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List:       ubuntu-security-announce
Subject:    [USN-3242-2] Samba regression
From:       Marc Deslauriers <marc.deslauriers () canonical ! com>
Date:       2017-03-30 18:28:56
Message-ID: f2ee1407-3103-4652-3fcb-a31f0af95dac () canonical ! com
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==========================================================================
Ubuntu Security Notice USN-3242-2
March 30, 2017

samba regression
==========================================================================

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

USN-3242-1 introduced a regression in Samba.

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

Details:

USN-3242-1 fixed a vulnerability in Samba. The upstream fix introduced a
regression when Samba is configured to disable following symbolic links.

This update fixes the problem.

Original advisory details:

 Jann Horn discovered that Samba incorrectly handled symlinks. An
 authenticated remote attacker could use this issue to access files on the
 server outside of the exported directories.

Update instructions:

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

Ubuntu 16.10:
  samba                           2:4.4.5+dfsg-2ubuntu5.5

Ubuntu 16.04 LTS:
  samba                           2:4.3.11+dfsg-0ubuntu0.16.04.6

Ubuntu 14.04 LTS:
  samba                           2:4.3.11+dfsg-0ubuntu0.14.04.7

Ubuntu 12.04 LTS:
  samba                           2:3.6.25-0ubuntu0.12.04.10

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

References:
  http://www.ubuntu.com/usn/usn-3242-2
  http://www.ubuntu.com/usn/usn-3242-1
  https://launchpad.net/bugs/1675698

Package Information:
  https://launchpad.net/ubuntu/+source/samba/2:4.4.5+dfsg-2ubuntu5.5
  https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.6
  https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.7
  https://launchpad.net/ubuntu/+source/samba/2:3.6.25-0ubuntu0.12.04.10



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