Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2013.0396
libvirt -bin security update
18 March 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: libvirt
Publisher: Debian
Operating System: Linux variants
Debian GNU/Linux 6
Windows
Impact/Access: Modify Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2013-1766
Original Bulletin:
http://www.debian.org/security/2013/dsa-2650
Comment: This bulletin contains two (2) Debian security advisories.
This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running libvirt check for an updated version of the software for
their operating system.
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Debian Security Advisory DSA-2650-1 security@debian.org
http://www.debian.org/security/ Yves-Alexis Perez
March 15, 2013 http://www.debian.org/security/faq
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Package : libvirt-bin
Vulnerability : files and device nodes ownership change to kvm group
Problem type : local
Debian-specific: yes
CVE ID : CVE-2013-1766
Debian Bug : 701649
Bastian Blank discovered that libvirtd, a daemon for management of virtual
machines, network and storage, would change ownership of devices files so they
would be owned by user `libvirt-qemu` and group `kvm`, which is a general
purpose group not specific to libvirt, allowing unintended write access to
those devices and files for the kvm group members.
For the stable distribution (squeeze), this problem has been fixed in
version 0.8.3-5+squeeze4.
For the testing distribution (wheezy), this problem has been fixed in
version 0.9.12-11.
For the unstable distribution (sid), this problem has been fixed in
version 0.9.12-11.
We recommend that you upgrade your libvirt-bin packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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Debian Security Advisory DSA-2650-2 security@debian.org
http://www.debian.org/security/ Yves-Alexis Perez
March 17, 2013 http://www.debian.org/security/faq
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Package : libvirt
Vulnerability : files and device nodes ownership change to kvm group
Problem type : local
Debian-specific: yes
CVE ID : CVE-2013-1766
Debian Bug : 701649
The recent security update for libvirt was found to cause a regression.
The kvm/qemu processes weren't run as the `kvm` user anymore in order to
fix the file/device ownership changes, but the processes where not
correctly configured to use the `kvm` group either. When the user would
try to run a virtual machine, the process was denied access to the
/dev/kvm device node, preventing the virtual machine to run.
For the stable distribution (squeeze), this problem has been fixed in
version 0.8.3-5+squeeze5.
We recommend that you upgrade your libvirt packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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