CVE-2023-36908: Windows Hyper-V Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2023-Aug

Released

2023-08-08

Last Updated

2023-10-17

EPSS Score

0.19% (percentile: 40.5%)

FAQ

According to the CVSS metric, the Hyper-V attack vector is adjacent (AV:A). What does that mean for this vulnerability? Where the attack vector metric is Adjacent (A), this represents virtual machines connected via a Hyper-V Network Virtualization (HNV) logical network. This configuration forms an isolation boundary where the virtual machines within the virtual network can only communicate with each other. In this attack vector, the vulnerable component is bound to the network stack, but the attack is limited to systems configured to use the HNV network. What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if a Hyper-V Guest attacker successfully exploited this vulnerability is data from the Hyper-V Host.

Affected Products (21)

Windows

• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows 11 version 21H2 for x64-based Systems
• Windows 11 version 21H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 11 Version 22H2 for x64-based Systems
• Windows 10 Version 22H2 for x64-based Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

ESU

• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (14)

• 5029247
• 5029250
• 5029367
• 5029253
• 5029244
• 5029263
• 5029259
• 5029242
• 5029296
• 5029307
• 5029295
• 5029308
• 5029312
• 5029304

Acknowledgments

linfeng of HeBei HuaCe

Revision History

• 2023-08-08: Information published.
• 2023-10-17: Updated one or more CVSS scores for the affected products. This is an informational change only.