USN-3976-1: Samba vulnerability

samba vulnerability

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

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

Samba could allow unintended access to network services.

Software Description

• 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.

Update instructions

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

Ubuntu 19.04

samba - 2:4.10.0+dfsg-0ubuntu2.1

Ubuntu 18.10

samba - 2:4.8.4+dfsg-2ubuntu2.4

Ubuntu 18.04 LTS

samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.10

Ubuntu 16.04 LTS

samba - 2:4.3.11+dfsg-0ubuntu0.16.04.20

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2018-16860

from Ubuntu Security Notices http://bit.ly/2Ys376o