Windows Hyper-V Remote Code Execution Vulnerability

Source data

Overview

Stack-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code over a network.

Impact & technical details

Remote Code Execution

According to the CVSS metric, the attack vector is network (AV:N) and the attack complexity is low (AC:L). What does that mean for this vulnerability? The attack vector is Network (AV:N) because this vulnerability is remotely exploitable and can be exploited from the internet. The attack complexity is Low (AC:L) because an attacker does not require significant prior knowledge of the system and can achieve repeatable success with the payload against the vulnerable component.

How could an attacker exploit this vulnerability? This vulnerability would require an authenticated attacker on a guest VM to send specially crafted file operation requests on the VM to hardware resources on the VM which could result in remote code execution on the host server.

How could an attacker exploit this vulnerability? By leveraging malicious TPM commands from a guest VM to a target running Hyper-V, an attacker can cause an out of bounds write in the root partition.

CVSS base score

9.8 / 10

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Highest base score supplied by MSRC for this record; the vector belongs to that score. Ratings can vary by product. Microsoft Important is displayed as High; Moderate is displayed as Medium.

Affected products

• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows 10 Version 21H2 for 32-bit Systems
• Windows 10 Version 21H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows 10 Version 22H2 for 32-bit Systems

Source guidance

Remediation

The source provides update references without a separate remediation summary. Review the applicable update links below.

At least one Microsoft vendor-fix reference is available. Check each affected product for its applicable update, prerequisites, and supported version.

Authoritative sources & updates

Findings and update information come from the linked publishers. GTP compiles the public record and provides the recommendation above. CVSS ratings shown here come from Microsoft. NVD references provide additional public context.

• Microsoft Security Response Center (opens in a new tab)
• Microsoft security update · 5122876 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5122882 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5122878 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5122871 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5124008 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5122880 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5124012 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5123099 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)