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Category:   Application (Generic)  >   Red Hat Enterprise Virtualization Vendors:   Red Hat
Red Hat Enterprise Virtualization Hypervisor Spice Server Library Bug Lets Local Users Deny Service
SecurityTracker Alert ID:  1029076
SecurityTracker URL:  http://securitytracker.com/id/1029076
CVE Reference:   CVE-2013-4130   (Links to External Site)
Date:  Sep 23 2013
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Red Hat Enterprise Virtualization Hypervisor. A remote user can cause denial of service conditions.

A remote user that can initiate a SPICE connection to a guest operating system can trigger a flaw in the processing of concurrent connections and cause the target guest operating system to crash.

David Gibson of Red Hat reported this vulnerability.

Impact:   A remote user can cause the target guest operating system to crash.
Solution:   The vendor has issued a fix:

RHEV Hypervisor for RHEL-6:

noarch:
rhev-hypervisor6-6.4-20130912.1.el6_4.noarch.rpm

The vendor's advisory is available at:

https://rhn.redhat.com/errata/RHSA-2013-1260.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2013-1260.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   None.


 Source Message Contents

Subject:  [RHSA-2013:1260-01] Moderate: rhev-hypervisor6 security and bug fix update

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

Synopsis:          Moderate: rhev-hypervisor6 security and bug fix update
Advisory ID:       RHSA-2013:1260-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-1260.html
Issue date:        2013-09-23
CVE Names:         CVE-2013-4130 
=====================================================================

1. Summary:

An updated rhev-hypervisor6 package that fixes one security issue and
various bugs is now available.

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:

RHEV Hypervisor for RHEL-6 - noarch

3. Description:

The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor
is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes
everything necessary to run and manage virtual machines: A subset of the
Red Hat Enterprise Linux operating environment and the Red Hat Enterprise
Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.

Upgrade Note: If you upgrade the Red Hat Enterprise Virtualization
Hypervisor through the 3.2 Manager administration portal, the Host may
appear with the status of "Install Failed". If this happens, place the host
into maintenance mode, then activate it again to get the host back to an
"Up" state.

A flaw was found in the way concurrent access to the clients ring buffer
was performed in the spice-server library. A remote user able to initiate a
SPICE connection to a guest could use this flaw to crash the guest.
(CVE-2013-4130)

This issue was discovered by David Gibson of Red Hat.

This update also contains the fix from the following errata:

* vdsm: RHBA-2013:1261
https://rhn.redhat.com/errata/RHBA-2013-1261.html 

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which corrects these issues.

4. Solution:

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/site/articles/11258

To upgrade Hypervisors in Red Hat Enterprise Virtualization
environments using the disk image provided by this package, refer to:

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html

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

984769 - CVE-2013-4130 spice: unsafe clients ring access abort
1006392 - rhev-hypervisor 6.4 Update 5.1 release

6. Package List:

RHEV Hypervisor for RHEL-6:

noarch:
rhev-hypervisor6-6.4-20130912.1.el6_4.noarch.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-2013-4130.html
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHBA-2013-1261.html
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html

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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