A vulnerability classified as critical was found in Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1 (Operating System). Affected by this vulnerability is an unknown function of the component Hyper-V RemoteFX vGPU. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1032, CVE-2020-1036, CVE-2020-1041, CVE-2020-1042, CVE-2020-1043.

The weakness was shared 07/14/2020 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2020-1040. The attack needs to approached within the local network. The successful exploitation requires a single authentication. Technical details are unknown but an exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/19/2024). The advisory points out:

A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system, attacking certain third-party video drivers running on the Hyper-V host. This could then cause the host operating system to execute arbitrary code.

It is declared as highly functional. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries 157973, 157972, 157971 and 157970 are related to this item.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 2012
• 2012 R2
• 2016
• Server 2008 R2 SP1

License

• commercial

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