Articles / Red Hat: Security update fo…

Red Hat: Security update for X11 video driver

The xorg-x11-drv-qxl package provides an X11 video driver for the QEMU QXL video accelerator. A flaw was found in the way the host’s qemu-kvm qxl driver and the guest’s X.Org qxl driver interacted when a SPICE connection terminated. A user able to initiate a SPICE connection to a guest could use this flaw to make the guest temporarily unavailable or, potentially (if the sysctl kernel.softlockup_panic variable was set to “1” in the guest), crash the guest.

Updated packages are available from ftp.redhat.com.

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

Synopsis:          Moderate: xorg-x11-drv-qxl security update
Advisory ID:       RHSA-2013:0218-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-0218.html
Issue date:        2013-01-31
CVE Names:         CVE-2013-0241 
=====================================================================

1. Summary:

An updated xorg-x11-drv-qxl package that fixes one security issue is now
available for Red Hat Enterprise Linux 6.

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:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

The xorg-x11-drv-qxl package provides an X11 video driver for the QEMU QXL
video accelerator. This driver makes it possible to use Red Hat Enterprise
Linux 6 as a guest operating system under the KVM kernel module and the
QEMU multi-platform emulator, using the SPICE protocol.

A flaw was found in the way the host's qemu-kvm qxl driver and the guest's
X.Org qxl driver interacted when a SPICE connection terminated. A user able
to initiate a SPICE connection to a guest could use this flaw to make the
guest temporarily unavailable or, potentially (if the sysctl
kernel.softlockup_panic variable was set to "1" in the guest), crash the
guest. (CVE-2013-0241)

All users of xorg-x11-drv-qxl are advised to upgrade to this updated
package, which contains a backported patch to correct this issue. All
running X.Org server instances using the qxl driver 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/knowledge/articles/11258

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

906032 - CVE-2013-0241 qxl: synchronous io guest DoS

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/xorg-x11-drv-qxl-0.0.14-14.el6_3.src.rpm

i386:
xorg-x11-drv-qxl-0.0.14-14.el6_3.i686.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.i686.rpm

x86_64:
xorg-x11-drv-qxl-0.0.14-14.el6_3.x86_64.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/xorg-x11-drv-qxl-0.0.14-14.el6_3.src.rpm

i386:
xorg-x11-drv-qxl-0.0.14-14.el6_3.i686.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.i686.rpm

x86_64:
xorg-x11-drv-qxl-0.0.14-14.el6_3.x86_64.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/xorg-x11-drv-qxl-0.0.14-14.el6_3.src.rpm

i386:
xorg-x11-drv-qxl-0.0.14-14.el6_3.i686.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.i686.rpm

x86_64:
xorg-x11-drv-qxl-0.0.14-14.el6_3.x86_64.rpm
xorg-x11-drv-qxl-debuginfo-0.0.14-14.el6_3.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-2013-0241.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://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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