Ubuntu 4217-1: Samba Security Advisory for Multiple Releases

ubuntu

December 10, 2019

Several security issues were fixed in Samba.

Summary

Several security issues were fixed in Samba.

Software Description:

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

Details:

Andreas Oster discovered that the Samba DNS management server incorrectly

handled certain records. An authenticated attacker could possibly use this

issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)

Isaac Boukris discovered that Samba did not enforce the Kerberos

DelegationNotAllowed feature restriction, contrary to expectations.

(CVE-2019-14870)

Topics Covered

security advisory denial of service security issue samba threat Ubuntu

Update Instructions

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

Ubuntu 19.10:
  libsmbclient                    2:4.10.7+dfsg-0ubuntu2.3
  samba                           2:4.10.7+dfsg-0ubuntu2.3

Ubuntu 19.04:
  libsmbclient                    2:4.10.0+dfsg-0ubuntu2.7
  samba                           2:4.10.0+dfsg-0ubuntu2.7

Ubuntu 18.04 LTS:
  libsmbclient                    2:4.7.6+dfsg~ubuntu-0ubuntu2.14
  samba                           2:4.7.6+dfsg~ubuntu-0ubuntu2.14

Ubuntu 16.04 LTS:
  libsmbclient                    2:4.3.11+dfsg-0ubuntu0.16.04.24
  samba                           2:4.3.11+dfsg-0ubuntu0.16.04.24

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