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devolo dLAN Cockpit 4.3.1 Unquoted Service Path Privilege Escalation

🗓️ 03 Feb 2019 00:00:00Reported by Stefan PetrushevskiType 
zeroscience
 zeroscience
🔗 www.zeroscience.mk👁 52 Views

devolo dLAN Cockpit 4.3.1 Unquoted Service Path Privilege Escalation impacting DevoloNetworkService for Windows. Authorized non-privileged local user can execute arbitrary code with elevated privileges

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<html><body><p>devolo dLAN Cockpit 4.3.1 Unquoted Service Path Privilege Escalation


Vendor: devolo AG
Product web page: https://www.devolo.com
Affected version: 4.3.1

Summary: devolo dLAN® Cockpit is a software tool that allows devolo
customers to monitor and optimise their dLAN® network using a software
tool.

Desc: The application suffers from an unquoted search path issue
impacting the service 'DevoloNetworkService' for Windows deployed
as part of Devolo dLAN® Cockpit software application. This could
potentially allow an authorized but non-privileged local user to
execute arbitrary code with elevated privileges on the system. A
successful attempt would require the local user to be able to insert
their code in the system root path undetected by the OS or other
security applications where it could potentially be executed during
application startup or reboot. If successful, the local user's code
would execute with the elevated privileges of the application.

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)


Vulnerability discovered by Stefan Petrushevski aka sm
                            @zeroscience


Advisory ID: ZSL-2019-5506
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5506.php


04.10.2017

--


ServiceName                   Path                          StartName                     AbuseFunction
-----------                   ----                          ---------                     -------------
DevoloNetworkService          C:\Program Files\devolo\dl... LocalSystem                   Write-ServiceBinary -Servi...


C:\&gt;sc qc DevoloNetworkService

[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: DevoloNetworkService
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\devolo\dlan\devolonetsvc.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : devolo Network Service
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem
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03 Feb 2019 00:00Current
7.6High risk
Vulners AI Score7.6
CVSS 3.18.4
CVSS 48.5
EPSS0.00023
SSVC
52