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[VS-2018-023] CyberGhost 6 for Windows Privilege Escalation Vulnerability

CVE ID

CVE-2018-10646

CVSS Score

Pending

Vendor

CyberGhost S.R.L.

Product

CyberGhost 6

Product Version

6.5.0.3180

Vulnerability Details

CyberGhost for Windows suffers from a SYSTEM privilege escalation vulnerability through the CG6Service service. This service establishes an NetNamedPipe endpoint that allows arbitrary installed applications to connect and call publicly exposed methods. The ConnectToVpnServer method accepts a connectionParams argument that provides attacker control of the OpenVpn command line. An attacker can 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 user

Vendor Response

A release is scheduled.

Disclosure Timeline

  • 04-17-2018 - Vendor disclosure via email
  • 04-17-2018 - Vendor disclosure via email
  • 04-17-2018 - Vendor notified via Facebook
  • 04-17-2018 - Vendor response: Received
  • 04-18-2018 - Vendor response and followup
  • 04-20-2018 - Vendor response: Something that will be fixed with the next release
  • 05-01-2018 - Vendor notified of the advisory release

Credit

Fabius Watson of VerSprite Security (@FabiusArtrel)