Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2011.1070
Moderate: xen security and bug fix update
25 October 2011
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: xen
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2011-3346
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2011-1401.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running xen check for an updated version of the software for their
operating system.
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: xen security and bug fix update
Advisory ID: RHSA-2011:1401-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1401.html
Issue date: 2011-10-24
CVE Names: CVE-2011-3346
=====================================================================
1. Summary:
Updated xen packages that fix one security issue and three bugs 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) - 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.
A buffer overflow flaw was found in the Xen hypervisor SCSI subsystem
emulation. An unprivileged, local guest user could provide a large number
of bytes that are used to zero out a fixed-sized buffer via a SAI READ
CAPACITY SCSI command, overwriting memory and causing the guest to crash.
(CVE-2011-3346)
This update also fixes the following bugs:
* Prior to this update, the vif-bridge script used a maximum transmission
unit (MTU) of 1500 for a new Virtual Interface (VIF). As a result, the MTU
of the VIF could differ from that of the target bridge. This update fixes
the VIF hot-plug script so that the default MTU for new VIFs will match
that of the target Xen hypervisor bridge. In combination with a new enough
kernel (RHSA-2011:1386), this enables the use of jumbo frames in Xen
hypervisor guests. (BZ#738608)
* Prior to this update, the network-bridge script set the MTU of the bridge
to 1500. As a result, the MTU of the Xen hypervisor bridge could differ
from that of the physical interface. This update fixes the network script
so the MTU of the bridge can be set higher than 1500, thus also providing
support for jumbo frames. Now, the MTU of the Xen hypervisor bridge will
match that of the physical interface. (BZ#738610)
* Red Hat Enterprise Linux 5.6 introduced an optimized migration handling
that speeds up the migration of guests with large memory. However, the new
migration procedure can theoretically cause data corruption. While no cases
were observed in practice, with this update, the xend daemon properly waits
for correct device release before the guest is started on a destination
machine, thus fixing this bug. (BZ#743850)
Note: Before a guest is using a new enough kernel (RHSA-2011:1386), the MTU
of the VIF will drop back to 1500 (if it was set higher) after migration.
All xen users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing the
updated packages, the xend service must be restarted 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/):
736038 - CVE-2011-3346 qemu: local DoS with SCSI CD-ROM
738608 - vif (netback) should take its default MTU from the bridge
738610 - The network-bridge script does not set the MTU of the bridge to match the MTU of the physical interface
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-3.0.3-132.el5_7.2.src.rpm
i386:
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-libs-3.0.3-132.el5_7.2.i386.rpm
x86_64:
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.x86_64.rpm
xen-libs-3.0.3-132.el5_7.2.i386.rpm
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm
RHEL Desktop Multi OS (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-132.el5_7.2.src.rpm
i386:
xen-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-devel-3.0.3-132.el5_7.2.i386.rpm
x86_64:
xen-3.0.3-132.el5_7.2.x86_64.rpm
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.x86_64.rpm
xen-devel-3.0.3-132.el5_7.2.i386.rpm
xen-devel-3.0.3-132.el5_7.2.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-132.el5_7.2.src.rpm
i386:
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-libs-3.0.3-132.el5_7.2.i386.rpm
ia64:
xen-debuginfo-3.0.3-132.el5_7.2.ia64.rpm
xen-libs-3.0.3-132.el5_7.2.ia64.rpm
x86_64:
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.x86_64.rpm
xen-libs-3.0.3-132.el5_7.2.i386.rpm
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-132.el5_7.2.src.rpm
i386:
xen-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-devel-3.0.3-132.el5_7.2.i386.rpm
ia64:
xen-3.0.3-132.el5_7.2.ia64.rpm
xen-debuginfo-3.0.3-132.el5_7.2.ia64.rpm
xen-devel-3.0.3-132.el5_7.2.ia64.rpm
x86_64:
xen-3.0.3-132.el5_7.2.x86_64.rpm
xen-debuginfo-3.0.3-132.el5_7.2.i386.rpm
xen-debuginfo-3.0.3-132.el5_7.2.x86_64.rpm
xen-devel-3.0.3-132.el5_7.2.i386.rpm
xen-devel-3.0.3-132.el5_7.2.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-2011-3346.html
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHSA-2011-1386.html
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)
iD8DBQFOpZ02XlSAg2UNWIIRAp8EAJ4+aNIWB+gsdUuU/679sxt3qx5l0wCbBQRk
GE8djRuPU/fjUTiaSUEStc0=
=wChd
- -----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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=ao3Q
-----END PGP SIGNATURE-----