Vulnerability CVE-2015-7546
Published: 2016-02-03

Description:
The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.

CVSS2 => (AV:N/AC:M/Au:S/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6/10
6.4/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Openstack -> Keystone 
Openstack -> Python-keystoneclient 

 References:
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
https://bugs.launchpad.net/keystone/+bug/1490804
https://security.openstack.org/ossa/OSSA-2016-005.html
https://wiki.openstack.org/wiki/OSSN/OSSN-0062
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