USN-3242-2: Samba regression

Publication date

30 March 2017

Overview

USN-3242-1 introduced a regression in Samba.


Packages

  • 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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.10 yakkety samba –  2:4.4.5+dfsg-2ubuntu5.5
16.04 xenial samba –  2:4.3.11+dfsg-0ubuntu0.16.04.6
14.04 trusty samba –  2:4.3.11+dfsg-0ubuntu0.14.04.7
12.04 precise samba –  2:3.6.25-0ubuntu0.12.04.10

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