CVE-2018-11479

Windscribe - WindscribeService Named Pipe Privilege Escalation

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El componente VPN en Windscribe 1.81 emplea el cliente OpenVPN para las conexiones. Además, crea un proceso del sistema WindScribeService.exe que establece un endpoint de tubería nombrada \\.\pipe\WindscribeService que permite que el proceso VPN de Windscribe se conecte y ejecute un proceso OpenVPN u otros (como taskkill, por ejemplo). No hay validación del nombre del programa antes de construir el argumento lpCommandLine para una llamada CreateProcess. Un atacante puede ejecutar cualquier proceso malicioso con privilegios SYSTEM a través de esta tubería nombrada o named pipe.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-05-25 CVE Reserved
2018-05-25 CVE Published
2020-02-07 First Exploit
2023-12-19 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (5)

URL	Tag	Source
http://packetstormsecurity.com/files/156222/Windscribe-WindscribeService-Named-Pipe-Privilege-Escalation.html	X_refsource_misc
http://sqlulz.blogspot.com/2018/05/windscribe-vpn-privilege-escalation.html	Third Party Advisory
http://blog.emingh.com/2018/05/windscribe-vpn-privilege-escalation.html
https://pastebin.com/eLG3dpYK

URL	Date	SRC
https://www.exploit-db.com/exploits/48021	2020-02-07

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Windscribe Search vendor "Windscribe"		Windscribe Search vendor "Windscribe" for product "Windscribe"				1.81 Search vendor "Windscribe" for product "Windscribe" and version "1.81"		-		Affected