ESB-2017.1818 - [Ubuntu] samba: Access privileged data - Existing account 2017-07-25

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1818
                            Samba vulnerability
                               25 July 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           samba
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-11103  

Reference:         ESB-2017.1756

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3353-4

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Ubuntu Security Notice USN-3353-4
July 24, 2017

samba vulnerability
==========================================================================

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

- - Ubuntu 12.04 ESM

Summary:

Samba could allow unintended access to network services.

Software Description:
- - samba: SMB/CIFS file, print, and login server for Unix

Details:

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

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

References:
  https://www.ubuntu.com/usn/usn-3353-4
  https://www.ubuntu.com/usn/usn-3353-1
  CVE-2017-11103

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