CVE-2021-26423 : Security Advisory and Response

A denial of service vulnerability affecting .NET Core and Visual Studio has been disclosed by Microsoft. This vulnerability has a HIGH severity base score of 7.5.

Understanding CVE-2021-26423

This CVE identifies a denial of service vulnerability impacting various Microsoft products, including Visual Studio and .NET Core.

What is CVE-2021-26423?

The CVE-2021-26423 pertains to a denial of service vulnerability in .NET Core and Visual Studio, allowing attackers to disrupt the normal functioning of the affected systems.

The Impact of CVE-2021-26423

The impact of this vulnerability is rated as HIGH with a base severity score of 7.5 according to the CVSS v3.1 metrics.

Technical Details of CVE-2021-26423

This section outlines the technical details of the CVE-2021-26423 vulnerability.

Vulnerability Description

The vulnerability allows attackers to perform denial of service attacks, disrupting the services provided by .NET Core and Visual Studio versions.

Affected Systems and Versions

Several versions of Microsoft Visual Studio 2017, 2019, .NET Core, and PowerShell Core are impacted by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to cause a denial of service by sending specially crafted requests to the affected systems.

Mitigation and Prevention

Discover the necessary steps to mitigate the risks associated with CVE-2021-26423.

Immediate Steps to Take

Update the affected Microsoft Visual Studio, .NET Core, and PowerShell Core versions to the latest releases to mitigate the risk of exploitation.

Long-Term Security Practices

Implement strict input validation, firewall rules, and network segmentation to enhance the overall security posture of the systems.

Patching and Updates

Regularly check for security updates from Microsoft and apply patches promptly to address known vulnerabilities.