Microsoft Updates .NET Core, Issues Remote Code Execution Security Advisory -- Visual Studio Magazine

Microsoft Updates .NET Core, Issues Remote Code Execution Security Advisory

By David Ramel
07/15/2020

Microsoft issued security updates for .NET Core while releasing a security advisory about a remote code execution vulnerability.

"Microsoft is aware of a remote code execution vulnerability exists in .NET software when the software fails to check the source markup of an XML file," the company said in a July 14 blog post. "An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.

"A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to an ASP.NET Core application, or other application that parses certain types of XML."

The updates -- .NET Core 2.1.20 and .NET Core 3.1.6 -- restrict the types that are allowed to be present in the XML payload in order to address the vulnerability.

Additional fixes in the release cover a variety of issues in CoreCLR (the runtime for .NET Core), CoreFX (the foundational class libraries for .NET Core) and ASP.NET Core, the web framework.

Getting the update requires downloading .NET Core 3.1.6 and .NET Core SDK and/or .NET Core 2.1.20 and .NET Core SDK,

The fix will be baked in to a future update of the Visual Studio IDE.

More information about the vulnerability can be found in CVE-2020-1147

About the Author

David Ramel is an editor and writer at Converge 360.

Printable Format

comments powered by Disqus

Featured

Hands On: New VS Code Insiders Build Creates Web Page from Image in Seconds

New Vision support with GitHub Copilot in the latest Visual Studio Code Insiders build takes a user-supplied mockup image and creates a web page from it in seconds, handling all the HTML and CSS.
Naive Bayes Regression Using C#

Dr. James McCaffrey from Microsoft Research presents a complete end-to-end demonstration of the naive Bayes regression technique, where the goal is to predict a single numeric value. Compared to other machine learning regression techniques, naive Bayes regression is usually less accurate, but is simple, easy to implement and customize, works on both large and small datasets, is highly interpretable, and doesn't require tuning any hyperparameters.
VS Code Copilot Previews New GPT-4o AI Code Completion Model

The 4o upgrade includes additional training on more than 275,000 high-quality public repositories in over 30 popular programming languages, said Microsoft-owned GitHub, which created the original "AI pair programmer" years ago.
Microsoft's Rust Embrace Continues with Azure SDK Beta

"Rust's strong type system and ownership model help prevent common programming errors such as null pointer dereferencing and buffer overflows, leading to more secure and stable code."
Xcode IDE from Microsoft Archrival Apple Gets Copilot AI

Just after expanding the reach of its Copilot AI coding assistant to the open-source Eclipse IDE, Microsoft showcased how it's going even further, providing details about a preview version for the Xcode IDE from archrival Apple.