The template-validate command in OpenStack Orchestration API (Heat) before 2015.1.3 (kilo) and 5.0.x before 5.0.1 (liberty) allows remote authenticated users to cause a denial of service (memory consumption) or determine the existence of local files via the resource type in a template, as demonstrated by file:///dev/zero.
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "heat-api" }, { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "heat-api-cfn" }, { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "heat-api-cloudwatch" }, { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "heat-common" }, { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "heat-engine" }, { "binary_version": "1:6.0.0~b1-0ubuntu1", "binary_name": "python-heat" } ] }