XML.Signature.HMAC.Truncation.Authentication.Bypass

description-logoDescription

This indicates an attack attempt to exploit an authentication-bypass vulnerability in multiple products.
The vulnerability is caused by the improper way that the W3C XML Signature Syntax and Processing (XMLDsig) recommendation. It could allow an attacker to tamper with signed XML content without being detected.

affected-products-logoAffected Products

Microsoft .NET Framework 1.1 Service Pack 1
Microsoft .NET Framework 1.0 Service Pack 3
Microsoft .NET Framework 2.0 Service Pack 1
Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5 Service Pack 1
Microsoft .NET Framework 3.5.1
Other products may also be affected.

Impact logoImpact

Security Bypass: Remote attackers can bypass security checking of vulnerable systems.

recomended-action-logoRecommended Actions

Apply the patch, available from the vendor's web site:
http://www.microsoft.com/technet/security/Bulletin/MS10-041.mspx

Telemetry logoTelemetry

Coverage

IPS (Regular DB)
IPS (Extended DB)