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.NET Core Denial of Service And Information Disclosure Vulnerabilities (Windows)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
This host is installed with .NET Core and is prone to denial of service and information disclosure vulnerabilities.
Insight
Insight
Multiple flaws are due to, - .NET (Core) server applications providing WebSocket endpoints could be tricked into endlessly looping while trying to read a single WebSocket frame. - A JWT token is logged if it cannot be parsed.
Affected Software
Affected Software
.NET Core runtime 5.0 before 5.0.9, 3.1 before 3.1.18, and 2.1 before 2.1.29 and .NET Core SDK 5.0 before 5.0.206, 3.1 before 3.1.118, and 2.1 before 2.1.525.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade .NET Core runtimes to versions 5.0.9 or 3.1.18 or 2.1.29 or later or upgrade .NET Core SDK to versions 5.0.206 or 5.0.303 or 3.1.118 or 3.1.412 or 2.1.525 or 2.1.817 or later.