Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Server 2008 R2 SP1 (KB4507420)

A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a file. An Authentication Bypass vulnerability exists in WCF and WIF, allowing signing of SAML tokens with arbitrary symmetric keys. This vulnerability allows an attacker to impersonate another user. The vulnerability exists in WCF, WIF 3.5 and above in .NET Framework, WIF 1.0 component in Windows, WIF Nuget package, and WIF implementation in Sharepoint. An information disclosure vulnerability exists when Exchange and Azure Active Directory allow creation of entities with Display Names having non-printable characters.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

• CVE-2019-1113
• CVE-2019-1006
• CVE-2019-1083

Important

• All updates for .NET Framework 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, and 4.6 require that the d3dcompiler_47.dll update is 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, see KB 4019990.
• 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.

• 4507004 Description of the Security and Quality Rollup for .NET Framework 3.5.1 for Windows 7 SP1 and Server 2008 R2 SP1 and Server 2008 (KB4507004)
• 4507001 Description of the Security and Quality Rollup for .NET Framework 4.5.2 for Windows 7 SP1 and Server 2008 R2 SP1 and Server 2008 (KB4507001)
• 4506997 Description of the Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 7 SP1 and Server 2008 R2 SP1 and Server 2008 (KB4506997)
• 4506994 Description of the Security and Quality Rollup for .NET Framework 4.8 for Windows 7 SP1 and Server 2008 R2 SP1 and Server 2008 (KB4506994)

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