Check Point Advisories

Microsoft Excel File Importing Code Execution (MS08-014; CVE-2008-0112)

Check Point Reference: CPAI-2008-265
Date Published: 14 Jun 2010
Severity: High
Last Updated: Tuesday 19 March, 2019
Industry Reference:CVE-2008-0112
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable?
Vulnerability Description Symbolic Link (SYLK) is a Microsoft file format typically used for the interchange of spreadsheet data between applications such as Microsoft Multiplan and Microsoft Excel. SYLK files conventionally have a .slk extension. From within a spreadsheet, data can be exported in the SYLK format. SYLK files are written entirely in ASCII and can be easily created and processed by other applications such as Microsoft Excel There exists a code execution vulnerability in Microsoft Excel. The vulnerability is due to an improper parsing of the SYLK-formatted file. A remote attacker can exploit this vulnerability by enticing the target user to open a crafted SYLK file, potentially causing arbitrary code to be injected and executed in the security context of the current user. In case of an attack where code injection and execution is successful, the behavior of the target will depend on the intented purpose of the injected code. Any code injected will be executed within the security context of the currently logged in user. In case of an unsuccessful code execution attack, Excel will terminate resulting in the loss of any unsaved data from the current session.

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 Excel File Importing Code Execution (MS08-014) 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:  Content Protection Violation.
Attack Information:  Microsoft Excel File Importing Code Execution (MS08-014)

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