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Ubuntu Security Notice USN-3976-2

Ubuntu Security Notice USN-3976-2
Posted May 15, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3976-2 - USN-3976-1 fixed a vulnerability in Samba. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2018-16860
MD5 | 53301491a63cf9393f70191a62ca11c0

Ubuntu Security Notice USN-3976-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3976-2
May 14, 2019

samba vulnerability
==========================================================================

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Samba could allow unintended access to network services.

Software Description:
- 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.

Update instructions:

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

Ubuntu 14.04 ESM:
samba 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1

Ubuntu 12.04 ESM:
samba 2:3.6.25-0ubuntu0.12.04.18

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

References:
https://usn.ubuntu.com/usn/usn-3976-2
https://usn.ubuntu.com/usn/usn-3976-1
CVE-2018-16860

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