1. Ubuntu Security Notices
  2. USN-3976-1

USN-3976-1: Samba vulnerability

Publication date

14 May 2019

Overview

Samba could allow unintended access to network services.

Releases

Packages

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

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.

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
19.04 disco samba –  2:4.10.0+dfsg-0ubuntu2.1
18.10 cosmic samba –  2:4.8.4+dfsg-2ubuntu2.4
18.04 bionic samba –  2:4.7.6+dfsg~ubuntu-0ubuntu2.10
16.04 xenial samba –  2:4.3.11+dfsg-0ubuntu0.16.04.20

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›