Check Point Advisories

Samba AD DC Null Pointer Dereference (CVE-2018-1140)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-0037
Date Published:	13 Jan 2019
Severity:	Critical
Last Updated:	Sunday 27 January, 2019
Source:
Industry Reference:	CVE-2018-1140
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Samba
Vulnerability Description	A null pointer dereference vulnerability exists in Samba. The vulnerability is due to insufficient validation of DNS requests when Samba is operating as an Active Directory Domain Controller. Successful exploitation results in a crash leading to denial of service conditions.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Samba AD DC Null Pointer Dereference protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Samba AD DC Null Pointer Dereference