Summary
This host is missing a critical security update according to Microsoft Bulletin MS10-041.
Impact
Successful exploitation will allow the attackers to forge an XML signature that will be accepted as valid or to bypass security restrictions.
Impact Level: System/Application.
Solution
Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://technet.microsoft.com/en-us/security/bulletin/MS10-041
Insight
The issue is caused by an error in the XML Signature Syntax and Processing (XMLDsig) implementation that rely on the 'HMACOutputLength' parameter to determine the number of bytes of the signature to be verified.
Affected
Microsoft .NET Framework 3.5/SP 1
Microsoft .NET Framework 1.1 SP 1
Microsoft .NET Framework 1.0 SP 3
Microsoft .NET Framework 2.0 SP 1/SP 2
References
Severity
Classification
-
CVE CVE-2009-0217 -
CVSS Base Score: 5.0
AV:N/AC:L/Au:N/C:N/I:P/A:N
Related Vulnerabilities
- Microsoft .NET Framework Information Disclosure Vulnerability (2567951)
- Microsoft AntiXSS Library Information Disclosure Vulnerability (2607664)
- Microsoft Windows IP-HTTPS Component Security Feature Bypass Vulnerability (2765809)
- Microsoft SharePoint Server HTML Sanitisation Component XSS Vulnerability (2821818)
- Microsoft IIS Malformed File Extension Denial of Service Vulnerability