USN-3426-2: Samba vulnerabilities

Ubuntu Security Notice USN-3426-2

2nd November, 2017

samba vulnerabilities

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

  • Ubuntu 12.04 LTS


Several security issues were fixed in XXX-APP-XXX.

Software description

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


USN-3426-1 fixed several vulnerabilities in Samba. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in
certain situations. A remote attacker could use this issue to perform a man
in the middle attack. (CVE-2017-12150)

Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory
when SMB1 is being used. A remote attacker could possibly use this issue to
obtain server memory contents. (CVE-2017-12163)

Update instructions

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

Ubuntu 12.04 LTS:
samba 2:3.6.25-0ubuntu0.12.04.13

To update your system, please follow these instructions:

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


CVE-2017-12150, CVE-2017-12163