Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1 Hyper-V RemoteFX vGPU input validation

Summaryinfo

A vulnerability was found in Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1. It has been declared as critical. This affects an unknown function of the component Hyper-V RemoteFX vGPU. The manipulation results in input validation. This vulnerability was named CVE-2020-1041. The attack needs to be approached within the local network. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1 (Operating System). Affected is some unknown processing of the component Hyper-V RemoteFX vGPU. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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-2020-1040, CVE-2020-1042, CVE-2020-1043.

The weakness was presented 07/14/2020 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2020-1041. Access to the local network is required for this attack to succeed. Required for exploitation is a authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/15/2020). 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.

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

See VDB-157972, VDB-157971, VDB-157970 and VDB-157969 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

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

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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