CVE-2021-42291: Active Directory Domain Services Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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-Nov

Released

2021-11-09

Last Updated

2023-01-26

EPSS Score

1.24% (percentile: 79.3%)

FAQ

Where can I find more information about Active Directory permissions updates? See Active Directory permissions updates.

Affected Products (18)

Windows

• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows Server, version 2004 (Server Core installation)
• Windows Server, version 20H2 (Server Core Installation)
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

ESU

• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• 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 (12)

• 5007206
• 5007205
• 5007186
• 5007192
• 5007263
• 5007246
• 5007236
• 5007233
• 5007260
• 5007245
• 5007247
• 5007255

Acknowledgments

Lockheed Martin Red Team, Andrew Bartlett of Catalyst IT

Revision History

• 2021-11-09: Information published.
• 2023-01-26: Added an acknowledgement. This is an informational change only.