Check Point Advisories

Microsoft Windows DNS Use After Free (MS15-127: CVE-2015-6125)

Check Point Reference: CPAI-2016-0207
Date Published: 16 Mar 2016
Severity: Critical
Last Updated: Thursday 17 March, 2016
Source: Microsoft MS15-127
Industry Reference:CVE-2015-6125
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Windows Server 2008
Windows Server 2008 R2
Windows Server 2012 and Windows Server 2012 R2
Server Core installation option
Vulnerability Description A remote code execution vulnerability exists in Windows DNS servers when they fail to properly parse requests. An attacker could create a specially crafted application to connect to a Windows DNS server and then issue malicious requests to the server. Successful exploitation of this vulnerability would lead to arbitrary code execution in the context of the Local System Account.
Update/Patch AvaliableApply patches from: MS15-127

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 Microsoft Windows DNS Use After Free (MS15-127: CVE-2015-6125) 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:  DNS Enforcement Violation.
Attack Information:  Microsoft Windows DNS Use After Free (MS15-127: CVE-2015-6125)

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