Summary

This security update resolves a vulnerability in Windows. The vulnerability could allow remote code execution if an attacker successfully convinces a user to browse to a specially crafted website or open a specially crafted file.

Introduction

Microsoft has released security bulletin MS15-020. To learn more about this security bulletin:

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 Windows-based computer from viruses and malware:
Virus Solution and Security Center

Local support according to your country:
International Support

More Information

Known issues with this security update

  • After you install this security update, some systems that use the Japanese input method editor (IME) may become unresponsive. Also, Windows Explorer may crash.

    To resolve this issue, click the following article number to view the article in the Microsoft Knowledge Base:

    3048778 Update 3033889 causes Windows Explorer to stop responding on some systems that use the Japanese IME

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.

  • The files that apply to a specific milestone (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 (KBnumber.cat) that is signed with a Microsoft digital signature.

For all supported x64-based versions of Windows Server 2003

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Spuninst.exe

6.3.4.1

293,168

22-Jan-2015

02:07

x64

None

Not applicable

Msctf.dll

5.2.3790.5528

635,392

22-Jan-2015

02:05

x64

SP2

SP2QFE

Wmsctf.dll

5.2.3790.5528

317,952

22-Jan-2015

02:05

x86

SP2

SP2QFE\WOW

For all supported x86-based versions of Windows Server 2003

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Spuninst.exe

6.3.4.1

221,488

16-May-2014

03:14

x86

None

Not applicable

Msctf.dll

5.2.3790.5528

317,952

22-Jan-2015

01:59

x86

SP2

SP2QFE

For all supported IA-64-based versions of Windows Server 2003

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Spuninst.exe

6.3.4.1

501,552

22-Jan-2015

02:07

IA-64

None

Not applicable

Msctf.dll

5.2.3790.5528

1,011,712

22-Jan-2015

02:05

IA-64

SP2

SP2QFE

Wmsctf.dll

5.2.3790.5528

317,952

22-Jan-2015

02:05

x86

SP2

SP2QFE\WOW


  • The files that apply to a specific product, milestone (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

    6.0.6002.18xxx

    Windows Vista SP2 and Windows Server 2008 SP2

    SP2

    GDR

    6.0.6002.23xxx

    Windows Vista SP2 and Windows Server 2008 SP2

    SP2

    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 Vista and Windows Server 2008

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.0.6002.19296

807,936

21-Jan-2015

02:02

x86

Msctf.dll

6.0.6002.23606

807,936

21-Jan-2015

01:36

x86

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

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.0.6002.19296

1,040,896

21-Jan-2015

01:42

x64

Msctf.dll

6.0.6002.23606

1,040,896

21-Jan-2015

01:26

x64

Msctf.dll

6.0.6002.19296

807,936

21-Jan-2015

02:02

x86

Msctf.dll

6.0.6002.23606

807,936

21-Jan-2015

01:36

x86

For all supported IA-64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.0.6002.19296

2,061,824

21-Jan-2015

01:28

IA-64

Msctf.dll

6.0.6002.23606

2,061,824

21-Jan-2015

01:08

IA-64

Msctf.dll

6.0.6002.19296

807,936

21-Jan-2015

02:02

x86

Msctf.dll

6.0.6002.23606

807,936

21-Jan-2015

01:36

x86


  • 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

Msctf.dll

6.1.7601.18731

828,928

17-Jan-2015

02:30

x86

Msctf.dll

6.1.7601.22937

829,952

17-Jan-2015

03:03

x86

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

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.1.7601.18731

1,067,520

17-Jan-2015

02:48

x64

Msctf.dll

6.1.7601.22937

1,069,056

17-Jan-2015

03:06

x64

Msctf.dll

6.1.7601.18731

828,928

17-Jan-2015

02:30

x86

Msctf.dll

6.1.7601.22937

829,952

17-Jan-2015

03:03

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.1.7601.18731

2,098,176

17-Jan-2015

02:21

IA-64

Msctf.dll

6.1.7601.22937

2,101,248

17-Jan-2015

02:12

IA-64

Msctf.dll

6.1.7601.18731

828,928

17-Jan-2015

02:30

x86

Msctf.dll

6.1.7601.22937

829,952

17-Jan-2015

03:03

x86


  • 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

    6.2.920 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8 and Windows Server 2012

    RTM

    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 8

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.2.9200.17243

892,416

20-Jan-2015

05:10

x86

Msctf.dll

6.2.9200.21361

888,832

19-Jan-2015

23:40

x86

For all supported x64-based versions of Windows 8 and Windows Server 2012

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.2.9200.17243

1,120,256

20-Jan-2015

06:41

x64

Msctf.dll

6.2.9200.21361

1,117,184

19-Jan-2015

23:29

x64

Msctf.dll

6.2.9200.17243

892,416

20-Jan-2015

05:10

x86

Msctf.dll

6.2.9200.21361

888,832

19-Jan-2015

23:40

x86


For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.3.9600.17664

1,123,848

21-Jan-2015

05:15

x86

For all supported x64-based versions of Windows 8.1 and Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Msctf.dll

6.3.9600.17664

1,384,712

21-Jan-2015

05:54

x64

Msctf.dll

6.3.9600.17664

1,123,848

21-Jan-2015

05:15

x86


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