5.5 - USN-1875-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.04 - Ubuntu 12.10

Summary:

Keystone did not always properly verify expired PKI tokens or properly authenticate users.

Software Description: - keystone: OpenStack identity service

Details:

Eoghan Glynn and Alex Meade discovered that Keystone did not properly perform expiry checks for the PKI tokens used in Keystone. If Keystone were setup to use PKI tokens, a previously authenticated user could continue to use a PKI token for longer than intended. This issue only affected Ubuntu 12.10 which does not use PKI tokens by default. (CVE-2013-2104)

Jose Castro Leon discovered that Keystone did not properly authenticate users when using the LDAP backend. An attacker could obtain valid tokens and impersonate other users by supplying an empty password. By default, Ubuntu does not use the LDAP backend. (CVE-2013-2157)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 13.04:
python-keystone 1:2013.1.1-0ubuntu2.1

Ubuntu 12.10:
python-keystone 2012.2.4-0ubuntu3.1

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1875-1
CVE-2013-2104, CVE-2013-2157

Package Information:
https://launchpad.net/ubuntu/+source/keystone/1:2013.1.1-0ubuntu2.1
https://launchpad.net/ubuntu/+source/keystone/2012.2.4-0ubuntu3.1