Golden Frog VyprVPN up to 2.12.1.8015 on Windows Service SetProperty AdditionalOpenVpnParameters access control

Summaryinfo

A vulnerability marked as critical has been reported in Golden Frog VyprVPN up to 2.12.1.8015 on Windows. This issue affects the function SetProperty of the component Service. The manipulation of the argument AdditionalOpenVpnParameters leads to access control. This vulnerability is referenced as CVE-2018-10645. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in Golden Frog VyprVPN up to 2.12.1.8015 on Windows and classified as critical. This issue affects the function SetProperty of the component Service. The manipulation of the argument AdditionalOpenVpnParameters with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Golden Frog VyprVPN 2.12.1.8015 for Windows suffers from a SYSTEM privilege escalation vulnerability through the "VyprVPN" service. This service establishes a NetNamedPipe endpoint that allows applications to connect and call publicly exposed methods. The "SetProperty" method allows an attacker to configure the "AdditionalOpenVpnParameters" property and control the OpenVPN command line. Using the OpenVPN "plugin" parameter, an attacker may 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. This attack may be conducted using "VyprVPN Free" account credentials and the VyprVPN Desktop Client.

The bug was discovered 05/01/2018. The weakness was published 05/02/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-10645 since 05/02/2018. Attacking locally is a requirement. A simple authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Golden Frog

Name

• VyprVPN

Version

• 2.12.1.8015

CPE 2.3info

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CPE 2.2info

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