Junglewise Threat Intelligence

CVE-2020-1054: Microsoft Win32k Privilege Escalation Vulnerability

CVE-2020-1054 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

Technologies: Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows 10, Microsoft Windows Server 2012, Microsoft Windows Server 2019, Microsoft Win32K, Microsoft Windows Server 2008, Microsoft Windows Server 2016, Microsoft Windows Rt 8.1. Vendors: Microsoft.

Executive brief

An elevation of privilege vulnerability exists in the Windows kernel-mode driver (Win32k) due to improper handling of objects in memory. Successful exploitation allows a local attacker to execute arbitrary code in kernel mode via an out-of-bounds write.

Affected products

  • Microsoft Windows 7 Service Pack 1
  • Microsoft Windows 8.1
  • Microsoft Windows RT 8.1
  • Microsoft Windows 10 1507, 1607, 1709, 1803, 1809, 1903, 1909
  • Microsoft Windows Server 2008 Service Pack 2, R2 Service Pack 1
  • Microsoft Windows Server 2012 Gold, R2
  • Microsoft Windows Server 2016 Gold, 1803, 1903, 1909
  • Microsoft Windows Server 2019

Timeline

  • 2020-05-12: patched: MSRC advisory and patch released
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: disclosed: NVD publication date

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