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

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

                               ESB-2011.0519
                      Important: xen security update
                                12 May 2011

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

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

Product:           xen
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux 5
Impact/Access:     Denial of Service               -- Existing Account
                   Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-1583  

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2011-0496.html

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

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

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

Synopsis:          Important: xen security update
Advisory ID:       RHSA-2011:0496-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-0496.html
Issue date:        2011-05-09
CVE Names:         CVE-2011-1583 
=====================================================================

1. Summary:

Updated xen packages that fix several security issues are now available for
Red Hat Enterprise Linux 5.

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.

2. Relevant releases/architectures:

RHEL Desktop Multi OS (v. 5 client) - i386, x86_64
RHEL Virtualization (v. 5 server) - i386, ia64, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

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

It was found that the xc_try_bzip2_decode() and xc_try_lzma_decode() decode
routines did not correctly check for a possible buffer size overflow in the
decoding loop. As well, several integer overflow flaws and missing
error/range checking were found that could lead to an infinite loop. A
privileged guest user could use these flaws to crash the guest or,
possibly, execute arbitrary code in the privileged management domain
(Dom0). (CVE-2011-1583)

All xen users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to 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
https://access.redhat.com/kb/docs/DOC-11259

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

696927 - CVE-2011-1583 xen: insufficiencies in pv kernel image validation

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-120.el5_6.2.src.rpm

i386:
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-libs-3.0.3-120.el5_6.2.i386.rpm

x86_64:
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.x86_64.rpm
xen-libs-3.0.3-120.el5_6.2.i386.rpm
xen-libs-3.0.3-120.el5_6.2.x86_64.rpm

RHEL Desktop Multi OS (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-120.el5_6.2.src.rpm

i386:
xen-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-devel-3.0.3-120.el5_6.2.i386.rpm

x86_64:
xen-3.0.3-120.el5_6.2.x86_64.rpm
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.x86_64.rpm
xen-devel-3.0.3-120.el5_6.2.i386.rpm
xen-devel-3.0.3-120.el5_6.2.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-120.el5_6.2.src.rpm

i386:
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-libs-3.0.3-120.el5_6.2.i386.rpm

ia64:
xen-debuginfo-3.0.3-120.el5_6.2.ia64.rpm
xen-libs-3.0.3-120.el5_6.2.ia64.rpm

x86_64:
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.x86_64.rpm
xen-libs-3.0.3-120.el5_6.2.i386.rpm
xen-libs-3.0.3-120.el5_6.2.x86_64.rpm

RHEL Virtualization (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-120.el5_6.2.src.rpm

i386:
xen-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-devel-3.0.3-120.el5_6.2.i386.rpm

ia64:
xen-3.0.3-120.el5_6.2.ia64.rpm
xen-debuginfo-3.0.3-120.el5_6.2.ia64.rpm
xen-devel-3.0.3-120.el5_6.2.ia64.rpm

x86_64:
xen-3.0.3-120.el5_6.2.x86_64.rpm
xen-debuginfo-3.0.3-120.el5_6.2.i386.rpm
xen-debuginfo-3.0.3-120.el5_6.2.x86_64.rpm
xen-devel-3.0.3-120.el5_6.2.i386.rpm
xen-devel-3.0.3-120.el5_6.2.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-2011-1583.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2011 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFNyA+jXlSAg2UNWIIRAt6QAJ9mabE0BcI5xfVHglu2b30qGXXGnwCdGo39
l0tqwYfwbVoZY/lsmH4RAvY=
=YCAR
- -----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

iD8DBQFNy2Ad/iFOrG6YcBERAk2TAKCUAKucNPH99gZng4ib/ilo/xAajACghSoU
09n4G0Gws0n0Xg2USe8LUX0=
=rMAl
-----END PGP SIGNATURE-----