Ubuntu Security Notice USN-3353-4
24th July, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 12.04 LTS
Samba could allow unintended access to network services.
– SMB/CIFS file, print, and login server for Unix
USN-3353-1 fixed a vulnerability in Heimdal. This update provides the corresponding update for Samba.
Original advisory details:
Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered
that Samba clients incorrectly trusted unauthenticated portions
of Kerberos tickets. A remote attacker could use this to impersonate
trusted network services or perform other attacks.
The problem can be corrected by updating your system to the following
To update your system, please follow these instructions:
In general, a standard system update will make all the necessary changes.