[USN-4217-1] Samba vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Tue Dec 10 13:21:48 UTC 2019

Ubuntu Security Notice USN-4217-1
December 10, 2019

samba vulnerabilities

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

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS


Several security issues were fixed in Samba.

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


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.

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.

  CVE-2019-14861, CVE-2019-14870

Package Information:

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