irsl / cve-2020-1313 Goto Github PK
View Code? Open in Web Editor NEWProof of concept exploit of Windows Update Orchestrator Service Elevation of Privilege Vulnerability
Proof of concept exploit of Windows Update Orchestrator Service Elevation of Privilege Vulnerability
Nice bug,
The reason OleView.NET fails is the CLSID is registered with both InProcServer and LocalServer entries.
PS> $c = Get-ComClass -Clsid '9C695035-48D2-4229-8B73-4C70E756E519'
PS> $c.Servers
Key Value
--- -----
InProcServer32 C:\WINDOWS\System32\usosvc.dll
LocalServer32 <APPID HOSTED>
When enumerating interfaces I use CLSCTX_SERVER which combines all server types, the COM runtime sees the InProc registration and uses that, which doesn't support the CLSID and so fails. I might look at a way around that as there are probably other similar cases. You can enumerate using PowerShell though by creating the object manually and using the Get-ComInterface command on the new object. e.g.
PS> $o = New-ComObject -Class $c -ClassContext LOCAL_SERVER
PS> Get-ComInterface -Object $o
Name IID HasProxy HasTypeLib
---- --- -------- ----------
IUnknown 00000000-0000-0000-c000-000000000046 False False
IMarshal 00000003-0000-0000-c000-000000000046 False False
IUniversalOrchest... 33a57561-f713-4d31-b401-9ef72a564133 True False
IUniversalOrchest... 598915fe-e7db-4abc-8cb7-d5498c6f71e4 True False
IUniversalOrchest... c53f3549-0dbf-429a-8297-c812ba00742d True False
Hope that's useful.
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