Vulnerability identifier: #VU55693

Vulnerability risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34485

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Visual Studio
Universal components / Libraries / Software for developers
ASP.NET Core MVC
Universal components / Libraries / Software for developers
Microsoft .NET Core
Server applications / Frameworks for developing and running applications

Vendor: Microsoft

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Visual Studio: 15.9, 16.4.0 16.4.29519.181

ASP.NET Core MVC: 2.1.0

Microsoft .NET Core: 3.1

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.