Scientific Linux Security Update : xen on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

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

Description :

The xen packages contain administration tools and the xend service for
managing the kernel-xen kernel for virtualization on Red Hat
Enterprise Linux.

A flaw was found in the way QEMU handled VT100 terminal escape
sequences when emulating certain character devices. A guest user with
privileges to write to a character device that is emulated on the host
using a virtual console back-end could use this flaw to crash the qemu
process on the host or, possibly, escalate their privileges on the
host. (CVE-2012-3515)

This flaw did not affect the default use of the Xen hypervisor
implementation in Red Hat Enterprise Linux 5. This problem only
affected fully-virtualized guests that have a serial or parallel
device that uses a virtual console (vc) back-end. By default, the
virtual console back-end is not used for such devices
only guests
explicitly configured to use them in this way were affected.

All users of xen are advised to upgrade to these updated packages,
which correct this issue. After installing the updated packages, all
fully-virtualized guests must be restarted for this update to take
effect.

See also :

http://www.nessus.org/u?5c9721ff

Solution :

Update the affected xen, xen-devel and / or xen-libs packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61796 ()

Bugtraq ID:

CVE ID: CVE-2012-3515