Check Point Advisories

Microsoft Windows Remote Assistance XXE Injection Information Disclosure (CVE-2018-0878)

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0178
Date Published:	20 Mar 2018
Severity:	Medium
Last Updated:	Tuesday 20 March, 2018
Source:	Microsoft
Industry Reference:	CVE-2018-0878
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Windows 7 Microsoft Windows 8.1 Microsoft Windows 10 Microsoft Windows RT 8.1 Microsoft Windows Server 2008 Microsoft Windows Server 2008 R2 Microsoft Windows Server 2012 Microsoft Windows Server 2012 R2 Microsoft Windows Server 2016 Microsoft Windows Server version 1709 (Server Core Installation)
Vulnerability Description	An XML external entity (XXE) injection vulnerability exist in the Remote Assistance component of Microsoft Windows. The vulnerability is due to a failure to properly handle external entity references in XML files. A remote attacker could exploit this vulnerability by enticing a target user into opening a crafted XML file with the Remote Assistance application when successful exploitation results in the disclosure of file contents from the target system.

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 Microsoft Windows Remote Assistance XXE Injection Information Disclosure (CVE-2018-0878) 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 Client Enforcement Violation.
Attack Information: Microsoft Windows Remote Assistance XXE Injection Information Disclosure (CVE-2018-0878)