Security update 956744 updates the following binaries:
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Binary name
Standard locations
Mstscax.dll
a) %Windir%\System32 b) %SystemDrive%\Program Files\Remote Desktop
Mstsc.exe
a) %Windir%\System32 b) %SystemDrive%\Program Files\Remote Desktop
Msrdp.ocx
%Windir%\Download Program Files
Msrdp.cab
a) %Windir%\Web\Tsweb b) Install path under "hklm\software\microsoft\TS Web Clients" under value "InstallDir" c) %SystemDrive%\Inetpub\Remote
Note The files are updated only if the files were already present on the client computer.
Security update 956744 updates the following binaries on the following operating systems:
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Mstscax.dll
Msrdp.ocx
Msrdp.cab
Windows Vista
Yes
No
No
Windows Server 2003
Yes
No
Yes
Windows XP
Yes
Yes
No
Note that in specific deployments on out-of-box versions of the RDP client, files may be renamed during installation. The file names listed in the "File information" in this article are the original names prior to installation.
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Platform
RDP version
Name of the binary carried in the package
Name of the binary after installation
Windows Server 2003 Service Pack 2
6.0
lhmstscx.dll
mstscax.dll
Windows XP Service Pack 2
6.0 and 6.1
lhmstscx.dll and lhmstsc.exe
mstscax.dll and mstsc.exe
Frequently asked questions
Question If I have an application that deploys the Remote Desktop Web Connection binaries in non-default locations, will this security update patch my installation? Answer This update updates the Microsoft Remote Desktop Web Connection binaries in standard locations. If your redistributed Microsoft Remote Desktop Web Connection binaries are in a custom location, you will have to update the custom location with the updated Microsoft Remote Desktop Web Connection binaries.
Question After I install the update, I do not have the Msrdp.cab file. Why?
Answer This update updates only the files that were present on the computer before you installed the update. Therefore, if the Msrdp.cab file was not on the Windows XP SP2-based computer before you installed the update, the Msrdp.cab file is not installed on the computer.
Question I have an old Msrdp.cab file that is being redistributed from my Terminal Server Web Server computer. Are my clients vulnerable? Answer Your updated client computers will not be vulnerable even if the server is not updated. We strongly recommend that you apply the update on the Terminal Services Web Server so that the redistribution of vulnerable Msrdp.ocx files can be prevented to any clients that are not updated.
Question Before I installed security update 956744, I had RDC 6.0 QFE running on Windows XP SP2. After I installed the security update, I am running RDC 6.1 QFE. Why?
Answer Microsoft does not service RDC 6.0 QFEs for Windows XPSP2. Customers are encouraged to migrate to RDC 6.1, which is also the in-box version for Windows XP SP3.
Question On a Windows XP SP2-based computer, I had RDC 6.0 QFE and the Multilingual User Interface (MUI) pack installed. After I installed security update 956744, my MUI pack does not work. Why?
Answer After you install security update 956744, the client computer is moved from RDC 6.0 QFE to RDC 6.1 QFE. However, your computer still has the 6.0 MUI pack. To resolve this problem, install the 6.1 MUI pack.
The English (United States) version of this security update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows XP and Windows Server 2003 file information
The files that apply to a specific milestone (RTM, SPn) and service branch (QFE, GDR) are noted in the "SP requirement" and "Service branch" columns.
GDR service branches contain only those fixes that are widely released to address widespread, critical issues. QFE service branches contain hotfixes in addition to widely released fixes.
In addition to the files that are listed in these tables, this software update also installs an associated security catalog file (KB number.cat) that is signed with a Microsoft digital signature.
For all supported x86-based versions of Windows XP
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
SP requirement
Service branch
Lhmstscx.dll
6.0.6000.16865
1,871,872
09-Jun-2009
15:06
x86
SP2
SP2GDR
Msrdp.ocx
5.2.3790.4522
760,320
19-Jun-2009
04:26
x86
SP2
SP2GDR\MSRDP.CAB_CAB_FILES
Aaclient.dll
6.0.6001.22443
136,192
09-Jun-2009
14:53
x86
SP2
SP2QFE
Aaclient.mui
6.0.6001.22403
4,096
27-May-2009
12:48
Not Applicable
SP2
SP2QFE
Lhmstsc.exe
6.0.6001.22443
677,888
09-Jun-2009
09:12
x86
SP2
SP2QFE
Lhmstsc.mui
6.0.6001.22403
49,152
27-May-2009
12:48
Not Applicable
SP2
SP2QFE
Lhmstscx.dll
6.0.6001.22443
2,067,968
09-Jun-2009
14:53
x86
SP2
SP2QFE
Lhmstscx.mui
6.0.6001.22403
86,016
27-May-2009
12:48
Not Applicable
SP2
SP2QFE
Rhttpaa.dll
6.0.6001.22443
290,816
09-Jun-2009
14:53
x86
SP2
SP2QFE
Tsgqec.dll
6.0.6001.22443
53,248
09-Jun-2009
14:53
x86
SP2
SP2QFE
Msrdp.ocx
5.2.3790.4522
760,320
09-Jun-2009
23:26
x86
SP2
SP2QFE\MSRDP.CAB_CAB_FILES
Lhmstscx.dll
6.0.6001.18266
2,066,432
10-Jun-2009
16:19
x86
SP3
SP3GDR
Lhmstscx.dll
6.0.6001.22443
2,067,968
09-Jun-2009
15:21
x86
SP3
SP3QFE
For all supported x64-based versions of Windows Server 2003 and of Windows XP Professional x64 edition
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
SP requirement
Service branch
Lhmstscx.dll
6.0.6000.16865
2,194,432
02-Jul-2009
19:09
x64
SP2
SP2GDR
Msrdp.ocx
5.2.3790.4525
760,320
09-Jun-2009
06:39
x86
SP2
SP2GDR\MSRDP.CAB_CAB_FILES
Wlhmstscx.dll
6.0.6000.16865
1,871,872
02-Jul-2009
19:09
x86
SP2
SP2GDR\WOW
Lhmstscx.dll
6.0.6000.21061
2,197,504
02-Jul-2009
19:06
x64
SP2
SP2QFE
Msrdp.ocx
5.2.3790.4525
760,320
09-Jun-2009
06:24
x86
SP2
SP2QFE\MSRDP.CAB_CAB_FILES
Wlhmstscx.dll
6.0.6000.21061
1,874,432
02-Jul-2009
19:06
x86
SP2
SP2QFE\WOW
For all supported IA-64-based versions of Windows Server 2003
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
SP requirement
Service branch
Lhmstscx.dll
6.0.6000.16865
1,871,872
09-Jun-2009
06:39
x86
SP2
SP2GDR
Msrdp.ocx
5.2.3790.4525
760,320
09-Jun-2009
06:39
x86
SP2
SP2GDR\MSRDP.CAB_CAB_FILES
Lhmstscx.dll
6.0.6000.21061
1,874,432
09-Jun-2009
06:24
x86
SP2
SP2QFE
Msrdp.ocx
5.2.3790.4525
760,320
09-Jun-2009
06:24
x86
SP2
SP2QFE\MSRDP.CAB_CAB_FILES
Windows Vista and Windows Server 2008 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:
Collapse this tableExpand this table
Version
Product
SR_Level
Service branch
6.0.6000.16xxx
Windows Vista
RTM
GDR
6.0.6000.20xxx
Windows Vista
RTM
LDR
6.0.6001.18xxx
Windows Vista and Windows Server 2008
SP1
GDR
6.0.6001.22xxx
Windows Vista and Windows Server 2008
SP1
LDR
6.0.600 2.18xxx
Windows Vista and Windows Server 2008
SP2
GDR
6.0.600 2.22xxx
Windows Vista and Windows Server 2008
SP2
LDR
Service Pack 1 is integrated into the release version of Windows Server 2008.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Aaclient.dll
6.0.6000.16865
116,736
04-Jun-2009
12:36
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:55
Not Applicable
Mstscax.dll
6.0.6000.16865
1,871,872
04-Jun-2009
12:43
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:56
Not Applicable
Tsgqec.dll
6.0.6000.16865
36,352
04-Jun-2009
12:47
x86
Aaclient.dll
6.0.6000.21061
116,736
04-Jun-2009
12:25
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:55
Not Applicable
Mstscax.dll
6.0.6000.21061
1,874,432
04-Jun-2009
12:31
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:56
Not Applicable
Tsgqec.dll
6.0.6000.21061
36,352
04-Jun-2009
12:34
x86
Aaclient.dll
6.0.6001.18000
136,192
19-Jan-2008
07:33
x86
Aaclient.mof
Not Applicable
1,097
18-Sep-2006
21:26
Not Applicable
Mstscax.dll
6.0.6001.18266
2,066,432
04-Jun-2009
12:34
x86
Mstscax.mof
Not Applicable
1,967
18-Sep-2006
21:27
Not Applicable
Tsgqec.dll
6.0.6001.18000
53,248
19-Jan-2008
07:36
x86
Aaclient.dll
6.0.6001.22443
136,192
04-Jun-2009
12:29
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
18:53
Not Applicable
Mstscax.dll
6.0.6001.22443
2,067,968
04-Jun-2009
12:33
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
18:54
Not Applicable
Tsgqec.dll
6.0.6001.22443
53,248
04-Jun-2009
12:35
x86
Aaclient.dll
6.0.6002.18005
136,192
11-Apr-2009
06:28
x86
Aaclient.mof
Not Applicable
1,097
16-Apr-2008
00:32
Not Applicable
Mstscax.dll
6.0.6002.18045
2,066,432
04-Jun-2009
12:07
x86
Mstscax.mof
Not Applicable
1,967
16-Apr-2008
00:33
Not Applicable
Tsgqec.dll
6.0.6002.18005
53,248
11-Apr-2009
06:28
x86
Aaclient.dll
6.0.6002.22146
136,192
04-Jun-2009
12:54
x86
Aaclient.mof
Not Applicable
1,097
03-Apr-2009
20:41
Not Applicable
Mstscax.dll
6.0.6002.22146
2,067,968
04-Jun-2009
12:56
x86
Mstscax.mof
Not Applicable
1,967
03-Apr-2009
20:42
Not Applicable
Tsgqec.dll
6.0.6002.22146
53,248
04-Jun-2009
10:52
x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Aaclient.dll
6.0.6000.16865
130,048
04-Jun-2009
12:53
x64
Aaclient.mof
Not Applicable
1,097
02-Apr-2009
19:26
Not Applicable
Mstscax.dll
6.0.6000.16865
2,194,432
04-Jun-2009
13:03
x64
Mstscax.mof
Not Applicable
1,967
02-Apr-2009
19:27
Not Applicable
Tsgqec.dll
6.0.6000.16865
27,648
04-Jun-2009
13:07
x64
Aaclient.dll
6.0.6000.21061
130,048
04-Jun-2009
12:48
x64
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:55
Not Applicable
Mstscax.dll
6.0.6000.21061
2,197,504
04-Jun-2009
12:57
x64
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:57
Not Applicable
Tsgqec.dll
6.0.6000.21061
27,648
04-Jun-2009
13:01
x64
Aaclient.dll
6.0.6001.18000
151,552
19-Jan-2008
08:00
x64
Aaclient.mof
Not Applicable
1,097
18-Sep-2006
21:23
Not Applicable
Mstscax.dll
6.0.6001.18266
2,423,296
04-Jun-2009
12:59
x64
Mstscax.mof
Not Applicable
1,967
18-Sep-2006
21:25
Not Applicable
Tsgqec.dll
6.0.6001.18000
45,056
19-Jan-2008
08:04
x64
Aaclient.dll
6.0.6001.22443
151,552
04-Jun-2009
12:42
x64
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:54
Not Applicable
Mstscax.dll
6.0.6001.22443
2,425,344
04-Jun-2009
12:45
x64
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:55
Not Applicable
Tsgqec.dll
6.0.6001.22443
45,056
04-Jun-2009
12:46
x64
Aaclient.dll
6.0.6002.18005
151,552
11-Apr-2009
07:11
x64
Aaclient.mof
Not Applicable
1,097
03-Sep-2008
18:33
Not Applicable
Mstscax.dll
6.0.6002.18045
2,424,320
04-Jun-2009
12:52
x64
Mstscax.mof
Not Applicable
1,967
03-Sep-2008
18:34
Not Applicable
Tsgqec.dll
6.0.6002.18005
45,056
11-Apr-2009
07:11
x64
Aaclient.dll
6.0.6002.22146
151,552
04-Jun-2009
14:24
x64
Aaclient.mof
Not Applicable
1,097
03-Apr-2009
20:39
Not Applicable
Mstscax.dll
6.0.6002.22146
2,425,344
04-Jun-2009
14:26
x64
Mstscax.mof
Not Applicable
1,967
03-Apr-2009
20:40
Not Applicable
Tsgqec.dll
6.0.6002.22146
45,056
04-Jun-2009
14:28
x64
Aaclient.dll
6.0.6000.16865
116,736
04-Jun-2009
12:36
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:55
Not Applicable
Mstscax.dll
6.0.6000.16865
1,871,872
04-Jun-2009
12:43
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:56
Not Applicable
Tsgqec.dll
6.0.6000.16865
36,352
04-Jun-2009
12:47
x86
Aaclient.dll
6.0.6000.21061
116,736
04-Jun-2009
12:25
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:55
Not Applicable
Mstscax.dll
6.0.6000.21061
1,874,432
04-Jun-2009
12:31
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:56
Not Applicable
Tsgqec.dll
6.0.6000.21061
36,352
04-Jun-2009
12:34
x86
Aaclient.dll
6.0.6001.18000
136,192
19-Jan-2008
07:33
x86
Aaclient.mof
Not Applicable
1,097
18-Sep-2006
21:26
Not Applicable
Mstscax.dll
6.0.6001.18266
2,066,432
04-Jun-2009
12:34
x86
Mstscax.mof
Not Applicable
1,967
18-Sep-2006
21:27
Not Applicable
Tsgqec.dll
6.0.6001.18000
53,248
19-Jan-2008
07:36
x86
Aaclient.dll
6.0.6001.22443
136,192
04-Jun-2009
12:29
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
18:53
Not Applicable
Mstscax.dll
6.0.6001.22443
2,067,968
04-Jun-2009
12:33
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
18:54
Not Applicable
Tsgqec.dll
6.0.6001.22443
53,248
04-Jun-2009
12:35
x86
Aaclient.dll
6.0.6002.18005
136,192
11-Apr-2009
06:28
x86
Aaclient.mof
Not Applicable
1,097
16-Apr-2008
00:32
Not Applicable
Mstscax.dll
6.0.6002.18045
2,066,432
04-Jun-2009
12:07
x86
Mstscax.mof
Not Applicable
1,967
16-Apr-2008
00:33
Not Applicable
Tsgqec.dll
6.0.6002.18005
53,248
11-Apr-2009
06:28
x86
Aaclient.dll
6.0.6002.22146
136,192
04-Jun-2009
12:54
x86
Aaclient.mof
Not Applicable
1,097
03-Apr-2009
20:41
Not Applicable
Mstscax.dll
6.0.6002.22146
2,067,968
04-Jun-2009
12:56
x86
Mstscax.mof
Not Applicable
1,967
03-Apr-2009
20:42
Not Applicable
Tsgqec.dll
6.0.6002.22146
53,248
04-Jun-2009
10:52
x86
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Aaclient.dll
6.0.6001.18000
298,496
19-Jan-2008
08:23
IA-64
Aaclient.mof
Not Applicable
1,097
03-Jan-2008
18:36
Not Applicable
Mstscax.dll
6.0.6001.18266
4,928,512
04-Jun-2009
12:30
IA-64
Mstscax.mof
Not Applicable
1,967
03-Jan-2008
18:36
Not Applicable
Tsgqec.dll
6.0.6001.18000
80,384
19-Jan-2008
08:29
IA-64
Aaclient.dll
6.0.6001.22443
298,496
04-Jun-2009
12:23
IA-64
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
15:54
Not Applicable
Mstscax.dll
6.0.6001.22443
4,935,168
04-Jun-2009
12:28
IA-64
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
15:56
Not Applicable
Tsgqec.dll
6.0.6001.22443
80,384
04-Jun-2009
12:30
IA-64
Aaclient.dll
6.0.6002.18005
298,496
11-Apr-2009
06:59
IA-64
Aaclient.mof
Not Applicable
1,097
03-Sep-2008
18:33
Not Applicable
Mstscax.dll
6.0.6002.18045
4,933,120
04-Jun-2009
12:05
IA-64
Mstscax.mof
Not Applicable
1,967
03-Sep-2008
18:34
Not Applicable
Tsgqec.dll
6.0.6002.18005
80,384
11-Apr-2009
06:59
IA-64
Aaclient.dll
6.0.6002.22146
298,496
04-Jun-2009
14:07
IA-64
Aaclient.mof
Not Applicable
1,097
03-Apr-2009
20:39
Not Applicable
Mstscax.dll
6.0.6002.22146
4,934,656
04-Jun-2009
14:10
IA-64
Mstscax.mof
Not Applicable
1,967
03-Apr-2009
20:40
Not Applicable
Tsgqec.dll
6.0.6002.22146
80,384
04-Jun-2009
14:13
IA-64
Aaclient.dll
6.0.6001.18000
136,192
19-Jan-2008
07:33
x86
Aaclient.mof
Not Applicable
1,097
18-Sep-2006
21:26
Not Applicable
Mstscax.dll
6.0.6001.18266
2,066,432
04-Jun-2009
12:34
x86
Mstscax.mof
Not Applicable
1,967
18-Sep-2006
21:27
Not Applicable
Tsgqec.dll
6.0.6001.18000
53,248
19-Jan-2008
07:36
x86
Aaclient.dll
6.0.6001.22443
136,192
04-Jun-2009
12:29
x86
Aaclient.mof
Not Applicable
1,097
01-Apr-2009
18:53
Not Applicable
Mstscax.dll
6.0.6001.22443
2,067,968
04-Jun-2009
12:33
x86
Mstscax.mof
Not Applicable
1,967
01-Apr-2009
18:54
Not Applicable
Tsgqec.dll
6.0.6001.22443
53,248
04-Jun-2009
12:35
x86
Aaclient.dll
6.0.6002.18005
136,192
11-Apr-2009
06:28
x86
Aaclient.mof
Not Applicable
1,097
16-Apr-2008
00:32
Not Applicable
Mstscax.dll
6.0.6002.18045
2,066,432
04-Jun-2009
12:07
x86
Mstscax.mof
Not Applicable
1,967
16-Apr-2008
00:33
Not Applicable
Tsgqec.dll
6.0.6002.18005
53,248
11-Apr-2009
06:28
x86
Aaclient.dll
6.0.6002.22146
136,192
04-Jun-2009
12:54
x86
Aaclient.mof
Not Applicable
1,097
03-Apr-2009
20:41
Not Applicable
Mstscax.dll
6.0.6002.22146
2,067,968
04-Jun-2009
12:56
x86
Mstscax.mof
Not Applicable
1,967
03-Apr-2009
20:42
Not Applicable
Tsgqec.dll
6.0.6002.22146
53,248
04-Jun-2009
10:52
x86
Additional file information for Windows Server 2008 and for Windows Vista
Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista