PT-2018-10598 · Openvpn+1 · Openvpn+1

Blablabla · Published 2018-05-25 · Updated 2023-12-22 · CVE-2018-11479

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windscribe version 1.81

Description The issue concerns the VPN component in Windscribe, which uses the OpenVPN client and creates a system process named WindScribeService.exe. This process establishes a named pipe endpoint, .pipeWindscribeService, allowing the Windscribe VPN process to connect and execute other processes. However, there is no validation of the program name before constructing the lpCommandLine argument for a CreateProcess call, enabling an attacker to run malicious processes with SYSTEM privileges through this named pipe.

Recommendations For Windscribe version 1.81, as a temporary workaround, consider disabling the WindScribeService.exe system process until a patch is available. Restrict access to the .pipeWindscribeService named pipe endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2018-11479

Affected Products

Openvpn

Windscribe

References · 8

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/windscribe_windscribeservice_priv_esc.rb · Exploit
• 🔥 https://exploit-db.com/exploits/48021 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2018-11479 · Security Note
• https://osv.dev/vulnerability/CVE-2018-11479 · Vendor Advisory
• https://github.com/cyberark/PipeViewer · Note
• http://packetstormsecurity.com/files/156222/Windscribe-WindscribeService-Named-Pipe-Privilege-Escalation.html · Note
• https://t.me/s_e_reborn/4351 · Telegram Post
• http://sqlulz.blogspot.com/2018/05/windscribe-vpn-privilege-escalation.html · Note