Check Point Advisories

Samba LDAP Server libldb Infinite Loop Denial of Service (CVE-2015-3223)

Check Point Reference: CPAI-2016-0281
Date Published: 11 Apr 2016
Severity: High
Last Updated: Wednesday 03 August, 2016
Source: Samba Project
Industry Reference:CVE-2015-3223
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Samba Team Samba 4.0.0 to 4.3.2
Vulnerability Description A denial-of-service vulnerability has been reported in the Samba LDAP server. The vulnerability is due to a error in processing certain LDAP requests by the libldb library used by the Samba daemon. A remote, authenticated attacker could exploit this vulnerability by sending malicious packets to cause the samba daemon to become unresponsive. Successful exploitation could lead to a denial-of-service and exhaustion of CPU resources.

Protection Overview

This protection will detect and block 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

  1. In the IPS tab, click Protections and find the Samba LDAP Server libldb Infinite Loop Denial of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  LDAP Protection Violation.
Attack Information:  Samba LDAP Server libldb Infinite Loop Denial of Service

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