A null pointer dereference flaw was found in the Samba DNS Management server when used as an Active Directory Domain Controller. A remote attacker could use this flaw to cause a denial of service (application crash).
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.
Name: The Samba Team
Upstream: Fabrizio Faganello
Created samba tracking bugs for this issue:
Affects: fedora-29 [bug 1654092]
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.