USN-3353-4: Samba vulnerability

24 July 2017

samba vulnerability

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

  • Ubuntu 12.04 ESM


Samba could allow unintended access to network services.

Software Description

  • samba - 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.

Update instructions

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

Ubuntu 12.04 ESM
libsmbclient - 2:3.6.25-0ubuntu0.12.04.12

To update your system, please follow these instructions:

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