Objavljena je revizija sigurnosnog upozorenja s oznakom MS11-051 koga je Microsoft prvotno objavio 14. lipnja 2011. Izvorno upozorenje opisuje nedostatak vezan uz Active Directory Certificate Services Web Enrollment, a koji može dovesti do stjecanja povećanih ovlasti na ranjivom sustavu te izvođenja XSS napada.

Microsoft Security Bulletin MS11-051 - Important
Vulnerability in Active Directory Certificate Services Web Enrollment Could Allow Elevation of Privilege (2518295)
Published: June 14, 2011 | Updated: June 15, 2011

Version: 1.1
General Information
Executive Summary

This security update resolves a privately reported vulnerability in Active Directory Certificate Services Web Enrollment. The vulnerability is a cross-site scripting (XSS) vulnerability that could allow elevation of privilege, enabling an attacker to execute arbitrary commands on the site in the context of the target user. An attacker who successfully exploited this vulnerability would need to send a specially crafted link and convince a user to click the link. In all cases, however, an attacker would have no way to force a user to visit the Web site. Instead, an attacker would have to persuade a user to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes the user to the vulnerable Web site.

This security update is rated Important for all supported editions, except Itanium, of Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting the manner in which the Active Directory Certificate Services Web Enrollment site validates input parameters. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. The majority of customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. Microsoft Knowledge Base Article 2518295 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues.
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Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software
Operating System	Maximum Security Impact	Aggregate Severity Rating	Bulletins Replaced by this Update

Windows Server 2003 Service Pack 2
	

Elevation of Privilege
	

Important
	

None

Windows Server 2003 x64 Edition Service Pack 2
	

Elevation of Privilege
	

Important
	

None

Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2**
	

Elevation of Privilege
	

Important
	

None

Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2**
	

Elevation of Privilege
	

Important
	

None

Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1**
	

Elevation of Privilege
	

Important
	

None

**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

Non-Affected Software
Operating System

Windows XP Service Pack 3

Windows XP Professional x64 Edition Service Pack 2

Windows Server 2003 with SP2 for Itanium-based Systems

Windows Vista Service Pack 1 and Windows Vista Service Pack 2

Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2

Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2

Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1

Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1

Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
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Frequently Asked Questions (FAQ) Related to This Security Update
Vulnerability Information
	
Severity Ratings and Vulnerability Identifiers
	
Active Directory Certificate Services Vulnerability - CVE-2011-1264
Update Information
	
Detection and Deployment Tools and Guidance
	
Security Update Deployment
Other Information
Acknowledgments

Microsoft thanks the following for working with us to help protect customers:
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