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OpenStack Security Advisory: 2013-017 CVE: CVE-2013-2166, CVE-2013-2167 Date: June 19, 2013 Title: Issues in Keystone middleware memcache signing/encryption feature Reporter: Paul McMillan (Nebula) Products: python-keystoneclient Affects: version 0.2.3 to 0.2.5

Description: Paul McMillan from Nebula reported multiple issues in the implementation of memcache signing/encryption feature in Keystone client middleware. An attacker with direct write access to the memcache backend (or in a man-in-the-middle position) could insert malicious data and potentially bypass the encryption (CVE-2013-2166) or signing (CVE-2013-2167) security strategy that was specified. Only setups that make use of memcache caching in the Keystone middleware (specify memcache_servers) and using ENCRYPT or MAC as their memcache_security_strategy are affected.

python-keystoneclient fix (will be included in upcoming 0.2.6 release): https://review.openstack.org/#/c/33661

References: https://bugs.launchpad.net/python-keystoneclient/+bug/1175367 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2166 https://bugs.launchpad.net/python-keystoneclient/+bug/1175368 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2167

- -- Thierry Carrez (ttx) OpenStack Vulnerability Management Team