#VU29815 Input validation error in Windows Server - CVE-2020-1040

Vulnerability identifier: #VU29815

Vulnerability risk: Low

CVSSv4.0: 7.5 [CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2020-1040

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in Hyper-V RemoteFX vGPU on a host server. A remote authenticated attacker on the local network can run a specially crafted application to execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2008 R2, 2012 R2 - 2012, 2016 10.0.14393.10

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.