CVE-2020-14383

A flaw was found in Samba's DNS server. This flaw allows an authenticated user to crash the RPC server. The RPC server, which also serves protocols other than the DNS server, is restarted after a short delay, however, an authenticated non-administrative attacker can cause a crash as soon as it returns. The Samba DNS server continues to operate, but many RPC services do not. The highest threat from this vulnerability is system availability.

This issue does not affect the version of samba as shipped with Red Hat Enterprise Linux 6, 7, 8 and Red Hat Gluster Storage 3 as it does not include support for Active Directory Domain Controller.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

The dnsserver task can be stopped by setting

'dcerpc endpoint servers = -dnsserver'

in the smb.conf and restarting Samba.