Thierry Carrez of the OpenStack project reports: Title: Potential Nova denial of service through compressed disk images Reporter: Pedraig Brady from Red Hat Products: Nova Affects: All versions Description: Pedraig Brady from Red Hat additionally discovered that OSSA 2013-012 did not fully address CVE-2013-2096 in the non-default case where use_cow_images=False, and malicious qcow images are being transferred from Glance. In that specific case, an authenticated user could still consume large amounts of disk space for each instance using the malicious image, potentially also resulting in a Denial of Service attack on Nova compute nodes. The provided fixes address both issues. This issue was CVE SPLIT, please see Bz1023239 for the patches for this issue.
Statement: The Red Hat Security Response Team has rated this issue as having moderate security impact. This issue only affects systems that implemented the fix for CVE-2013-2096 (Bz963462) which fails to completely address the problem. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
openstack-nova-2013.1.4-3.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
openstack-nova-2013.2-4.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.