LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Security Week: September 22nd, 2014
Linux Advisory Watch: September 19th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
Red Hat: 2011:1401-01: xen: Moderate Advisory Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
RedHat Linux 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 [More...]
=====================================================================
                   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 .  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Weekend Edition
Google to turn on encryption by default in next Android version
TOR users become FBI's No.1 hacking target after legal power grab
OWASP Releases Latest App Sec Guide
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.