Security Only updates for .NET Framework 2.0 SP2, 3.0 SP2, 4.5.2 and 4.6 for Windows Server 2008 SP2 (KB 4345682)

Applies to: .NET Framework 4.6

Summary


This security update resolves an information disclosure vulnerability in Microsoft .NET Framework that could allow an attacker to access information in multi-tenant environments. The vulnerability is caused when .NET Framework is used in high-load/high-density network connections in which content from one stream can blend into another stream.

To exploit the vulnerability, an attacker who can access one tenant in a high-load/high-density environment could potentially trigger multi-tenanted data exposure from one customer to another.

This security update addresses the vulnerability by correcting the way that .NET Framework handles high-load/high-density network connections.

To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8360.

Important

  • All updates for .NET Framework 4.6 for Windows Server 2008 require the d3dcompiler_47.dll update to be installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll update, see KB 4019478.
  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Additional information about this security update


The following articles contain additional information about this security update as it relates to individual product versions.
 
  • 4344176 Description of the Security Only update for .NET Framework 2.0 SP2 and 3.0 SP2 for Windows Server 2008 SP2 (KB 4344176)
  • 4344173 Description of the Security Only update for .NET Framework 4.5.2 for Windows 7 SP1, Server 2008 R2 SP1, and Server 2008 SP2 (KB 4344173)
  • 4344167 Description of the Security Only update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 7 SP1 and Server 2008 R2 SP1, and for .NET Framework 4.6 for Server 2008 SP2 (KB 4344167)

How to obtain help and support for this security update