SB2021081011 - Multiple vulnerabilities in Microsoft .NET Core and Visual Studio

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2021-34532)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the ASP.NET Core and Visual Studio. A local user can gain unauthorized access to sensitive information on the system.

2) Information disclosure (CVE-ID: CVE-2021-34485)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the .NET Core and Visual Studio. A local user can gain unauthorized access to sensitive information on the system.

3) Input validation error (CVE-ID: CVE-2021-26423)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the .NET Core and Visual Studio. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34532
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423