Check Point Advisories

Microsoft .NET XML Digital Signature Spoofing (MS13-040; CVE-2013-1336)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-1821
Date Published:	14 May 2013
Severity:	High
Last Updated:	Wednesday 08 January, 2025
Source:	CVE-2013-1336
Protection Provided by:	Security Gateway R70 R71 R75
Who is Vulnerable?	Microsoft .NET Framework 2.0 Service Pack 2 Microsoft .NET Framework 3.5 Microsoft .NET Framework 3.5.1 Microsoft .NET Framework 4 Microsoft .NET Framework 4.5
Vulnerability Description	A spoofing vulnerability has been reported when the Microsoft .NET Framework fails to properly validate the signature of specially crafted XML files. Successful exploitation would allow an attacker to modify the contents of an XML file without invalidating the signature associated with the file.
Update/Patch Avaliable	Apply patches from: MS13-040

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, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

In the IPS tab, click Protections and find the Microsoft .NET XML Digital Signature Spoofing (MS13-040) protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Content Protection Violation
Attack Information: Microsoft .NET XML Digital Signature Spoofing (MS13-040)