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[OSSA 2012-020] Information leak in libvirt LVM-backed instances (CVE-2012-5625)
From: Thierry Carrez <thierry () openstack org>
Date: Tue, 11 Dec 2012 19:52:05 +0100

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OpenStack Security Advisory: 2012-020
CVE: CVE-2012-5625
Date: December 11, 2012
Title: Information leak in libvirt LVM-backed instances
Reporter: Eric Windisch (Cloudscaling)
Products: Nova
Affects: Folsom, Grizzly

Description:
Eric Windisch from Cloudscaling reported a vulnerability in libvirt
LVM-backed instances. The physical volume content was not wiped out
before being reallocated and passed to an instance, which may result in
the disclosure of information from previously-allocated logical volumes.
Only setups using libvirt and LVM-backed instances
(libvirt_images_type=lvm) are affected.

Grizzly (development branch) fix:
http://github.com/openstack/nova/commit/9d2ea970422591f8cdc394001be9a2deca499a5f

Folsom fix (included in upcoming Nova 2012.2.2 stable update):
http://github.com/openstack/nova/commit/a99a802e008eed18e39fc1d98170edc495cbd354

References:
https://bugs.launchpad.net/nova/+bug/1070539
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2012-5625

- -- 
Thierry Carrez (ttx)
OpenStack Vulnerability Management Team
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