Incorrect permission assignment for critical resource in PureVPN - CVE-2018-10204
Published: April 18, 2018 / Updated: August 8, 2020
Vulnerability identifier: #VU37178
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2018-10204
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PureVPN
Affected software:
PureVPN
PureVPN
Detailed vulnerability description
The vulnerability allows a remote authenticated user to execute arbitrary code.
PureVPN 6.0.1 for Windows suffers from a SYSTEM privilege escalation vulnerability in its "sevpnclient" service. When configured to use the OpenVPN protocol, the "sevpnclient" service executes "openvpn.exe" using the OpenVPN config file located at %PROGRAMDATA%purevpnconfigconfig.ovpn. This file allows "Write" permissions to users in the "Everyone" group. An authenticated attacker may modify this file to specify a dynamic library plugin that should run for every new VPN connection attempt. This plugin will execute code in the context of the SYSTEM account.
How to mitigate CVE-2018-10204
Install update from vendor's website.