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 the following update installed:


    2592687 Remote Desktop Protocol (RDP) 8.0 update for Windows 7 and Windows Server 2008 R2

Known issues


  • After you install or uninstall this security update, you may have to restart the computer two times.

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, see
Get security updates automatically.

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.

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:

    Version

    Product

    Milestone

    Service branch

    6.1.7601.18xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.7601.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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 name

File version

File size

Date

Time

Platform

Aaclient.dll

6.2.9200.17435

269,824

16-Jul-2015

19:12

x86

Aaclient.mof

Not applicable

930

03-Jun-2015

20:16

Not applicable

Mstscax.dll

6.2.9200.17435

4,922,368

16-Jul-2015

19:12

x86

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:16

Not applicable

Tsgqec.dll

6.2.9200.16398

37,376

16-Jul-2015

19:12

x86

Aaclient.dll

6.2.9200.21545

269,824

16-Jul-2015

17:44

x86

Aaclient.mof

Not applicable

930

03-Jun-2015

20:16

Not applicable

Mstscax.dll

6.2.9200.21545

4,922,368

16-Jul-2015

17:44

x86

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:16

Not applicable

Tsgqec.dll

6.2.9200.16398

37,376

16-Jul-2015

17:44

x86

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

File name

File version

File size

Date

Time

Platform

Aaclient.dll

6.2.9200.17435

322,560

16-Jul-2015

19:11

x64

Aaclient.mof

Not applicable

930

03-Jun-2015

20:16

Not applicable

Mstscax.dll

6.2.9200.17435

5,779,456

16-Jul-2015

19:11

x64

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:16

Not applicable

Tsgqec.dll

6.2.9200.16398

44,032

16-Jul-2015

19:11

x64

Aaclient.dll

6.2.9200.21545

322,560

16-Jul-2015

18:08

x64

Aaclient.mof

Not applicable

930

03-Jun-2015

20:17

Not applicable

Mstscax.dll

6.2.9200.21545

5,778,944

16-Jul-2015

18:08

x64

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:17

Not applicable

Tsgqec.dll

6.2.9200.16398

44,032

16-Jul-2015

18:09

x64

Aaclient.dll

6.2.9200.17435

269,824

16-Jul-2015

19:12

x86

Aaclient.mof

Not applicable

930

03-Jun-2015

20:16

Not applicable

Mstscax.dll

6.2.9200.17435

4,922,368

16-Jul-2015

19:12

x86

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:16

Not applicable

Tsgqec.dll

6.2.9200.16398

37,376

16-Jul-2015

19:12

x86

Aaclient.dll

6.2.9200.21545

269,824

16-Jul-2015

17:44

x86

Aaclient.mof

Not applicable

930

03-Jun-2015

20:16

Not applicable

Mstscax.dll

6.2.9200.21545

4,922,368

16-Jul-2015

17:44

x86

Mstscax.mof

Not applicable

2,055

03-Jun-2015

20:16

Not applicable

Tsgqec.dll

6.2.9200.16398

37,376

16-Jul-2015

17:44

x86


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

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