Samba from version 4.9.0 and before version 4.9.3 is vulnerable to a NULL pointer de-reference. During the processing of an DNS zone in the DNS management DCE/RPC server, the internal DNS server or the Samba DLZ plugin for BIND9, if the DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS property is set, the server will follow a NULL pointer and terminate. There is no further vulnerability associated with this issue, merely a denial of service.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-16852
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16852
• https://security.gentoo.org/glsa/202003-52
• https://security.netapp.com/advisory/ntap-20181127-0001/
• https://www.samba.org/samba/security/CVE-2018-16852.html
• http://www.securityfocus.com/bid/106024