USN-2034-1: OpenStack Keystone vulnerability

Ubuntu Security Notice USN-2034-1

25th November, 2013

keystone vulnerability

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

  • Ubuntu 13.10
  • Ubuntu 13.04
  • Ubuntu 12.10

Summary

Keystone would improperly remove roles when it was configured to use the LDAP backend.

Software description

  • keystone - OpenStack identity service

Details

Brant Knudson discovered a logic error in the LDAP backend in Keystone
where removing a role on a tenant for a user who does not have that role
would instead add the role to the user. An authenticated user could use
this to gain privileges. Ubuntu is not configured to use the LDAP Keystone
backend by default.

Update instructions

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

Ubuntu 13.10:
python-keystone 1:2013.2-0ubuntu1.1
Ubuntu 13.04:
python-keystone 1:2013.1.4-0ubuntu1.1
Ubuntu 12.10:
python-keystone 2012.2.4-0ubuntu3.3

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.

References

CVE-2013-4477