf39

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:A/AC:H/Au:N/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 72197 ()

Bugtraq ID:

CVE ID: CVE-2013-6458
CVE-2014-1447