MS15-053: Description of the security update for VBScript and JScript 5.7: May 12, 2015

Summary

This security update resolves address space layout randomization (ASLR) security feature bypasses in the JScript and VBScript scripting engines in Microsoft Windows. An attacker could use one of these ASLR bypasses together with another vulnerability, such as a remote code execution vulnerability, to more reliably run arbitrary code on a target system. 

The update addresses the ASLR bypasses by helping to make sure that affected versions of JScript and VBScript correctly implement the ASLR security feature.

Introduction

Microsoft has released security bulletin MS15-053. 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

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

Jscript.dll

5.7.6002.23659

755,200

01-Apr-2015

01:00

x64

SP2

SP2QFE

Vbscript.dll

5.7.6002.23659

603,136

01-Apr-2015

01:00

x64

SP2

SP2QFE

Wjscript.dll

5.7.6002.23659

512,000

01-Apr-2015

01:00

x86

SP2

SP2QFE\WOW

Wvbscript.dll

5.7.6002.23659

434,176

01-Apr-2015

01:00

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

Jscript.dll

5.7.6002.23659

512,000

01-Apr-2015

00:52

x86

SP2

SP2QFE

Vbscript.dll

5.7.6002.23659

434,176

01-Apr-2015

00:52

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

Jscript.dll

5.7.6002.23659

1,378,304

01-Apr-2015

00:58

IA-64

SP2

SP2QFE

Vbscript.dll

5.7.6002.23659

1,155,072

01-Apr-2015

00:58

IA-64

SP2

SP2QFE

Wjscript.dll

5.7.6002.23659

512,000

01-Apr-2015

00:58

x86

SP2

SP2QFE\WOW

Wvbscript.dll

5.7.6002.23659

434,176

01-Apr-2015

00:58

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

Jscript.dll

5.7.6002.19351

512,000

30-Mar-2015

01:00

x86

Jscript.dll

5.7.6002.23659

512,000

30-Mar-2015

00:30

x86

Vbscript.dll

5.7.6002.19351

430,080

30-Mar-2015

01:00

x86

Vbscript.dll

5.7.6002.23659

434,176

30-Mar-2015

00:31

x86

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

File name

File version

File size

Date

Time

Platform

Jscript.dll

5.7.6002.19351

754,688

30-Mar-2015

00:39

x64

Jscript.dll

5.7.6002.23659

755,200

30-Mar-2015

00:31

x64

Vbscript.dll

5.7.6002.19351

603,648

30-Mar-2015

00:40

x64

Vbscript.dll

5.7.6002.23659

603,136

30-Mar-2015

00:32

x64

Jscript.dll

5.7.6002.19351

512,000

30-Mar-2015

01:00

x86

Jscript.dll

5.7.6002.23659

512,000

30-Mar-2015

00:30

x86

Vbscript.dll

5.7.6002.19351

430,080

30-Mar-2015

01:00

x86

Vbscript.dll

5.7.6002.23659

434,176

30-Mar-2015

00:31

x86

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

File name

File version

File size

Date

Time

Platform

Jscript.dll

5.7.6002.19351

1,378,304

30-Mar-2015

00:20

IA-64

Jscript.dll

5.7.6002.23659

1,378,304

30-Mar-2015

00:01

IA-64

Vbscript.dll

5.7.6002.19351

1,153,536

30-Mar-2015

00:21

IA-64

Vbscript.dll

5.7.6002.23659

1,155,072

30-Mar-2015

00:02

IA-64

Jscript.dll

5.7.6002.19351

512,000

30-Mar-2015

01:00

x86

Jscript.dll

5.7.6002.23659

512,000

30-Mar-2015

00:30

x86

Vbscript.dll

5.7.6002.19351

430,080

30-Mar-2015

01:00

x86

Vbscript.dll

5.7.6002.23659

434,176

30-Mar-2015

00:31

x86


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