.NET Core & .NET Framework Denial of Service Vulnerability
Released: May 12, 2020
Last updated: Jun 11, 2020
- Assigning CNA
- Microsoft
- CVE.org link
- CVE-2020-1108
Executive Summary
A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Core or .NET Framework web application. The vulnerability can be exploited remotely, without authentication.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET Core or .NET Framework application.
The update addresses the vulnerability by correcting how the .NET Core or .NET Framework web application handles web requests.
Exploitability
The following table provides an exploitability assessment for this vulnerability at the time of original publication.
- Publicly disclosed
- No
- Exploited
- No
- Exploitability assessment
- Exploitation Less Likely
Acknowledgements
Security Updates
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.
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Disclaimer
Revisions
To comprehensively address CVE-2020-1108, Microsoft has released updates for PowerShell Core 6.2 and PowerShell 7.0. Customers who use any of these versions of PowerShell should install the latest version of PowerShell. See the Release Notes (https://github.com/powershell/announcements/issues/20) for the latest version numbers and instructions for updating PowerShell.
To comprehensively address CVE-2020-1108, Microsoft has released updates for .NET Core 2.1 and .NET Core 3.1. Customers who use any of these versions of .NET Core should install the latest version of .NET Core. See the Release Notes (https://github.com/dotnet/announcements/issues/156) for the latest version numbers and instructions for updating .NET Core.
Revised the Security Updates table to include PowerShell Core 6.2 and 7.0 because they are affected by CVE-2020-1108. See https://github.com/PowerShell/Announcements/issues/20 for more information.
In the Security Updates table, removed Microsoft .NET Framework 3.5 installed on Windows Server 2008 for Itanium-based Systems and Microsoft .NET Framework 3.5.1 installed on Windows Server 2008 R2 for Itanium-based Systems as these versions are no longer supported.
In the Security Updates table, corrected the Download links for .NET Core 2.1 and .NET Core 3.1. This is an informational change only.
Information published.