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[USN-3092-1] Samba vulnerability

Posted on 28 September 2016
Ubuntu Security

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Ubuntu Security Notice USN-3092-1
September 28, 2016

samba vulnerability
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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=
=2E
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 versions:

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

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:
http://www.ubuntu.com/usn/usn-3092-1
CVE-2016-2119

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04=
=2E1
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04=
=2E1



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