CVE-2021-1704: Windows Hyper-V Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.3)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Jan

Released

2021-01-12

EPSS Score

0.56% (percentile: 68.5%)

Affected Products (23)

Windows

• Windows Server, version 20H2 (Server Core Installation)
• Windows 10 Version 1803 for x64-based Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows 10 Version 1909 for x64-based Systems
• Windows Server, version 1909 (Server Core installation)
• Windows 10 Version 2004 for x64-based Systems
• Windows Server, version 2004 (Server Core installation)
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)
• Windows 8.1 for x64-based systems

ESU

• Windows 7 for x64-based Systems Service Pack 1
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
• 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)

• 4598242
• 4598245
• 4598230
• 4598229
• 4598231
• 4598243
• 4598279
• 4598289
• 4598285
• 4598275
• 4598288
• 4598287
• 4598278
• 4598297

Acknowledgments

@EranShimony CyberaArk

Revision History

• 2021-01-12: Information published.