Rewterz Threat Advisory – CVE-2019-0545 – Microsoft .NET Framework Security Bypass Vulnerability

SEVERITY: Medium

ANALYSIS SUMMARY

CVE-2019-0545
An information disclosure vulnerability exists in .NET Framework and .NET Core which allows bypassing Cross-origin Resource Sharing (CORS) configurations, which is a security bypass.

IMPACT

Security bypass
Information disclosure

AFFECTED PRODUCTS

Microsoft .NET Framework 2.0
Microsoft .NET Framework 3.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
Microsoft .NET Framework 4.5.2
Microsoft .NET Framework 4.6
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5.1
.NET Core 2.2

REMEDIATION

Vendor has released updates for the following products.

Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 (KB4480076):
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480076):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480076

Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 (KB4480072):
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480072):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480072

Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
(KB4480084):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 (KB4480084):
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480084):
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
(KB4480084):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
(KB4480084):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480084):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480084

Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 (KB4480085):
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation) (KB4480085):
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480085):
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480085):
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 (KB4480085):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480085

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (KB4480070):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)
(KB4480070):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480070

Microsoft .NET Framework 4.5.2 on Windows Server 2012 (KB4480075):
Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) (KB4480075):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480075

Microsoft .NET Framework 3.5 on Windows Server 2012 (KB4480083):
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (KB4480083):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480083

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 (KB4480063):
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 (KB4480063):
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation) (KB4480063):
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480063):
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480063):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480063

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (KB4480051):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)
(KB4480051):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480051

Microsoft .NET Framework 4.5.2 on Windows Server 2012 (KB4480058):
Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) (KB4480058):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480058

Microsoft .NET Framework 3.5 on Windows Server 2012 (KB4480061):
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (KB4480061):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480061

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 (KB4480054):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems (KB4480054):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (KB4480054):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation)
(KB4480054):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems (KB4480054):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480054

Microsoft .NET Framework 4.5.2 on Windows RT 8.1 (KB4480057):
Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems (KB4480057):
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (KB4480057):
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) (KB4480057):
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems (KB4480057):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480057

Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems (KB4481484, KB4480064):
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (KB4481484, KB4480064):
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) (KB4481484, KB4480064):
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems (KB4481484, KB4480064):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4481484

Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
(KB4480062):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
(KB4480062):
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
(KB4480062):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
(KB4480062):
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480062):
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (KB4480062):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480062

Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit Systems (KB4480962):
Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems (KB4480962):
Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for x64-based Systems (KB4480962):
Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems (KB4480962):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480962

Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems (KB4480978):
Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems (KB4480978):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480978

Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (KB4480961):
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems (KB4480961):
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) (KB4480961):
Microsoft .NET Framework 3.5 on Windows Server 2016 (KB4480961):
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems (KB4480961):
Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) (KB4480961):
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems (KB4480961):
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems (KB4480961):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480961

Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for ARM64-based Systems (KB4480966):
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for ARM64-based Systems (KB4480966):
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems (KB4480966):
Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) (KB4480966):
Microsoft .NET Framework 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation) (KB4480966):
Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation) (KB4480966):
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems (KB4480966):
Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation) (KB4480966):
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems (KB4480966):
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems (KB4480966):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480966

Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based Systems (KB4480973):
Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems (KB4480973):
Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit Systems (KB4480973):
Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems (KB4480973):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480973

Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for ARM64-based Systems (KB4480978):
Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for ARM64-based Systems (KB4480978):
Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems (KB4480978):
Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems (KB4480978):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480978

Microsoft .NET Framework 4.7.2 on Windows 10 Version 1809 for x64-based Systems (KB4480056):
Microsoft .NET Framework 4.7.2 on Windows Server 2019 (KB4480056):
Microsoft .NET Framework 4.7.2 on Windows Server 2019 (Server Core installation) (KB4480056):
Microsoft .NET Framework 3.5 on Windows 10 Version 1809 for x64-based Systems (KB4480056):
Microsoft .NET Framework 3.5 on Windows Server 2019 (KB4480056):
Microsoft .NET Framework 3.5 on Windows Server 2019 (Server Core installation) (KB4480056):
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1809 for 32-bit Systems (KB4480056):
Microsoft .NET Framework 3.5 on Windows 10 Version 1809 for 32-bit Systems (KB4480056):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480056

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480055):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1
(KB4480055):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (KB4480055):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480055):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480055

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480072):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1
(KB4480072):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (KB4480072):
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480072):

https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480072

Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480059):
Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 (KB4480059):
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation) (KB4480059):
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480059):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480059

Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 (KB4480076):
Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 (KB4480076):
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation) (KB4480076):
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (KB4480076):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4480076