USN-3092-1: Samba vulnerability

Ubuntu Security Notice USN-3092-1

28th September, 2016

samba vulnerability

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

• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Samba could be tricked into connecting to impersonated servers.

Software description

• samba - SMB/CIFS file, print, and login server for Unix

Details

Stefan Metzmacher discovered that Samba incorrectly handled certain flags
in SMB2/3 client connections. A remote attacker could use this issue to
disable client signing and impersonate servers by performing a man in the
middle attack.

Samba has been updated to 4.3.11 in Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
In addition to the security fix, the updated packages contain bug fixes,
new features, and possibly incompatible changes.

Update instructions

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

Ubuntu 16.04 LTS:

samba 2:4.3.11+dfsg-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:

samba 2:4.3.11+dfsg-0ubuntu0.14.04.1

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

CVE-2016-2119

from Ubuntu Security Notices http://ift.tt/2d50Vg3