Moderate CentOS libvirt Security Update

Metadata

medium
5.8
libvirt-0.10.2-46.el6_6.2.i686.rpm, libvirt-0.10.2-46.el6_6.2.src.rpm, libvirt-0.10.2-46.el6_6.2.x86_64.rpm, libvirt-client-0.10.2-46.el6_6.2.i686.rpm, libvirt-client-0.10.2-46.el6_6.2.x86_64.rpm, libvirt-devel-0.10.2-46.el6_6.2.i686.rpm, libvirt-devel-0.10.2-46.el6_6.2.x86_64.rpm, libvirt-lock-sanlock-0.10.2-46.el6_6.2.x86_64.rpm, libvirt-python-0.10.2-46.el6_6.2.i686.rpm, libvirt-python-0.10.2-46.el6_6.2.x86_64.rpm
CVE-2014-3633, CVE-2014-3657, CVE-2014-7823
rhn.redhat.com, lists.centos.org
2014-11-18
2017-07-27 19:08
Low CentOS libvirt Security Update
Moderate CentOS libvirt Security Update
CVE-2014-3633 libvirt
CVE-2014-3657 libvirt
CVE-2014-7823 libvirt
CVE-2014-7823
CVE-2014-3657
CVE-2014-3633
2017-04-01 19:08
2017-01-05 20:12

Description


Updated libvirt packages that fix three security issues and one bug are now
available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate 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.

The libvirt library is a C API for managing and interacting with the
virtualization capabilities of Linux and other operating systems.
In addition, libvirt provides tools for remote management of
virtualized systems.

An out-of-bounds read flaw was found in the way libvirt's
qemuDomainGetBlockIoTune() function looked up the disk index in a
non-persistent (live) disk configuration while a persistent disk
configuration was being indexed. A remote attacker able to establish a
read-only connection to libvirtd could use this flaw to crash libvirtd or,
potentially, leak memory from the libvirtd process. (CVE-2014-3633)

A denial of service flaw was found in the way libvirt's
virConnectListAllDomains() function computed the number of used domains.
A remote attacker able to establish a read-only connection to libvirtd
could use this flaw to make any domain operations within libvirt
unresponsive. (CVE-2014-3657)

It was found that when the VIR_DOMAIN_XML_MIGRATABLE flag was used, the
QEMU driver implementation of the virDomainGetXMLDesc() function could
bypass the restrictions of the VIR_DOMAIN_XML_SECURE flag. A remote
attacker able to establish a read-only connection to libvirtd could use
this flaw to leak certain limited information from the domain XML data.
(CVE-2014-7823)

The CVE-2014-3633 issue was discovered by Luyao Huang of Red Hat.

This update also fixes the following bug:

When dumping migratable XML configuration of a domain, libvirt removes some
automatically added devices for compatibility with older libvirt releases.
If such XML is passed to libvirt as a domain XML that should be used during
migration, libvirt checks this XML for compatibility with the internally
stored configuration of the domain. However, prior to this update, these
checks failed because of devices that were missing (the same devices
libvirt removed). As a consequence, migration with user-supplied migratable
XML failed. Since this feature is used by OpenStack, migrating QEMU/KVM
domains with OpenStack always failed. With this update, before checking
domain configurations for compatibility, libvirt transforms both
user-supplied and internal configuration into a migratable form
(automatically added devices are removed) and checks those instead. Thus,
no matter whether the user-supplied configuration was generated as
migratable or not, libvirt does not err about missing devices, and
migration succeeds as expected. (BZ#1155564)

All libvirt users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing the
updated packages, libvirtd will be restarted automatically.
Please see https://www.redhat.com/footer/terms-of-use.html

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

Or, you can just let us figure it out for you! Appcanary continously monitor your installed packages, and tell you if any of them are vulnerable.

Sign up for monitoring

Affected package information

Release Package Patched in
6 libvirt libvirt-0.10.2-46.el6_6.2.i686.rpm
libvirt libvirt-0.10.2-46.el6_6.2.src.rpm
libvirt libvirt-0.10.2-46.el6_6.2.x86_64.rpm
libvirt-client libvirt-client-0.10.2-46.el6_6.2.i686.rpm
libvirt-client libvirt-client-0.10.2-46.el6_6.2.x86_64.rpm
libvirt-devel libvirt-devel-0.10.2-46.el6_6.2.i686.rpm
libvirt-devel libvirt-devel-0.10.2-46.el6_6.2.x86_64.rpm
libvirt-lock-sanlock libvirt-lock-sanlock-0.10.2-46.el6_6.2.x86_64.rpm
libvirt-python libvirt-python-0.10.2-46.el6_6.2.i686.rpm
libvirt-python libvirt-python-0.10.2-46.el6_6.2.x86_64.rpm