OpenStack Keystone Essex (2012.1) and Folsom (2012.2) does not properly handle EC2 tokens when the user role has been removed from a tenant, which allows remote authenticated users to bypass intended authorization restrictions by leveraging a token for the removed user role.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-5571
• openstack/keystone@37308dd
• openstack/keystone@8735009
• openstack/keystone@9d68b40
• https://bugs.launchpad.net/keystone/+bug/1064914
• https://exchange.xforce.ibmcloud.com/vulnerabilities/80333
• http://lists.fedoraproject.org/pipermail/package-announce/2012-December/094286.html
• http://rhn.redhat.com/errata/RHSA-2012-1556.html
• http://rhn.redhat.com/errata/RHSA-2012-1557.html
• http://secunia.com/advisories/51423
• http://secunia.com/advisories/51436
• http://www.openwall.com/lists/oss-security/2012/11/28/5
• http://www.openwall.com/lists/oss-security/2012/11/28/6
• http://www.securityfocus.com/bid/56726
• http://www.ubuntu.com/usn/USN-1641-1