MS11-031 - Critical : Vulnerability in JScript and VBScript Scripting Engines Could Allow Remote Cod


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Severity Rating: Critical
Revision Note: V1.1 (April 20, 2011): Bulletin updated to clarify that the JScript 5.8 and VBScript 5.8 update (KB2510531) also replaces MS09-045, in addition to MS10-022, for all supported editions of Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008.
Summary: This security update resolves a privately reported vulnerability in the JScript and VBScript scripting engines. The vulnerability could allow remote code execution if a user visited a specially crafted Web site. An attacker would have no way to force users to visit the Web site. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker's Web site.


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