CVE-2012-3371

The Nova scheduler in OpenStack Compute (Nova) Folsom (2012.2) and Essex
(2012.1), when DifferentHostFilter or SameHostFilter is enabled, allows
remote authenticated users to cause a denial of service (excessive database
lookup calls and server hang) via a request with many repeated IDs in the
os:scheduler_hints section.
Dan Prince from Red Hat reported a vulnerability in Nova scheduler
nodes. By creating servers with malicious scheduler_hints, an
authenticated user may generate a huge amount of database calls,
potentially resulting in a Denial of Service attack against Nova
scheduler nodes. Only setups exposing the OpenStack API and enabling
DifferentHostFilter and/or SameHostFilter are affected.

Notes