USN-3976-3: Samba regression

USN-3976-3: Samba regression

samba regression

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

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

USN-3976-1 introduced a regression in Samba.

Software Description

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

Details

USN-3976-1 fixed a vulnerability in Samba. The update introduced a
regression causing Samba to occasionally crash. This update fixes the
problem.

We apologize for the inconvenience.

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 18.04 LTS
samba2:4.7.6+dfsg~ubuntu-0ubuntu2.11
Ubuntu 16.04 LTS
samba2:4.3.11+dfsg-0ubuntu0.16.04.21

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

Source: USN-3976-3: Samba regression

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