All vulnerabilities
CVE-2023-28252

Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability

Microsoft WindowsOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 11 Apr 2023. Known ransomware useCISA KEV
Exploit odds (EPSS)49.0%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.17763.4252Also 10.0.20348.1668, 10.0.19042.2846 and 10 moreCVE List
Federal deadline2 May 2023Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

  • 10.0.17763.4252Windows 10 Version 1809CVE List
  • 10.0.17763.4252Windows Server 2019CVE List
  • 10.0.17763.4252Windows Server 2019 (Server Core installation)CVE List
  • 10.0.20348.1668Windows Server 2022CVE List
  • 10.0.19042.2846Windows 10 Version 20H2CVE List
  • 10.0.22000.1817Windows 11 version 21H2CVE List
Show all 22 fixed versions
  • 10.0.19044.2846Windows 10 Version 21H2CVE List
  • 10.0.22621.1555Windows 11 version 22H2CVE List
  • 10.0.19045.2846Windows 10 Version 22H2CVE List
  • 10.0.10240.19869Windows 10 Version 1507CVE List
  • 10.0.14393.5850Windows 10 Version 1607CVE List
  • 10.0.14393.5850Windows Server 2016CVE List
  • 10.0.14393.5850Windows Server 2016 (Server Core installation)CVE List
  • 6.0.6003.22015Windows Server 2008 Service Pack 2CVE List
  • 6.0.6003.22015Windows Server 2008 Service Pack 2 (Server Core installation)CVE List
  • 6.0.6003.22015Windows Server 2008 Service Pack 2CVE List
  • 6.1.7601.26466Windows Server 2008 R2 Service Pack 1CVE List
  • 6.1.7601.26466Windows Server 2008 R2 Service Pack 1 (Server Core installation)CVE List
  • 6.2.9200.24216Windows Server 2012CVE List
  • 6.2.9200.24216Windows Server 2012 (Server Core installation)CVE List
  • 6.3.9600.20919Windows Server 2012 R2CVE List
  • 6.3.9600.20919Windows Server 2012 R2 (Server Core installation)CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 11 Apr 2023Exploit code publicMetasploit
  2. 11 Apr 2023Added to CISA KEVCISA KEV
  3. 11 Apr 2023, 19:13 UTCPublishedCVE List

Public exploit code and templates 1

  • Exploit moduleWindows Common Log File System Driver (clfs.sys) Elevation of Privilege Vulnerability 11 Apr 2023Metasploit

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation.

Text from CVE List

Affected versions 23

  • Windows 10 Version 1809affected: 10.0.17763.0 before 10.0.17763.4252CVE List
  • Windows 10 Version 1809affected: 10.0.0 before 10.0.17763.4252CVE List
  • Windows Server 2019affected: 10.0.17763.0 before 10.0.17763.4252CVE List
  • Windows Server 2019 (Server Core installation)affected: 10.0.17763.0 before 10.0.17763.4252CVE List
  • Windows Server 2022affected: 10.0.20348.0 before 10.0.20348.1668CVE List
  • Windows 10 Version 20H2affected: 10.0.0 before 10.0.19042.2846CVE List
  • Windows 11 version 21H2affected: 10.0.0 before 10.0.22000.1817CVE List
  • Windows 10 Version 21H2affected: 10.0.19043.0 before 10.0.19044.2846CVE List
  • Windows 11 version 22H2affected: 10.0.22621.0 before 10.0.22621.1555CVE List
  • Windows 10 Version 22H2affected: 10.0.19045.0 before 10.0.19045.2846CVE List
  • Windows 10 Version 1507affected: 10.0.10240.0 before 10.0.10240.19869CVE List
  • Windows 10 Version 1607affected: 10.0.14393.0 before 10.0.14393.5850CVE List
  • Windows Server 2016affected: 10.0.14393.0 before 10.0.14393.5850CVE List
  • Windows Server 2016 (Server Core installation)affected: 10.0.14393.0 before 10.0.14393.5850CVE List
  • Windows Server 2008 Service Pack 2affected: 6.0.6003.0 before 6.0.6003.22015CVE List
  • Windows Server 2008 Service Pack 2 (Server Core installation)affected: 6.0.6003.0 before 6.0.6003.22015CVE List
  • Windows Server 2008 Service Pack 2affected: 6.0.6003.0 before 6.0.6003.22015CVE List
  • Windows Server 2008 R2 Service Pack 1affected: 6.1.7601.0 before 6.1.7601.26466CVE List
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation)affected: 6.1.7601.0 before 6.1.7601.26466CVE List
  • Windows Server 2012affected: 6.2.9200.0 before 6.2.9200.24216CVE List
  • Windows Server 2012 (Server Core installation)affected: 6.2.9200.0 before 6.2.9200.24216CVE List
  • Windows Server 2012 R2affected: 6.3.9600.0 before 6.3.9600.20919CVE List
  • Windows Server 2012 R2 (Server Core installation)affected: 6.3.9600.0 before 6.3.9600.20919CVE List

References 4