Veyon 4.4.1 - 'VeyonService' Unquoted Service Path

vendor:

Veyon

by:

Víctor García

6.7

CVSS

MEDIUM

Unquoted Service Path

426

CWE

Product Name: Veyon

Affected Version From: 4.4.1

Affected Version To: 4.4.1

Patch Exists: NO

Related CWE: CVE-2020-15261

CPE: //a:veyon:veyon:4.4.1

Metasploit: N/A

Other Scripts: https://www.infosecmatter.com/nessus-plugin-library/?id=105548

Platforms Tested: Windows 10 Pro x64

2020

Veyon 4.4.1 – ‘VeyonService’ Unquoted Service Path

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.

Mitigation:

Ensure that all services are installed with a fully qualified path name.

Source

Exploit-DB raw data:

# Exploit Title: Veyon 4.4.1 - 'VeyonService' Unquoted Service Path
# Discovery by: Víctor García
# Discovery Date: 2020-03-23
# Vendor Homepage: https://veyon.io/
# Software Link: https://github.com/veyon/veyon/releases/download/v4.4.1/veyon-4.4.1.0-win64-setup.exe
# Tested Version: 4.4.1
# Vulnerability Type: Unquoted Service Path
# Tested on: Windows 10 Pro x64
# CVE: CVE-2020-15261

# Step to discover Unquoted Service Path:

C:\>wmic service get name,displayname,pathname,startmode |findstr /i
"auto" |findstr /i /v "C:\Windows\\" |findstr /i /v """
Veyon Service     VeyonService     C:\Program Files\Veyon\veyon-service.exe


# Service info:

C:\>sc qc VeyonService
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: VeyonService
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files\Veyon\veyon-service.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Veyon Service
        DEPENDENCIES       : Tcpip
                           : RpcSs
        SERVICE_START_NAME : LocalSystem


# Exploit:

# 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.