Check Point Advisories

SYLK Files (CVE-2008-0112)

Check Point Reference: SBP-2008-04
Date Published: 11 Mar 2008
Severity: N/A
Last Updated: Tuesday 11 March, 2008
Source:
Industry Reference:CVE-2008-0112
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description Symbolic Link (SYLK) is a Microsoft file format typically used for exchanging data between applications, particularly spreadsheets. SYLK files conventionally have a .slk suffix. The vulnerability is due to an error in Microsoft Excel that fails to sufficiently validate file data when importing a file into Excel. An attacker can exploit this flaw via a specially crafted SYLK file. Successful exploitation of this issue may allow a remote attacker to execute arbitrary code on a target system. There are cases in which certain traffic, although not intended for malicious use, is very unsafe, since it may transfer shellcode which is undetectable by IPS.

Protection Overview

This protection will detect and block the transferring of SYLK files over HTTP.

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 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the SYLK Files 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:  SYLK file

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