=============================================================== OSSA-2016-003: Heat denial of service through template-validate ===============================================================

:Date: January 19, 2016 :CVE: CVE-2015-5295

Affects ~~~~~~~ - Heat: <=2015.1.2, ==5.0.0

Description ~~~~~~~~~~~ Steven Hardy from Red Hat reported a vulnerability in Heat template validation. By referencing a local file like /dev/zero, an authenticated user may trick the heat engine service to load arbitrary local file content resulting in a Denial of Service attack through memory exhaustion. Note that the file content is not written back to the user, though the user can determine if a file exists and if it is readable by heat-engine. All Heat setups are affected.

Patches ~~~~~~~ - https://review.openstack.org/269692 (Kilo) - https://review.openstack.org/269691 (Liberty) - https://review.openstack.org/269689 (Mitaka)

Credits ~~~~~~~ - Steven Hardy from Red Hat (CVE-2015-5295)

References ~~~~~~~~~~ - https://bugs.launchpad.net/bugs/1496277 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5295

Notes ~~~~~ - This fix will be included in future 2015.1.3 (kilo) and 5.0.1 (liberty) releases.

-- Tristan Cacqueray OpenStack Vulnerability Management Team