Ubuntu Security Notice USN-1730-1
20th February, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
Keystone could be made to crash or expose sensitive information over the network.
- keystone - OpenStack identity service
Nathanael Burton discovered that Keystone did not properly verify disabled
users. An authenticated but disabled user would continue to have access
rights that were removed. (CVE-2013-0282)
Jonathan Murray discovered that Keystone would allow XML entity processing.
A remote unauthenticated attacker could exploit this to cause a denial of
service via resource exhaustion. Authenticated users could also use this to
view arbitrary files on the Keystone server. (CVE-2013-1664, CVE-2013-1665)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- python-keystone 2012.2.1-0ubuntu1.2
- Ubuntu 12.04 LTS:
- python-keystone 2012.1+stable~20120824-a16a0ab9-0ubuntu2.5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.