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MS11-100 - Critical : Vulnerabilities in .NET Framework Could Allow Elevation of Privilege (2638420) - Version: 1.3

Posted on 02 February 2012

There is an newer version: MS11-100 - Version: 1.6

Critical

Severity Rating: Critical
Revision Note: V1.3 (February 1, 2012): Corrected registry keys and installation switches in the deployment tables for Windows Server 2003 and Windows Server 2008, and installation switches in the deployment table for Windows Vista. This is an informational change only. There were no changes to the security update files or detection logic.
Summary: This security update resolves one publicly disclosed vulnerability and three privately reported vulnerabilities in Microsoft .NET Framework. The most severe of these vulnerabilities could allow elevation of privilege if an unauthenticated attacker sends a specially crafted web request to the target site. An attacker who successfully exploited this vulnerability could take any action in the context of an existing account on the ASP.NET site, including executing arbitrary commands. In order to exploit this vulnerability, an attacker must be able to register an account on the ASP.NET site, and must know an existing user name.

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