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Red Hat Security Advisory
Synopsis: Moderate: libvirt security and bug fix update
Advisory ID: RHSA-2013:0831-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0831.html
Issue date: 2013-05-16
CVE Names: CVE-2013-1962
=====================================================================
1. Summary:
Updated libvirt packages that fix one security issue and two bugs are 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 Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64
3. Description:
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.
It was found that libvirtd leaked file descriptors when listing all volumes
for a particular pool. A remote attacker able to establish a read-only
connection to libvirtd could use this flaw to cause libvirtd to consume all
available file descriptors, preventing other users from using libvirtd
services (such as starting a new guest) until libvirtd is restarted.
(CVE-2013-1962)
Red Hat would like to thank Edoardo Comar of IBM for reporting this issue.
This update also fixes the following bugs:
* Previously, libvirt made control group (cgroup) requests on files that
it should not have. With older kernels, such nonsensical cgroup requests
were ignored; however, newer kernels are stricter, resulting in libvirt
logging spurious warnings and failures to the libvirtd and audit logs. The
audit log failures displayed by the ausearch tool were similar to the
following:
root [date] - failed cgroup allow path rw /dev/kqemu
With this update, libvirt no longer attempts the nonsensical cgroup
actions, leaving only valid attempts in the libvirtd and audit logs (making
it easier to search for real cases of failure). (BZ#958837)
* Previously, libvirt used the wrong variable when constructing audit
messages. This led to invalid audit messages, causing ausearch to format
certain entries as having "path=(null)" instead of the correct path.
This
could prevent ausearch from locating events related to cgroup device ACL
modifications for guests managed by libvirt. With this update, the audit
messages are generated correctly, preventing loss of audit coverage.
(BZ#958839)
All users of libvirt 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.
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/):
953107 - CVE-2013-1962 libvirt: DoS (max count of open files exhaustion) due
sockets leak in the storage pool
958837 - libvirt spams audit log with unneeded failures
958839 - Cgroup audit events with path are not escaped
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
i386:
libvirt-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-python-0.10.2-18.el6_4.5.i686.rpm
x86_64:
libvirt-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-python-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
i386:
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
x86_64:
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-lock-sanlock-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
x86_64:
libvirt-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-python-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
x86_64:
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-lock-sanlock-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
i386:
libvirt-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-python-0.10.2-18.el6_4.5.i686.rpm
ppc64:
libvirt-0.10.2-18.el6_4.5.ppc64.rpm
libvirt-client-0.10.2-18.el6_4.5.ppc.rpm
libvirt-client-0.10.2-18.el6_4.5.ppc64.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.ppc.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.ppc64.rpm
libvirt-devel-0.10.2-18.el6_4.5.ppc.rpm
libvirt-devel-0.10.2-18.el6_4.5.ppc64.rpm
libvirt-python-0.10.2-18.el6_4.5.ppc64.rpm
s390x:
libvirt-0.10.2-18.el6_4.5.s390x.rpm
libvirt-client-0.10.2-18.el6_4.5.s390.rpm
libvirt-client-0.10.2-18.el6_4.5.s390x.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.s390.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.s390x.rpm
libvirt-devel-0.10.2-18.el6_4.5.s390.rpm
libvirt-devel-0.10.2-18.el6_4.5.s390x.rpm
libvirt-python-0.10.2-18.el6_4.5.s390x.rpm
x86_64:
libvirt-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-python-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
x86_64:
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-lock-sanlock-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
i386:
libvirt-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-python-0.10.2-18.el6_4.5.i686.rpm
x86_64:
libvirt-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-client-0.10.2-18.el6_4.5.i686.rpm
libvirt-client-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.i686.rpm
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-devel-0.10.2-18.el6_4.5.i686.rpm
libvirt-devel-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-python-0.10.2-18.el6_4.5.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source:
libvirt-0.10.2-18.el6_4.5.src.rpm
x86_64:
libvirt-debuginfo-0.10.2-18.el6_4.5.x86_64.rpm
libvirt-lock-sanlock-0.10.2-18.el6_4.5.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-2013-1962.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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