OpenStack Keystone, as used in OpenStack Folsom 2012.2, does not properly implement token expiration, which allows remote authenticated users to bypass intended authorization restrictions by creating new tokens through token chaining. NOTE: this issue exists because of a CVE-2012-3426 regression.
https://github.com/openstack/keystone/commit/f9d4766249a72d8f88d75dcf1575b28dd3496681
https://github.com/openstack/keystone/commit/38c7e46a640a94da4da89a39a5a1ea9c081f1eb5
https://exchange.xforce.ibmcloud.com/vulnerabilities/80370
https://bugs.launchpad.net/keystone/+bug/1079216
http://www.ubuntu.com/usn/USN-1641-1
http://www.securityfocus.com/bid/56727
http://www.openwall.com/lists/oss-security/2012/11/28/6
http://www.openwall.com/lists/oss-security/2012/11/28/5
http://secunia.com/advisories/51436