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",
"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"
}
]
}