CVE-2021-41355 : What You Need to Know

On October 13, 2021, CVE-2021-41355 was published, affecting .NET Core, Visual Studio 2019, and PowerShell 7.1.

Understanding CVE-2021-41355

This CVE discloses an information leakage vulnerability in .NET Core and Visual Studio products.

What is CVE-2021-41355?

The CVE-2021-41355 vulnerability leads to information disclosure in several Microsoft products like PowerShell 7.1, Visual Studio 2019, and .NET 5.0.

The Impact of CVE-2021-41355

The vulnerability has a base score of 5.7, categorizing it as a MEDIUM severity issue according to the CVSS v3.1 scoring system.

Technical Details of CVE-2021-41355

This section provides detailed technical insights into the nature of the vulnerability.

Vulnerability Description

The .NET Core and Visual Studio Information Disclosure Vulnerability allows unauthorized disclosure of information.

Affected Systems and Versions

The impacted products include:

PowerShell 7.1 versions 7.1.0 to 7.1.5
Visual Studio 2019 versions 16.0 to 16.9.12
Visual Studio 2019 versions 16.0 to 16.10
.NET 5.0 versions 5.0.0 to 5.0.11

Exploitation Mechanism

The vulnerability can be exploited by attackers to access sensitive information within the affected systems.

Mitigation and Prevention

To address CVE-2021-41355, users should take immediate steps and adopt long-term security practices to prevent exploitation.

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Monitor for any unusual activities on the affected systems.

Long-Term Security Practices

Regularly update software and maintain a secure development environment.
Implement access controls and data encryption mechanisms.
Conduct security audits and penetration testing regularly.

Patching and Updates

Ensure all affected systems are updated with the latest security patches from Microsoft to mitigate the risk of information disclosure.