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Red Hat Enterprise Linux 6: RHSA-2013:0199-01 Critical libvirt RCE Alert

red hat
Calendar Grey January 28, 2013
Scroller Redhat
Urgent patch released for libvirt in Red Hat Enterprise Linux 6 mitigates a security flaw that could lead to unauthorized code execution from a distance.
Updated libvirt packages that fix one security issue are now available for Red Hat Enterprise Linux 6

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/articles/11258

Summary

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.
A flaw was found in the way libvirtd handled connection cleanup (when a connection was being closed) under certain error conditions. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, execute arbitrary code with the privileges of the root user. (CVE-2013-0170)
This issue was discovered by Tingting Zheng of Red Hat.
All users of libvirt are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, libvirtd will be restarted automatically.

Topics%20covered

Topics Covered

security advisory security issue red hat software update remote code execution important libvirt

References

https://access.redhat.com/security/cve/CVE-2013-0170 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: libvirt-0.9.10-21.el6_3.8.i686.rpm libvirt-client-0.9.10-21.el6_3.8.i686.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm libvirt-python-0.9.10-21.el6_3.8.i686.rpm
x86_64: libvirt-0.9.10-21.el6_3.8.x86_64.rpm libvirt-client-0.9.10-21.el6_3.8.i686.rpm libvirt-client-0.9.10-21.el6_3.8.x86_64.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.x86_64.rpm libvirt-python-0.9.10-21.el6_3.8.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm libvirt-devel-0.9.10-21.el6_3.8.i686.rpm
x86_64: libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.x86_64.rpm libvirt-devel-0.9.10-21.el6_3.8.i686.rpm libvirt-devel-0.9.10-21.el6_3.8.x86_64.rpm libvirt-lock-sanlock-0.9.10-21.el6_3.8.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: libvirt-0.9.10-21.el6_3.8.x86_64.rpm libvirt-client-0.9.10-21.el6_3.8.i686.rpm libvirt-client-0.9.10-21.el6_3.8.x86_64.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm libvirt-debuginfo-0.9.10-21.el6_3.8.x86_64.rpm libvirt-python-0.9.10-21.el6_3.8.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: libvirt-debuginfo-0.9.10-21.el6_3.8.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2013:0199-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0199.html
Issue date: 2013-01-28

Topic

Updated libvirt packages that fix one security issue are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory security issue red hat software update remote code execution important libvirt

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

Bugs Fixed

893450 - CVE-2013-0170 libvirt: use-after-free in virNetMessageFree()

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