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Ubuntu 16.04 & 18.04 LTS: USN-3976-3 Samba Regression Fix

ubuntu
Calendar Grey May 27, 2019
Dist Ubuntu Esm H88
An issue with Samba identified by USN-3980-1 impacting Ubuntu 16.04 and 18.04 LTS versions has been resolved in this announcement.
USN-3976-1 introduced a regression in Samba.

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.

Topics%20covered

Topics Covered

security advisory security issue update samba Ubuntu regression

Update Instructions

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

Ubuntu 18.04 LTS:
  samba                           2:4.7.6+dfsg~ubuntu-0ubuntu2.11

Ubuntu 16.04 LTS:
  samba                           2:4.3.11+dfsg-0ubuntu0.16.04.21

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

References

https://ubuntu.com/security/notices/USN-3976-3

https://ubuntu.com/security/notices/USN-3976-1

https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1827924

Severity
important
Lowest
Low
Medium
High
Critical

May 27, 2019

Topics%20covered

Topics Covered

security advisory security issue update samba Ubuntu regression

Package Information

https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.11
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.21

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