Objavljena je revizija sigurnosne preporuke oznake MS12-036 objavljene 13. lipnja 2012. godine. Izvorna preporuka upozoravala je na sigurnosni propust otkriven u radu RDP protokola za operacijske sustave Microsoft Windows. Spomenuti nedostatak zloćudni korisnik može iskoristiti za DoS (eng. Denial of Service) napad te proizvoljno pokretanje programskog koda.

Microsoft Security Bulletin MS12-036 - Critical
Vulnerability in Remote Desktop Could Allow Remote Code Execution (2685939)

Published: Tuesday, June 12, 2012 | Updated: Wednesday, June 13, 2012

Version: 1.1
General Information
Executive Summary

This security update resolves a privately reported vulnerability in the Remote Desktop Protocol. The vulnerability could allow remote code execution if an attacker sends a sequence of specially crafted RDP packets to an affected system. By default, the Remote Desktop Protocol (RDP) is not enabled on any Windows operating system. Systems that do not have RDP enabled are not at risk.

This security update is rated Critical for all supported editions of Windows Server 2003 and Windows Server 2008; Critical for Windows 7 for 32-bit Systems Service Pack 1 and Windows 7 for x64-based Systems Service Pack 1; and Critical for all supported editions of Windows Server 2008 R2. The security update is also rated Moderate for all supported editions of Windows XP and Windows Vista, and Moderate for Windows 7 for 32-bit Systems and Windows 7 for x64-based Systems. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by modifying the way that the Remote Desktop Protocol processes packets in memory. 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 immediately 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. None
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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 XP Service Pack 3
(KB2685939)	Denial of Service	Moderate	KB2570222 in MS11-065 and KB2621440 in MS12-020 replaced by KB2685939
Windows XP Professional x64 Edition Service Pack 2
(KB2685939)	Denial of Service	Moderate	KB2570222 in MS11-065 and KB2621440 in MS12-020 replaced by KB2685939
Windows Server 2003 Service Pack 2
(KB2685939)	Remote Code Execution	Critical	KB2570222 in MS11-065 and KB2621440 in MS12-020 replaced by KB2685939
Windows Server 2003 x64 Edition Service Pack 2
(KB2685939)	Remote Code Execution	Critical	KB2570222 in MS11-065 and KB2621440 in MS12-020 replaced by KB2685939
Windows Server 2003 with SP2 for Itanium-based Systems
(KB2685939)	Remote Code Execution	Critical	KB2570222 in MS11-065 and KB2621440 in MS12-020 replaced by KB2685939
Windows Vista Service Pack 2
(KB2685939)	Denial of Service	Moderate	None
Windows Vista x64 Edition Service Pack 2
(KB2685939)	Denial of Service	Moderate	None
Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 for x64-based Systems Service Pack 2
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 for Itanium-based Systems Service Pack 2
(KB2685939)	Remote Code Execution	Critical	KB2621440 in MS12-020 replaced by KB2685939
Windows 7 for 32-bit Systems
(KB2685939)	Denial of Service	Moderate	None
Windows 7 for 32-bit Systems Service Pack 1
(KB2685939)	Remote Code Execution	Critical	None
Windows 7 for x64-based Systems
(KB2685939)	Denial of Service	Moderate	None
Windows 7 for x64-based Systems Service Pack 1
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for x64-based Systems
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for Itanium-based Systems
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
(KB2685939)	Remote Code Execution	Critical	None
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 for x64-based Systems Service Pack 2
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for x64-based Systems
(KB2685939)	Remote Code Execution	Critical	None
Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2685939)	Remote Code Execution	Critical	None
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Frequently Asked Questions (FAQ) Related to This Security Update
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
Remote Desktop Protocol Vulnerability - CVE-2012-0173
Update Information
Detection and Deployment Tools and Guidance
Security Update Deployment
Other Information
Microsoft Active Protections Program (MAPP)
To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.
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Support

How to obtain help and support for this security update

    Help installing updates: Support for Microsoft Update
    Security solutions for IT professionals: TechNet Security Troubleshooting and Support
    Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
    Local support according to your country: International Support

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Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
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Revisions

    V1.0 (June 12, 2012): Bulletin published.
    V1.1 (June 13, 2012): Added a workaround in the Vulnerability Information section that explains how to enable Network Level Authentication on Windows Vista, Windows 7, Windows Server 2008, and Windows Server 2008 R2.