RHSA-2009:0382-01 Moderate: libvirt security update
Posted on: 03/19/2009 06:45 PM

A new update is available for Red Hat Enterprise Linux. Here the announcement:

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Red Hat Security Advisory

Synopsis: Moderate: libvirt security update
Advisory ID: RHSA-2009:0382-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-0382.html
Issue date: 2009-03-19
CVE Names: CVE-2008-5086 CVE-2009-0036
=====================================================================

1. Summary:

Updated libvirt packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

RHEL Desktop Multi OS (v. 5 client) - i386, x86_64
RHEL Virtualization (v. 5 server) - i386, ia64, x86_64

3. Description:

libvirt is a C API for managing and interacting with the virtualization
capabilities of Linux and other operating systems. libvirt also provides
tools for remotely managing virtualized systems.

The libvirtd daemon was discovered to not properly check user connection
permissions before performing certain privileged actions, such as
requesting migration of an unprivileged guest domain to another system. A
local user able to establish a read-only connection to libvirtd could use
this flaw to perform actions that should be restricted to read-write
connections. (CVE-2008-5086)

libvirt_proxy, a setuid helper application allowing non-privileged users to
communicate with the hypervisor, was discovered to not properly validate
user requests. Local users could use this flaw to cause a stack-based
buffer overflow in libvirt_proxy, possibly allowing them to run arbitrary
code with root privileges. (CVE-2009-0036)

All users are advised to upgrade to these updated packages, which contain
backported patches which resolve these issues. After installing the update,
libvirtd must be restarted manually (for example, by issuing a
"service libvirtd restart" command) for this change to take effect.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

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

476560 - CVE-2008-5086 libvirt: missing checks for read-only connection
484947 - CVE-2009-0036 libvirt: libvirt_proxy buffer overflow

6. Package List:

RHEL Desktop Multi OS (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/libvirt-0.3.3-14.el5_3.1.src.rpm

i386:
libvirt-0.3.3-14.el5_3.1.i386.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.i386.rpm
libvirt-devel-0.3.3-14.el5_3.1.i386.rpm
libvirt-python-0.3.3-14.el5_3.1.i386.rpm

x86_64:
libvirt-0.3.3-14.el5_3.1.i386.rpm
libvirt-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.i386.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-devel-0.3.3-14.el5_3.1.i386.rpm
libvirt-devel-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-python-0.3.3-14.el5_3.1.x86_64.rpm

RHEL Virtualization (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/libvirt-0.3.3-14.el5_3.1.src.rpm

i386:
libvirt-0.3.3-14.el5_3.1.i386.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.i386.rpm
libvirt-devel-0.3.3-14.el5_3.1.i386.rpm
libvirt-python-0.3.3-14.el5_3.1.i386.rpm

ia64:
libvirt-0.3.3-14.el5_3.1.ia64.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.ia64.rpm
libvirt-devel-0.3.3-14.el5_3.1.ia64.rpm
libvirt-python-0.3.3-14.el5_3.1.ia64.rpm

x86_64:
libvirt-0.3.3-14.el5_3.1.i386.rpm
libvirt-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.i386.rpm
libvirt-debuginfo-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-devel-0.3.3-14.el5_3.1.i386.rpm
libvirt-devel-0.3.3-14.el5_3.1.x86_64.rpm
libvirt-python-0.3.3-14.el5_3.1.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5086
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0036
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is lt;secalert@redhat.comgt;. More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
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