Red Hat: CVE-2020-1045: CVE-2020-1045 dotnet: ASP.NET cookie prefix spoofing vulnerability (Multiple Advisories)

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.