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ESB-2010.0563 - [RedHat] rhev-hypervisor: Multiple vulnerabilities
Date: 23 June 2010
Original URL:
References: ESB-2010.0268  ESB-2010.0388  ESB-2010.0416  ESB-2010.0420  

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Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

   Important: rhev-hypervisor security, bug fix, and enhancement update
                               23 June 2010


        AusCERT Security Bulletin Summary

Product:           rhev-hypervisor
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-2223 CVE-2010-1163 CVE-2010-1086
                   CVE-2010-1085 CVE-2010-0741 CVE-2010-0730
                   CVE-2010-0427 CVE-2010-0426 CVE-2010-0410
                   CVE-2010-0307 CVE-2009-3767 CVE-2009-1189

Reference:         ESB-2010.0420

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

Hash: SHA1

                   Red Hat Security Advisory

Synopsis:          Important: rhev-hypervisor security, bug fix, and enhancement update
Advisory ID:       RHSA-2010:0476-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:
Issue date:        2010-06-22
CVE Names:         CVE-2010-0741 CVE-2010-2223 

1. Summary:

An updated rhev-hypervisor package that fixes two security issues, multiple
bugs, and adds enhancements is now available.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Virtualization Hypervisor 5 - noarch

3. Description:

The rhev-hypervisor 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.

A flaw was found in the way QEMU-KVM handled erroneous data provided by the
Linux virtio-net driver, used by guest operating systems. Due to a
deficiency in the TSO (TCP segment offloading) implementation, a guest's
virtio-net driver would transmit improper data to a certain QEMU-KVM
process on the host, causing the guest to crash. A remote attacker could
use this flaw to send specially-crafted data to a target guest system,
causing that guest to crash. (CVE-2010-0741)

A flaw was found in the way the Virtual Desktop Server Manager (VDSM)
handled the removal of a virtual machine's (VM) data back end (such as an
image or a volume). When removing an image or a volume, it was not securely
deleted from its corresponding data domain as expected. A guest user in a
new, raw VM, created in a data domain that has had VMs deleted from it,
could use this flaw to read limited data from those deleted VMs,
potentially disclosing sensitive information. (CVE-2010-2223)

This updated package provides updated components that include fixes for
security issues; however, these issues have no security impact for Red Hat
Enterprise Virtualization Hypervisor. These fixes are for dbus issue
CVE-2009-1189; kernel issues CVE-2010-0307, CVE-2010-0410, CVE-2010-0730,
CVE-2010-1085, and CVE-2010-1086; openldap issue CVE-2009-3767; and sudo
issues CVE-2010-0426, CVE-2010-0427, and CVE-2010-1163.

This update also fixes several bugs and adds several enhancements.
Documentation for these bug fixes and enhancements is available from

As Red Hat Enterprise Virtualization Hypervisor is based on KVM, the bug
fixes and enhancements from the KVM updates RHSA-2010:0271 and
RHBA-2010:0419 have been included in this update. Also included are the bug
fixes and enhancements from the Virtual Desktop Server Manager (VDSM)
update RHSA-2010:0473, and fence-agents update RHBA-2010:0477.

KVM: and

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

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

5. Bugs fixed (

577218 - CVE-2010-0741 qemu: Improper handling of erroneous data provided by Linux virtio-net driver
604752 - CVE-2010-2223 vdsm: missing VM post-zeroing after removal

6. Package List:

Red Hat Enterprise Virtualization Hypervisor 5:



These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from

7. References:

8. Contact:

The Red Hat security contact is <>.  More contact
details at

Copyright 2010 Red Hat, Inc.
Version: GnuPG v1.4.4 (GNU/Linux)


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