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:
Home users:
https://www.microsoft.com/security/pc-security/updates.aspx Skip the details: Download the updates for your home computer or laptop from the Microsoft Update website now:
IT professionals:
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.
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 x64-based versions of Windows Server 2008 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Jscript.dll | 5.8.7601.18811 | 910,848 | 03-Apr-2015 | 03:25 | x64 |
| Jscript.dll | 5.8.7601.23016 | 910,848 | 03-Apr-2015 | 03:32 | x64 |
| Vbscript.dll | 5.8.7601.18811 | 610,304 | 03-Apr-2015 | 03:26 | x64 |
| Vbscript.dll | 5.8.7601.23016 | 610,304 | 03-Apr-2015 | 03:32 | x64 |
| Jscript.dll | 5.8.7601.18811 | 717,824 | 03-Apr-2015 | 03:06 | x86 |
| Jscript.dll | 5.8.7601.23016 | 717,824 | 03-Apr-2015 | 03:10 | x86 |
| Vbscript.dll | 5.8.7601.18811 | 428,544 | 03-Apr-2015 | 03:06 | x86 |
| Vbscript.dll | 5.8.7601.23016 | 428,544 | 03-Apr-2015 | 03:10 | x86 |
| Jscript.dll | 5.8.7601.18811 | 717,824 | 03-Apr-2015 | 03:06 | x86 |
| Jscript.dll | 5.8.7601.23016 | 717,824 | 03-Apr-2015 | 03:10 | x86 |