Check Point Advisories

Microsoft Office Excel Parsed Expression Information Disclosure (CVE-2018-8246)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-0280
Date Published:	17 Feb 2019
Severity:	High
Last Updated:	Wednesday 30 October, 2019
Source:
Industry Reference:	CVE-2018-8246
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Excel 2010 Service Pack 2 Microsoft Excel 2013 RT Service Pack 1 Microsoft Excel 2013 Service Pack 1 Microsoft Excel 2016 Microsoft Excel Viewer Microsoft Office 2010 Service Pack 2 Microsoft Office 2016 Click-to-Run Microsoft Office Compatibility Pack Service Pack 3
Vulnerability Description	An information disclosure vulnerability exists in Microsoft Office Excel. The vulnerability is due to the inclusion of uninitialized memory when processing of parsed expressions in FORMULA records in Excel workbooks. Successful exploitation would allow the attacker to disclose sensitive information that may help in further attacks.

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 Office Excel Parsed Expression Information Disclosure (CVE-2018-8246) 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: Content Protection Violation.
Attack Information: Microsoft Office Excel Parsed Expression Information Disclosure (CVE-2018-8246)