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GHSA-hxrm-9w7p-39cc

Cookie parsing failure

Source: GitHub Advisory Database (reviewed) High CVE-2020-1045

Packages

EcosystemPackageAffectedFixed in
NuGet Microsoft.AspNetCore.Http < 2.1.22 2.1.22
NuGet Microsoft.AspNetCore.App < 2.1.22 2.1.22
NuGet Microsoft.Owin < 4.1.1 4.1.1
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-x64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.osx-x64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-arm >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-x64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-x86 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 3.1.0, < 3.1.8 3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-arm64 >= 3.1.5, < 3.1.8 3.1.8

Details

As written in the advisory (Markdown source, shown as plain text).

A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.The ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names., aka 'Microsoft ASP.NET Core Security Feature Bypass Vulnerability'.

References

External links from the advisory. They lead to third-party sites.