Samba from version 4.7.0 has a vulnerability that allows a user in a Samba
AD domain to crash the KDC when Samba is built in the non-default MIT
Kerberos configuration. With this advisory the Samba Team clarify that the
MIT Kerberos build of the Samba AD DC is considered experimental. Therefore
the Samba Team will not issue security patches for this configuration.
Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been issued as security
releases to prevent building of the AD DC with MIT Kerberos unless
--with-experimental-mit-ad-dc is specified to the configure command.
mdeslaurUbuntu package is not built with MIT Kerberos
Source: samba (LP Ubuntu Debian)
Upstream:released (4.7.12,4.8.7,4.9.3)
Ubuntu 12.04 ESM (Precise Pangolin):not-affected
Ubuntu 14.04 ESM (Trusty Tahr):not-affected
Ubuntu 16.04 LTS (Xenial Xerus):not-affected
Ubuntu 18.04 LTS (Bionic Beaver):not-affected
More Information

Updated: 2020-09-10 05:54:21 UTC (commit 81a23a978c4436cd99e1d040e9e73e9146876281)