ESB-2017.1758 - [Ubuntu] samba-libs: Access privileged data - Remote/unauthenticated 2017-07-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1758
                            Samba vulnerability
                               17 July 2017

===========================================================================

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

Product:           samba-libs
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-11103  

Reference:         ESB-2017.1741
                   ESB-2017.1756

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3353-2

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Ubuntu Security Notice USN-3353-2
July 14, 2017

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

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

- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

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.

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 servers or perform other attacks.

Update instructions:

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

Ubuntu 17.04:
  samba-libs                      2:4.5.8+dfsg-0ubuntu0.17.04.4

Ubuntu 16.10:
  samba-libs                      2:4.4.5+dfsg-2ubuntu5.8

Ubuntu 16.04 LTS:
  samba-libs                      2:4.3.11+dfsg-0ubuntu0.16.04.9

Ubuntu 14.04 LTS:
  samba-libs                      2:4.3.11+dfsg-0ubuntu0.14.04.10

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

References:
  https://www.ubuntu.com/usn/usn-3353-2
  https://www.ubuntu.com/usn/usn-3353-1
  CVE-2017-11103

Package Information:
  https://launchpad.net/ubuntu/+source/samba/2:4.5.8+dfsg-0ubuntu0.17.04.4
  https://launchpad.net/ubuntu/+source/samba/2:4.4.5+dfsg-2ubuntu5.8
  https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.9
  https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.10

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