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Rewterz Threat Advisory – Multiple Microsoft Windows Vulnerabilities

Severity

High

Analysis Summary

CVE-2021-42274 

Microsoft Windows Hyper-V is vulnerable to a denial of service, caused by a flaw in Discrete Device Assignment (DDA). By sending a specially-crafted request, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.

CVE-2021-42287 

Microsoft Windows could allow a remote authenticated attacker to gain elevated privileges on the system, caused by a flaw in the Active Directory Domain Services. By sending a specially-crafted request, an attacker could exploit this vulnerability to escalate privileges.

Impact

  • Denial of Service
  • Privilege Escalation

Affected Vendors

Microsoft

Affected Products

  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019
  • Microsoft Windows 10 1809 for x64-based Systems
  • Microsoft Windows 10 1607 for x64-based Systems
  • Microsoft Windows 10 2004 for x64-based Systems
  • Microsoft Windows Server version 20H2
  • Microsoft Windows 10 20H2 for x64-based Systems
  • Microsoft Windows Server (Server Core installation) 2019
  • Microsoft Windows Server (Server Core installation) 2004
  • Microsoft Windows Server (Server Core installation) 2016
  • Microsoft Windows 10 21H1 for x64-based Systems
  • Microsoft Windows Server 2022
  • Microsoft Windows Server (Server Core installation) 2022
  • Microsoft Windows 11 x64
  • Microsoft Windows Server 2008 SP2 x32
  • Microsoft Windows Server 2008 SP2 x64
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server version 2004
  • Microsoft Windows Server (Server Core installation) 20H2
  • Microsoft Windows Server (Server Core installation) 2012 R2
  • Microsoft Windows Server (Server Core installation) 2012
  • Microsoft Windows Server for X64-based systems 2008 R2 SP1
  • Microsoft Windows Server for X64-based systems (Server Core installation) 2008 SP2
  • Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
  • Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2 SP1

Remediation

Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.

CVE-2021-42274

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42274

CVE-2021-42287

https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2021-42287