Check Point Advisories

Samba NDR Parsing ndr_pull_dnsp_name Integer Overflow (CVE-2016-2123)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0065
Date Published:	25 Jan 2017
Severity:	High
Last Updated:	Wednesday 01 February, 2017
Source:	Samba
Industry Reference:	CVE-2016-2123
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Samba Team Samba 4.3.x prior to 4.3.13 Samba Team Samba 4.4.x prior to 4.4.8 Samba Team Samba 4.5.x prior to 4.5.3
Vulnerability Description	An integer overflow vulnerability exists in Samba. The vulnerability is due to incorrectly parsing crafted NDR data that results in an integer overflow. A remote, authenticated attacker could exploit this vulnerability by sending malicious packets to a vulnerable Samba service and could result in arbitrary code execution or to cause the service to terminate or stop responding.

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 NDR Parsing ndr_pull_dnsp_name Integer Overflow 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: LDAP Protection Violation.
Attack Information: Samba NDR Parsing ndr_pull_dnsp_name Integer Overflow