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Red Hat Product Errata RHSA-2011:1401 - Security Advisory
Issued:
2011-10-24
Updated:
2011-10-24

RHSA-2011:1401 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: xen security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

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.

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.

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

Affected Products

  • Red Hat Enterprise Linux Server 5 x86_64
  • Red Hat Enterprise Linux Server 5 ia64
  • Red Hat Enterprise Linux Server 5 i386
  • Red Hat Enterprise Linux Workstation 5 x86_64
  • Red Hat Enterprise Linux Workstation 5 i386
  • Red Hat Enterprise Linux Desktop 5 x86_64
  • Red Hat Enterprise Linux Desktop 5 i386
  • Red Hat Enterprise Linux Server from RHUI 5 x86_64
  • Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

  • BZ - 736038 - CVE-2011-3346 qemu: local DoS with SCSI CD-ROM
  • BZ - 738608 - vif (netback) should take its default MTU from the bridge
  • BZ - 738610 - The network-bridge script does not set the MTU of the bridge to match the MTU of the physical interface

CVEs

  • CVE-2011-3346

References

  • https://access.redhat.com/security/updates/classification/#moderate
  • https://rhn.redhat.com/errata/RHSA-2011-1386.html
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 5

SRPM
xen-3.0.3-132.el5_7.2.src.rpm SHA-256: f80d934f64886e0fad296b335f2061a708e66430ca23ed375b51ce6569d3caa3
x86_64
xen-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 0b867ef119ca5f19af54c7e7db186633629a3b25943f0b2e27a863fc0731f739
xen-devel-3.0.3-132.el5_7.2.i386.rpm SHA-256: 9f60cb2ceee8e1e5ce66c561bc21340c2235050b7c8eb6dce25448e90fbd12d2
xen-devel-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 31f90aa0387206b83fd64360074e093161d4d8bd6c87a6081147a3f1d39230bd
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 7ab489d933145415c08ab3648a4d3ba55f6055a5bdaf746975c6d6c76bf1cd3b
ia64
xen-3.0.3-132.el5_7.2.ia64.rpm SHA-256: 886b7f4883dbd3df6a1409864e7af39a2c9d6eaf89c8e4348f7256898847e594
xen-devel-3.0.3-132.el5_7.2.ia64.rpm SHA-256: 5e4df7ba83e1fdecf4f830531ad2171d416689b36802ee80589ec1b53c2bf3b4
xen-libs-3.0.3-132.el5_7.2.ia64.rpm SHA-256: c5c5faaa7371787b76797f8fbd7b71657fb94269258dd048f8550aa84fbe4be1
i386
xen-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4d3b24cca61261477b328a71703a26748a0f209eed47d8e428ca215d4c083c62
xen-devel-3.0.3-132.el5_7.2.i386.rpm SHA-256: 9f60cb2ceee8e1e5ce66c561bc21340c2235050b7c8eb6dce25448e90fbd12d2
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06

Red Hat Enterprise Linux Workstation 5

SRPM
xen-3.0.3-132.el5_7.2.src.rpm SHA-256: f80d934f64886e0fad296b335f2061a708e66430ca23ed375b51ce6569d3caa3
x86_64
xen-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 0b867ef119ca5f19af54c7e7db186633629a3b25943f0b2e27a863fc0731f739
xen-devel-3.0.3-132.el5_7.2.i386.rpm SHA-256: 9f60cb2ceee8e1e5ce66c561bc21340c2235050b7c8eb6dce25448e90fbd12d2
xen-devel-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 31f90aa0387206b83fd64360074e093161d4d8bd6c87a6081147a3f1d39230bd
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 7ab489d933145415c08ab3648a4d3ba55f6055a5bdaf746975c6d6c76bf1cd3b
i386
xen-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4d3b24cca61261477b328a71703a26748a0f209eed47d8e428ca215d4c083c62
xen-devel-3.0.3-132.el5_7.2.i386.rpm SHA-256: 9f60cb2ceee8e1e5ce66c561bc21340c2235050b7c8eb6dce25448e90fbd12d2
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06

Red Hat Enterprise Linux Desktop 5

SRPM
xen-3.0.3-132.el5_7.2.src.rpm SHA-256: f80d934f64886e0fad296b335f2061a708e66430ca23ed375b51ce6569d3caa3
x86_64
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 7ab489d933145415c08ab3648a4d3ba55f6055a5bdaf746975c6d6c76bf1cd3b
i386
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06

Red Hat Enterprise Linux Server from RHUI 5

SRPM
xen-3.0.3-132.el5_7.2.src.rpm SHA-256: f80d934f64886e0fad296b335f2061a708e66430ca23ed375b51ce6569d3caa3
x86_64
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06
xen-libs-3.0.3-132.el5_7.2.x86_64.rpm SHA-256: 7ab489d933145415c08ab3648a4d3ba55f6055a5bdaf746975c6d6c76bf1cd3b
i386
xen-libs-3.0.3-132.el5_7.2.i386.rpm SHA-256: 4317461c1200696ac121bc8addc94de32b1622170ec1a13880f10d9a00399a06

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

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