MS15-082: Description of the security update for RDP in Windows: August 11, 2015

Summary
This security update resolves vulnerabilities in Windows. The most severe of the vulnerabilities could allow remote code execution if an attacker first places a specially crafted dynamic link library (DLL) file in the target user’s current working directory and then convinces the user to open an RDP file or to launch a program that is designed to load a trusted DLL file but instead loads the attacker’s specially crafted DLL file. An attacker who successfully exploited the vulnerabilities could take complete control of an affected system. An attacker could then install programs, could view, change, or delete data, or could create new accounts that have full user rights.

This security update addresses the vulnerability by correcting how the Remote Desktop Session Host (RDSH) validates certificates and how RDP loads certain binaries.

To learn more about the update, see Microsoft Knowledge Base article 3073094.

To learn more about the vulnerability, see Microsoft Security Bulletin MS15-082.
More information
Important
  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
  • This update will only be offered to computers that are running Windows 7 or Windows Server 2008 R2, and that have RDP 8.1 and Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.
    2830477 Update for RemoteApp and Desktop Connections feature is available for Windows
    976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, seeGet security updates automatically.

Method 2: Microsoft Download Center

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS15-082 that corresponds to the version of Windows that you are running.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    VersionProductMilestoneService branch
    6.1.7601.18xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.7601.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x86-based versions of Windows 7

File nameFile versionFile sizeDateTimePlatform
Wksprt.exe6.3.9600.17930355,84016-Jul-201515:14x86
Wksprt.exe6.3.9600.17930355,84016-Jul-201515:15x86
Mstscax.dll6.3.9600.179306,131,20016-Jul-201519:12x86
Mstscax.mofNot applicable2,05503-Jun-201520:17Not applicable
Rdvidcrl.dll6.3.9600.16415856,06416-Jul-201519:12x86
Tsgqec.dll6.3.9600.1641553,24816-Jul-201519:12x86
Mstscax.dll6.3.9600.179306,131,20016-Jul-201517:44x86
Mstscax.mofNot applicable2,05503-Jun-201520:16Not applicable
Rdvidcrl.dll6.3.9600.16415856,06416-Jul-201517:44x86
Tsgqec.dll6.3.9600.1641553,24816-Jul-201517:44x86

For all supported x64-based versions of Windows 7 and Windows Server 2008 R2

File nameFile versionFile sizeDateTimePlatform
Wksprt.exe6.3.9600.17930429,56811-Jul-201513:15x64
Wksprt.exe6.3.9600.17930429,56811-Jul-201513:15x64
Mstscax.dll6.3.9600.179307,077,37616-Jul-201519:11x64
Mstscax.mofNot applicable2,05503-Jun-201520:17Not applicable
Rdvidcrl.dll6.3.9600.164151,057,79216-Jul-201519:11x64
Tsgqec.dll6.3.9600.1641562,97616-Jul-201519:11x64
Mstscax.dll6.3.9600.179307,077,37616-Jul-201518:09x64
Mstscax.mofNot applicable2,05503-Jun-201520:17Not applicable
Rdvidcrl.dll6.3.9600.164151,057,79216-Jul-201518:09x64
Tsgqec.dll6.3.9600.1641562,97616-Jul-201518:09x64
Mstscax.dll6.3.9600.179306,131,20016-Jul-201519:12x86
Mstscax.mofNot applicable2,05503-Jun-201520:17Not applicable
Rdvidcrl.dll6.3.9600.16415856,06416-Jul-201519:12x86
Tsgqec.dll6.3.9600.1641553,24816-Jul-201519:12x86
Mstscax.dll6.3.9600.179306,131,20016-Jul-201517:44x86
Mstscax.mofNot applicable2,05503-Jun-201520:16Not applicable
Rdvidcrl.dll6.3.9600.16415856,06416-Jul-201517:44x86
Tsgqec.dll6.3.9600.1641553,24816-Jul-201517:44x86

How to obtain help and support for this security update

Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support
malicious attacker exploit
Properties

Article ID: 3075226 - Last Review: 08/11/2015 17:08:00 - Revision: 1.0

Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1

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