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MS15-041: Description of the security update for the .NET Framework 4.5, 4.5.1, and 4.5.2 on Windows Vista Service Pack 2, Windows Server 2008 Service Pack 2, Windows 7 Service Pack 1, and Windows Server 2008 R2 Service Pack 1: April 14, 2015
View products that this article applies to.
This update resolves a vulnerability in the Microsoft .NET Framework that could allow information disclosure if an attacker sends a specially crafted web request to an affected server that has custom error messages disabled. An attacker who successfully exploits the vulnerability would be able to view parts of a web configuration file that could expose sensitive information. To learn more about the vulnerability, see Microsoft Security Bulletin MS15-041.
Important To install this update, you must have Windows Installer 3.1 or a later version installed on the computer.
Note To resolve the vulnerability, you may need to apply multiple updates depending on the versions of .NET Framework you are running. For more information, see Affected versions of .NET Framework by this security bulletin.
Important To install this update, you must have Windows Installer 3.1 or a later version installed on the computer.
Note To resolve the vulnerability, you may need to apply multiple updates depending on the versions of .NET Framework you are running. For more information, see Affected versions of .NET Framework by this security bulletin.
Method 1: Windows Update
Method 2: Microsoft Download Center
You can obtain the stand-alone update package through the Microsoft Download Center. Follow the install instructions on the download page to install the update.
Download (KB3037581)
Download (KB3037581)
Security update deployment information
Command-line switches for this update
Learn about the various command-line switches that are supported by this Microsoft .NET Framework update.Restart requirements
This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.Removal information
Note We do not recommend that you remove any security update.To remove this update, follow these steps:
- Open the Programs and Features item in Control Panel.
- Click View installed updates.
- Select update 3037581.
- Click Uninstall.
Replacement information
This security update replaces previously released update 2901126.
File information
The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
For all supported x86-based versions of systems
GDR service branch
| File name | File version | File size | Date | Time |
|---|---|---|---|---|
| Aspnet_perf.dll | 4.0.30319.34249 | 41,624 | 06-Feb-2015 | 00:48 |
| aspnet_wp.exe | 4.0.30319.34249 | 43,144 | 06-Feb-2015 | 00:48 |
| System.Web.ApplicationServices.dll | 4.0.30319.34249 | 62,688 | 04-Feb-2015 | 20:26 |
| System.Web.Extensions.dll | 4.0.30319.34249 | 1,850,552 | 04-Feb-2015 | 20:26 |
| System.Web.dll | 4.0.30319.34249 | 5,456,528 | 04-Feb-2015 | 20:26 |
| System.Web.Mobile.dll | 4.0.30319.34249 | 839,856 | 04-Feb-2015 | 20:26 |
| webengine.dll | 4.0.30319.34249 | 24,712 | 06-Feb-2015 | 00:48 |
| webengine4.dll | 4.0.30319.34249 | 509,592 | 06-Feb-2015 | 00:48 |
| msvcr120_clr0400.dll | 12.0.51689.34249 | 875,688 | 06-Feb-2015 | 00:48 |
LDR service branch
| File name | File version | File size | Date | Time |
|---|---|---|---|---|
| Aspnet_perf.dll | 4.0.30319.36285 | 41,616 | 04-Feb-2015 | 14:13 |
| aspnet_wp.exe | 4.0.30319.36285 | 43,152 | 04-Feb-2015 | 14:13 |
| System.Web.ApplicationServices.dll | 4.0.30319.36285 | 62,680 | 04-Feb-2015 | 13:12 |
| System.Web.Extensions.dll | 4.0.30319.36285 | 1,850,560 | 04-Feb-2015 | 13:12 |
| System.Web.dll | 4.0.30319.36285 | 5,457,560 | 04-Feb-2015 | 13:12 |
| System.Web.Mobile.dll | 4.0.30319.36285 | 839,848 | 04-Feb-2015 | 13:12 |
| webengine.dll | 4.0.30319.36285 | 24,712 | 04-Feb-2015 | 14:13 |
| webengine4.dll | 4.0.30319.36285 | 509,576 | 04-Feb-2015 | 14:13 |
| msvcr120_clr0400.dll | 12.0.52285.36285 | 875,688 | 04-Feb-2015 | 14:13 |
For all supported x64-based versions of systems
GDR service branch
| File name | File version | File size | Date | Time |
|---|---|---|---|---|
| Aspnet_perf.dll | 4.0.30319.34249 | 45,208 | 06-Feb-2015 | 01:01 |
| Aspnet_perf.dll | 4.0.30319.34249 | 41,624 | 06-Feb-2015 | 00:48 |
| aspnet_wp.exe | 4.0.30319.34249 | 47,752 | 06-Feb-2015 | 01:01 |
| aspnet_wp.exe | 4.0.30319.34249 | 43,144 | 06-Feb-2015 | 00:48 |
| System.Web.ApplicationServices.dll | 4.0.30319.34249 | 62,688 | 04-Feb-2015 | 20:26 |
| System.Web.Extensions.dll | 4.0.30319.34249 | 1,850,552 | 04-Feb-2015 | 20:26 |
| System.Web.dll | 4.0.30319.34249 | 5,450,384 | 06-Feb-2015 | 01:01 |
| System.Web.dll | 4.0.30319.34249 | 5,456,528 | 04-Feb-2015 | 20:26 |
| System.Web.Mobile.dll | 4.0.30319.34249 | 839,856 | 04-Feb-2015 | 20:26 |
| webengine.dll | 4.0.30319.34249 | 26,760 | 06-Feb-2015 | 01:01 |
| webengine.dll | 4.0.30319.34249 | 24,712 | 06-Feb-2015 | 00:48 |
| webengine4.dll | 4.0.30319.34249 | 621,192 | 06-Feb-2015 | 01:01 |
| webengine4.dll | 4.0.30319.34249 | 509,592 | 06-Feb-2015 | 00:48 |
| msvcr120_clr0400.dll | 12.0.51689.34249 | 869,536 | 06-Feb-2015 | 01:01 |
| msvcr120_clr0400.dll | 12.0.51689.34249 | 875,688 | 06-Feb-2015 | 00:48 |
LDR service branch
| File name | File version | File size | Date | Time |
|---|---|---|---|---|
| Aspnet_perf.dll | 4.0.30319.36285 | 45,200 | 04-Feb-2015 | 14:24 |
| Aspnet_perf.dll | 4.0.30319.36285 | 41,616 | 04-Feb-2015 | 14:13 |
| aspnet_wp.exe | 4.0.30319.36285 | 47,752 | 04-Feb-2015 | 14:24 |
| aspnet_wp.exe | 4.0.30319.36285 | 43,152 | 04-Feb-2015 | 14:13 |
| System.Web.ApplicationServices.dll | 4.0.30319.36285 | 62,680 | 04-Feb-2015 | 13:12 |
| System.Web.Extensions.dll | 4.0.30319.36285 | 1,850,560 | 04-Feb-2015 | 13:12 |
| System.Web.dll | 4.0.30319.36285 | 5,450,888 | 04-Feb-2015 | 14:24 |
| System.Web.dll | 4.0.30319.36285 | 5,457,560 | 04-Feb-2015 | 13:12 |
| System.Web.Mobile.dll | 4.0.30319.36285 | 839,848 | 04-Feb-2015 | 13:12 |
| webengine.dll | 4.0.30319.36285 | 26,760 | 04-Feb-2015 | 14:24 |
| webengine.dll | 4.0.30319.36285 | 24,712 | 04-Feb-2015 | 14:13 |
| webengine4.dll | 4.0.30319.36285 | 621,192 | 04-Feb-2015 | 14:24 |
| webengine4.dll | 4.0.30319.36285 | 509,576 | 04-Feb-2015 | 14:13 |
| msvcr120_clr0400.dll | 12.0.52285.36285 | 869,544 | 04-Feb-2015 | 14:24 |
| msvcr120_clr0400.dll | 12.0.52285.36285 | 875,688 | 04-Feb-2015 | 14:13 |
Affected versions of .NET Framework by this security bulletin
| Windows version | Updates to install |
|---|---|
| Windows Vista SP2 and Windows Server 2008 SP2 | 3037573 for .NET Framework 2.0 SP2 3037578 for .NET Framework 4 3037581 for .NET Framework 4.5/4.5.1/4.5.2 |
| Windows 7 SP1 and Windows Server 2008 R2 SP1 | 3037574 for .NET Framework 3.5.1 3037578 for .NET Framework 4 3037581 for .NET Framework 4.5/4.5.1/4.5.2 |
How to obtain help and support for this security update
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
Local support according to your country: International Support
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
Local support according to your country: International Support
Applies to
This article applies to the following:- Microsoft .NET Framework 4.5.2 when used with:
- Windows Server 2008 R2 Service Pack 1
- Windows 7 Service Pack 1
- Windows Server 2008 Service Pack 2
- Windows Vista Service Pack 2
- Microsoft .NET Framework 4.5.1 when used with:
- Windows Server 2008 R2 Service Pack 1
- Windows 7 Service Pack 1
- Windows Server 2008 Service Pack 2
- Windows Vista Service Pack 2
- Microsoft .NET Framework 4.5 when used with:
- Windows Server 2008 R2 Service Pack 1
- Windows 7 Service Pack 1
- Windows Server 2008 Service Pack 2
- Windows Vista Service Pack 2
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