Check Point Advisories

Adobe Reader External Entity Declaration Cross-Site Scripting (APSB11-03; CVE-2011-0604)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-038
Date Published:	20 Feb 2011
Severity:	Critical
Last Updated:	Sunday 20 February, 2011
Source:
Industry Reference:	CVE-2011-0604
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description	Adobe Reader and Acrobat is a family of computer programs developed by Adobe Systems, designed to view, create, manipulate and manage files in Adobe's core technology, the Portable Document Format (PDF), a format that has become the de facto standard in the electronic document exchange. A cross-site scripting (XSS) vulnerability has been discovered in Adobe Reader and Acrobat. PDF files can contain external entity declarations, which by default, reference data that comes from the same source as the PDF file. A remote attacker could exploit this issue via a URL redirection trick that will allow him to bypass the domain restrictions. An attacker can set up a redirector on the server the PDF is hosted on and use the redirector to access data from arbitrary domains.

Protection Overview

This protection will detect and block the transferring of malformed PDF 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

In the IPS tab, click Protections and find the Adobe Reader External Entity Declaration Cross-Site Scripting (APSB11-03) 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: Adobe Reader Violation.
Attack Information: Adobe Reader External entity declaration cross-site scripting (APSB11-03)