Ubuntu Security Notice USN-1641-1
28th November, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
Keystone would allow unintended access to files over the network.
- keystone - OpenStack identity service
Vijaya Erukala discovered that Keystone did not properly invalidate
EC2-style credentials such that if credentials were removed from a tenant,
an authenticated and authorized user using those credentials may still be
allowed access beyond the account owner's expectations. (CVE-2012-5571)
It was discovered that Keystone did not properly implement token
expiration. A remote attacker could use this to continue to access an
account that is disabled or has a changed password. This issue was
previously fixed as CVE-2012-3426 but was reintroduced in Ubuntu 12.10.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- python-keystone 2012.2-0ubuntu1.2
- Ubuntu 12.04 LTS:
- python-keystone 2012.1+stable~20120824-a16a0ab9-0ubuntu2.3
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.