CVE-2018-11479 : The VPN component in Windscribe 1.81 uses the OpenVPN client for connections. Al

The VPN component in Windscribe 1.81 uses the OpenVPN client for connections. Also, it creates a WindScribeService.exe system process that establishes a \\.\pipe\WindscribeService named pipe endpoint that allows the Windscribe VPN process to connect and execute an OpenVPN process or other processes (like taskkill, etc.). There is no validation of the program name before constructing the lpCommandLine argument for a CreateProcess call. An attacker can run any malicious process with SYSTEM privileges through this named pipe.

Published 2018-05-25 19:29:00

Updated 2020-02-05 21:15:11

Source MITRE

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2018-11479

Windscribe » Windscribe » Version: 1.81
cpe:2.3:a:windscribe:windscribe:1.81:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2018-11479

EPSS FAQ

0.18%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 55 %

Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2018-11479

Windscribe WindscribeService Named Pipe Privilege Escalation

Disclosure Date: 2018-05-24

First seen: 2020-04-26

exploit/windows/local/windscribe_windscribeservice_priv_esc

The Windscribe VPN client application for Windows makes use of a Windows service `WindscribeService.exe` which exposes a named pipe `\.\pipe\WindscribeService` allowing execution of programs with elevated privileges. Windscribe versions prior to 1.

More information

CVSS scores for CVE-2018-11479

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-11479

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-11479

http://packetstormsecurity.com/files/156222/Windscribe-WindscribeService-Named-Pipe-Privilege-Escalation.html

Windscribe WindscribeService Named Pipe Privilege Escalation ≈ Packet Storm
http://sqlulz.blogspot.com/2018/05/windscribe-vpn-privilege-escalation.html

vmcs: WindScribe VPN Privilege Escalation
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