Ubuntu Security Notices
USN-3976-2

USN-3976-2: Samba vulnerability

Publication date

14 May 2019

Overview

Samba could allow unintended access to network services.

Releases

14.04 LTS 12.04

Packages

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

Details

USN-3976-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.

USN-3976-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.

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
14.04 trusty	samba – 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1
12.04 precise	samba – 2:3.6.25-0ubuntu0.12.04.18

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References

CVE-2018-16860

CVE-2018-16860