CVE-2018-7484 Information

Description

An issue was discovered in PureVPN through 5.19.4.0 on Windows. The client installation grants the Everyone group Full Control permission to the installation directory. In addition the PureVPNService.exe service which runs under NT Authority\SYSTEM privileges tries to load several dynamic-link libraries using relative paths instead of the absolute path. When not using a fully qualified path the application will first try to load the library from the directory from which the application is started. As the residing directory of PureVPNService.exe is writable to all users this makes the application susceptible to privilege escalation through DLL hijacking.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://www.defensecode.com/advisories/DC-2018-02-001-PureVPN-Windows-Privilege-Escalation.pdf https://www.securityfocus.com/archive/1/541803

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8