Multiple vulnerabilities have been reported in Microsoft .Net Framework, which could be exploited by an unauthenticated remote attacker to cause a denial of service against .NET applications.

Denial of Service Vulnerability in .NET Framework and .NET Core
(CVE-2019-0820)

A denial of service (DoS) vulnerability exists in the way that RegEx strings are processed by .NET Framework and .NET Core. This vulnerability can be exploited by a remote unauthenticated attacker by issuing specially crafted requests to a .NET application.

Successful exploitation of this vulnerability could cause Denial of Service against a .NET application.

Denial of Service Vulnerability in .NET Framework (CVE-2019-0864)

A denial of service (DoS) vulnerability exists due to improper handling of heap memory by .NET Framework. This vulnerability can be exploited by an attacker by running a specially crafted application.

Successful exploitation of this vulnerability could cause Denial of Service against a .NET application.

CVE-2019-0980, CVE-2019-0981, CVE-2019-0982

Denial of service (DoS) vulnerabilities exist due to improper handling of web requests by .NET Framework and .NET Core. This vulnerability can be exploited by a remote unauthenticated attacker by issuing specially crafted
requests to the .NET Framework or .NET Core application.

Windows DHCP Client Remote Code Execution Vulnerability

This vulnerability exists in Windows DHCP client due to improper handling of certain DHCP responses. A remote attacker could exploit this vulnerability by sending specially crafted DHCP responses.

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