Microsoft Security Bulletin MS12-053 - Critical
Vulnerability in Remote Desktop Could Allow Remote Code Execution (2723135)
Published: | Updated:
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 XP. 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. Most 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
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, see Microsoft Support Lifecycle.
|Operating System||Maximum Security Impact||Aggregate Severity Rating||Updates Replaced|
|Windows XP Service Pack 3 |
|Remote Code Execution||Critical||KB2685939 in MS12-036 replaced by KB2723135|
|Windows XP Professional x64 Edition Service Pack 2|
|Windows Server 2003 Service Pack 2|
|Windows Server 2003 x64 Edition Service Pack 2|
|Windows Server 2003 with SP2 for Itanium-based Systems|
|Windows Vista Service Pack 2|
|Windows Vista x64 Edition Service Pack 2|
|Windows Server 2008 for 32-bit Systems Service Pack 2|
|Windows Server 2008 for x64-based Systems Service Pack 2|
|Windows Server 2008 for Itanium-based Systems Service Pack 2|
|Windows 7 for 32-bit Systems|
|Windows 7 for 32-bit Systems Service Pack 1|
|Windows 7 for x64-based Systems|
|Windows 7 for x64-based Systems Service Pack 1|
|Windows Server 2008 R2 for x64-based Systems|
|Windows Server 2008 R2 for x64-based Systems Service Pack 1|
|Windows Server 2008 R2 for Itanium-based Systems|
|Windows Server 2008 R2 for Itanium-based Systems Service Pack 1|
Microsoft thanks the following for working with us to help protect customers:
- Edward Torkington of NCC Group for reporting the Remote Desktop Protocol Vulnerability (CVE-2012-2526)
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 go to the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.
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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- V1.0 (August 14, 2012): Bulletin published.
- V2.0 (October 9, 2012): Revised bulletin to rerelease the KB2723135 update for Windows XP. Customers do not need to apply the rereleased update packages to avoid an issue with digital certificates described in Microsoft Security Advisory 2749655.
- V2.1 (October 10, 2012): For the rereleased KB2723135 update, added an FAQ entry to provide deployment guidance. See the update FAQ for details.