The notifier middleware in OpenStack PyCADF 0.5.0 and earlier, Telemetry (Ceilometer) 2013.2 before 2013.2.4 and 2014.x before 2014.1.2, Neutron 2014.x before 2014.1.2 and Juno before Juno-2, and Oslo allows remote authenticated users to obtain X_AUTH_TOKEN values by reading the message queue (v2/meters/http.request).
http://www.ubuntu.com/usn/USN-2311-1
http://www.securityfocus.com/bid/68149
http://www.openwall.com/lists/oss-security/2014/06/25/6
http://www.openwall.com/lists/oss-security/2014/06/24/6
http://www.openwall.com/lists/oss-security/2014/06/23/8
http://secunia.com/advisories/60766
http://secunia.com/advisories/60736