from ${URL}: CVE: CVE-2013-4463, CVE-2013-4469 Date: October 31, 2013 Title: Potential Nova denial of service through compressed disk images Reporter: Bernhard M. Wiedemann (SUSE) & Pádraig Brady (Red Hat) Products: Nova Affects: All versions Description: Bernhard M. Wiedemann from SUSE reported a vulnerability in Nova's control of the size of disk images. By using malicious compressed qcow2 disk images, an authenticated user may consume large amounts of disk space for each image, potentially resulting in a Denial of Service attack on Nova compute nodes (CVE-2013-4463). While fixing this issue, Pádraig 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 (CVE-2013-4469). The provided fixes address both issues. Icehouse (development branch) fix: https://review.openstack.org/54765 Havana fix: https://review.openstack.org/54767 Grizzly fix: https://review.openstack.org/54768 References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4463 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4469 https://bugs.launchpad.net/nova/+bug/1206081 Regards, - -- Thierry Carrez OpenStack Vulnerability Management Team
CVE-2013-4497: http://seclists.org/oss-sec/2013/q4/207
CVE-2013-4469 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4469): OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use_cow_images is set to False, does not verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) by transferring an image with a large virtual size that does not contain a large amount of data from Glance. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.
all fixes in place nova-2013.1.4-r1.ebuild: "${FILESDIR}/CVE-2013-4463_4469-grizzly.patch" nova-2013.1.4-r1.ebuild: "${FILESDIR}/CVE-2013-4497-grizzly-1.patch" nova-2013.1.4-r1.ebuild: "${FILESDIR}/CVE-2013-4497-grizzly-2.patch" nova-2013.2-r2.ebuild: "${FILESDIR}/CVE-2013-4463_4469-havana.patch"
CVE-2013-4497 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4497): The XenAPI backend in OpenStack Compute (Nova) Folsom, Grizzly, and Havana before 2013.2 does not properly apply security groups (1) when resizing an image or (2) during live migration, which allows remote attackers to bypass intended restrictions.
