OpenStack Compute (Nova) Folsom, Grizzly, and Havana does not properly verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) via a compressed QCOW2 image. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.

References

• https://nvd.nist.gov/vuln/detail/CVE-2013-4463
• https://bugs.launchpad.net/nova/+bug/1206081
• http://rhn.redhat.com/errata/RHSA-2014-0112.html
• http://www.openwall.com/lists/oss-security/2013/10/31/3
• http://www.ubuntu.com/usn/USN-2247-1
• http://github.com/openstack/nova/commit/3cdfe894ab58f7b91bf7fb690fc5bc724e44066f
• http://github.com/openstack/nova/commit/f6810be4ae1a6c93e7d8017ee67d5344dfdf4a30