RHEL 5 : xen (RHSA-2007:0323)

This script is Copyright (C) 2007-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

An updated Xen package to fix multiple security issues is now
available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the
Red Hat Security Response Team.

The Xen package contains the tools for managing the virtual machine
monitor in Red Hat Enterprise Linux virtualization.

The following security flaws are fixed in the updated Xen package :

Joris van Rantwijk found a flaw in the Pygrub utility which is used as
a boot loader for guest domains. A malicious local administrator of a
guest domain could create a carefully crafted grub.conf file which
would trigger the execution of arbitrary code outside of that domain.
(CVE-2007-4993)

Tavis Ormandy discovered a heap overflow flaw during video-to-video
copy operations in the Cirrus VGA extension code used in Xen. A
malicious local administrator of a guest domain could potentially
trigger this flaw and execute arbitrary code outside of the domain.
(CVE-2007-1320)

Tavis Ormandy discovered insufficient input validation leading to a
heap overflow in the Xen NE2000 network driver. If the driver is in
use, a malicious local administrator of a guest domain could
potentially trigger this flaw and execute arbitrary code outside of
the domain. Xen does not use this driver by default. (CVE-2007-1321)

Users of Xen should update to these erratum packages containing
backported patches which correct these issues.

See also :

https://www.redhat.com/security/data/cve/CVE-2007-1320.html
https://www.redhat.com/security/data/cve/CVE-2007-1321.html
https://www.redhat.com/security/data/cve/CVE-2007-4993.html
http://rhn.redhat.com/errata/RHSA-2007-0323.html

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)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 26903 ()

Bugtraq ID:

CVE ID: CVE-2007-1320
CVE-2007-1321
CVE-2007-4993