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MS11-028 - Critical: Vulnerability in .NET Framework Could Allow Remote Code Execution (2484015) - Version:2.0

Posted on 10 May 2011

There is an newer version: MS11-028 - Version: 2.4

Critical

Severity Rating: Critical - Revision Note: V2.0 (May 10, 2011): Bulletin rereleased to reoffer updates KB2446709 and KB2449742. This addresses a known issue with SQL and Exchange servers that have hotfix KB979744 installed.Summary: This security update resolves a publicly disclosed vulnerability in Microsoft .NET Framework. 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). 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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