system
Describe <CVE-2014-2828>.
user
What is <CVE-2014-2828>?
assistant
The V3 API in OpenStack Identity (Keystone) 2013.1 before 2013.2.4 and icehouse before icehouse-rc2 allows remote attackers to cause a denial of service (CPU consumption) via a large number of the same authentication method in a request, aka "authentication chaining.".