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OpenStack Security Advisory: 2013-012 CVE: CVE-2013-2096 Date: May 16, 2013 Title: Nova fails to verify image virtual size Reporter: Loganathan Parthipan Products: Nova Affects: All versions

Description: Loganathan Parthipan publicly reported a vulnerability in Nova. Nova did not implement checking for the virtual size of a qcow2 image used as ephemeral storage for instances. It is therefore possible for a user to create an image which has a large virtual size, but little data. Once the instance is created, the user can then proceed to fill the virtual disk, and consume all available disk on the host node file system.

Havana (development branch) fix: https://review.openstack.org/28717

Grizzly fix: https://review.openstack.org/28901

Folsom fix: https://review.openstack.org/29192

References: https://bugs.launchpad.net/nova/+bug/1177830 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2013-2096

Thanks, Michael Still OpenStack Vulnerability Management Team