-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.1100
                       Moderate: kvm security update
                              7 December 2010

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kvm
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 5
                   Red Hat Enterprise Linux WS/Desktop 5
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-3698  

Reference:         ESB-2010.1025

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2010-0898.html

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: kvm security update
Advisory ID:       RHSA-2010:0898-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0898.html
Issue date:        2010-12-06
CVE Names:         CVE-2010-3698 
=====================================================================

1. Summary:

Updated kvm packages that fix one security issue are now available for Red
Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
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.

2. Relevant releases/architectures:

RHEL Desktop Multi OS (v. 5 client) - x86_64
RHEL Virtualization (v. 5 server) - x86_64

3. Description:

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for
the standard Red Hat Enterprise Linux kernel.

A flaw was found in the way QEMU-KVM handled the reloading of fs and gs
segment registers when they had invalid selectors. A privileged host user
with access to "/dev/kvm" could use this flaw to crash the host (denial of
service). (CVE-2010-3698)

All KVM users should upgrade to these updated packages, which contain a
backported patch to correct this issue. Note: The procedure in the Solution
section must be performed before this update will take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

The following procedure must be performed before this update will take
effect:

1) Stop all KVM guest virtual machines.

2) Either reboot the hypervisor machine or, as the root user, remove (using
"modprobe -r [module]") and reload (using "modprobe [module]") all of the
following modules which are currently running (determined using "lsmod"):
kvm, ksm, kvm-intel or kvm-amd.

3) Restart the KVM guest virtual machines.

5. Bugs fixed (http://bugzilla.redhat.com/):

639879 - CVE-2010-3698 kvm: invalid selector in fs/gs causes kernel panic

6. Package List:

RHEL Desktop Multi OS (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kvm-83-164.el5_5.25.src.rpm

x86_64:
kmod-kvm-83-164.el5_5.25.x86_64.rpm
kvm-83-164.el5_5.25.x86_64.rpm
kvm-debuginfo-83-164.el5_5.25.x86_64.rpm
kvm-qemu-img-83-164.el5_5.25.x86_64.rpm
kvm-tools-83-164.el5_5.25.x86_64.rpm

RHEL Virtualization (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kvm-83-164.el5_5.25.src.rpm

x86_64:
kmod-kvm-83-164.el5_5.25.x86_64.rpm
kvm-83-164.el5_5.25.x86_64.rpm
kvm-debuginfo-83-164.el5_5.25.x86_64.rpm
kvm-qemu-img-83-164.el5_5.25.x86_64.rpm
kvm-tools-83-164.el5_5.25.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-3698.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2010 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFM/TfeXlSAg2UNWIIRAq/kAKCdP8/0m2O6wjNfu7GcY5RjT9OqyACgksCW
DGFTL0BJqz7lhhLYNucODDA=
=uxYW
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iD8DBQFM/bWB/iFOrG6YcBERAueKAKDJ0eiUxfdwNEIcAPKQuu+fO/4SCgCfThNL
UQ4H+kKHXRmBoIHBspf59bI=
=bbP/
-----END PGP SIGNATURE-----