A flaw was found in samba versions from 4.9.0. During the processing of an DNS zone in the DNS management DCE/RPC server, if the DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS property is set, the server will follow a NULL pointer and terminate. This could lead to a Denial of Service attack.
External Reference: https://www.samba.org/samba/security/CVE-2018-16852.html
Acknowledgments: Name: The Samba Team Upstream: Fabrizio Faganello
Created samba tracking bugs for this issue: Affects: fedora-29 [bug 1654092]
Statement: This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux because there is no support for samba as Active Directory Domain Controller.