Several security issues were fixed in Samba.
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)
10 December 2019
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Samba.
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)
The problem can be corrected by updating your system to the following package versions:
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.