#VU26777 Buffer overflow in Windows and Windows Server - CVE-2020-0917

Vulnerability identifier: #VU26777

Vulnerability risk: Medium

CVSSv4.0: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-0917

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: Yes

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

Vendor: Microsoft

Description

The vulnerability allows a remote user to escalate privileges on the target system.

The vulnerability exists due to a boundary error in the Windows Hyper-V on a host server. A remote administrator on the local network can trigger memory corruption and gain elevated privileges on a target operating system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1809 10.0.17763.1, 10 1903 10.0.18362.116, 10 1909 10.0.18363.476

Windows Server: 2019 10.0.17763.1 - 2019 1909

---

External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0917

---

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.