Check Point Advisories

Apple CUPS Text-to-PostScript texttops Filter Integer Overflow (CVE-2008-3640)

Check Point Reference: CPAI-2008-358
Date Published: 10 Jan 2010
Severity: High
Last Updated: Wednesday 09 January, 2019
Industry Reference:CVE-2008-3640
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable?
Vulnerability Description The Common Unix Printing System (CUPS) is a modular printing system for Unix-like operating systems that allows a computer to act as a print server. A computer running CUPS is a host that can accept print jobs from client computers, process them, and send them to the appropriate printer. There exists a integer overflow vulnerability in Apple's Common Unix Printing System (CUPS) distributed by multiple vendors. The vulnerability is due to a boundary error in the texttops application when calculating the page size used for storing PostScript data. A remote attacker can exploit this vulnerability to compromise a vulnerable system. In case of an attack where code injection is unsuccessful, the affected application will terminate abnormally. In case of a more sophisticated attack where code injection is successful, the behavior of the target is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of the affected service, with the privileges of the printer user, normally lp.

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 Apple CUPS Text-to-PostScript texttops Filter Integer Overflow 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:  Application Servers Protection Violation.
Attack Information:  Apple CUPS Text-to-PostScript texttops filter integer overflow

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