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

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1. Affected by this vulnerability is an unknown functionality of the component Hyper-V RemoteFX vGPU. Performing a manipulation results in input validation. This vulnerability is identified as CVE-2020-1036. The attack can only be performed from the local network. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows 2012/2012 R2/2016/Server 2008 R2 SP1 (Operating System). This affects some unknown functionality 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. 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-2020-1040, CVE-2020-1041, CVE-2020-1042, CVE-2020-1043.

The weakness was released 07/14/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2020-1036. The attack can only be initiated within the local network. A authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (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.

Entries connected to this vulnerability are available at VDB-157975, VDB-157974, VDB-157973 and VDB-157972. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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