CVE-2021-24078: Windows DNS Server Remote Code Execution Vulnerability

Overview

Severity

Critical (CVSS 9.8)

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

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

More Likely

Patch Tuesday

2021-Feb

Released

2021-02-09

EPSS Score

12.44% (percentile: 93.9%)

FAQ

If my server is not configured to be a DNS server, it is vulnerable? No, this vulnerability is only exploitable if the server is configured to be a DNS server.

Affected Products (17)

Windows

• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server, version 1909 (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)

• 4601345
• 4601315
• 4601319
• 4601318
• 4601360
• 4601366
• 4601347
• 4601363
• 4601348
• 4601357
• 4601384
• 4601349

Acknowledgments

Quan Luo from Codesafe Team of Legendsec at Qi'anxin Group

Revision History

• 2021-02-09: Information published.