Check Point Advisories

Microsoft Windows Embedded OpenType Font Heap Buffer Overflow (MS09-029; CVE-2009-0231)

Check Point Reference: CPAI-2009-404
Date Published: 3 Feb 2010
Severity: High
Last Updated: Sunday 14 February, 2016
Source:
Industry Reference:CVE-2009-0231
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Embedded OpenType (EOT) fonts are a compact form of OpenType fonts designed by Microsoft for use as embedded fonts on web pages. These files usually use the extension ".eot". The Embedded OpenType (EOT) Font Engine is a Microsoft Windows component that enables Windows applications, such as Microsoft Internet Explorer, to utilize EOT font files. A heap buffer overflow vulnerability exists within Microsoft Windows Embedded OpenType (EOT) Font Engine. The vulnerability is due to insufficient bounds checking of certain OpenType font file records. A remote unauthenticated attacker can exploit this vulnerability by enticing a target user to visit a web page containing a reference to a malicious EOT file. In case of an attack where code injection and execution is successful, the behavior of the target will depend on the intention of the attacker. Any injected code will be executed within the security context of the currently logged in user. In case of an attack where code injection is not successful, the targeted application may terminate abnormally.

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 Embedded OpenType Font Heap Buffer Overflow (MS09-029) 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 Windows Embedded OpenType Font heap buffer overflow (MS09-029)

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