python-keystoneclient before 0.2.4, as used in OpenStack Keystone (Folsom), does not properly check expiry for PKI tokens, which allows remote authenticated users to (1) retain use of a token after it has expired, or (2) use a revoked token once it expires.
CVSS Severity (version 2.0):
Impact Subscore: 4.9
Exploitability Subscore: 8.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Required to exploit
Impact Type: Allows unauthorized modification; Allows disruption of service
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[oss-security] 20130528 [OSSA 2013-014] Missing expiration check in Keystone PKI tokens validation (CVE-2013-2104)
Vulnerable software and versions