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MS11-078 - Critical : Vulnerability in .NET Framework and Microsoft Silverlight Could Allow Remote Code Execution (2604930) - Version: 1.0

Posted on 11 October 2011

There is an newer version: MS11-078 - Version: 1.3

Critical

Severity Rating: Critical
Revision Note: V1.0 (October 11, 2011): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft .NET Framework and Microsoft Silverlight. The vulnerability could allow remote code execution on a client system if a user views a specially crafted Web page using a Web browser that can run XAML Browser Applications (XBAPs) or Silverlight applications. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. The vulnerability could also allow remote code execution on a server system running IIS, if that server allows processing ASP.NET pages and an attacker succeeds in uploading a specially crafted ASP.NET page to that server and then executes the page, as could be the case in a Web hosting scenario. This vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions.

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