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CVE-2018-16852

Published: 27 November 2018

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.

Notes

AuthorNote
mdeslaur
4.9.x only

Priority

Medium

Cvss 3 Severity Score

4.4

Score breakdown

Status

Package Release Status
samba
Launchpad, Ubuntu, Debian
upstream
Released (4.9.3)
trusty Not vulnerable

xenial Not vulnerable

bionic Not vulnerable

cosmic Not vulnerable

Severity score breakdown

Parameter Value
Base score 4.4
Attack vector Network
Attack complexity High
Privileges required High
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H