#Cyberghost linux download code#
This case is based on two vulnerabilities that can be chained together to achieve code execution by a man-in-the-middle attacker. $ decompyle3 -o out -r cyberghostvpn_extracted Successfully extracted pyinstaller archive: cyberghostvpn Possible entry point: pyi_rth_certifi.pyc Possible entry point: pyi_rth_multiprocessing.pyc
Possible entry point: pyiboot01_bootstrap.pyc $ python3.8 ~/pyinstxtractor/pyinstxtractor.py cyberghostvpn
#Cyberghost linux download software#
The client executes the locally installed VPN software (OpenVPN or Wireguard) with the downloaded configuration.Īfter these two steps, the user’s machine is connected to one of the CyberGhost VPN servers, and all network traffic is routed through it.The client sends an authenticated request to the CyberGhost API to fetch the VPN configuration.When a user decides to connect to the VPN, two important things happen:
Depending on the service type selected, a different underlying protocol is used, and different paths in the code are executed. Users can select their desired VPN server by specifying criteria such as service type (OpenVPN or Wireguard), country, city, and server type (traffic, streaming, or torrent). Once the client is installed, the same account is used to log in to the client. Introductionīefore we delve into the details of specific vulnerabilities, it may be useful to briefly explain how the CyberGhost VPN Linux client works.Įvery CyberGhost user has an account that is used to log in to the management web panel to manage their subscription and download the client for their desired platform. The latest version of the CyberGhostVPN Linux client is now free from these vulnerabilities. This article discloses the vulnerabilities that were present in the CyberGhostVPN Linux 1.3.5 client (and versions below).
During my analysis, I discovered vulnerabilities that could be exploited to achieve local privilege escalation, remote code execution on the user’s machine, or to control the victim’s network traffic. As a Linux user, I was particularly interested in their Linux application and decided to take a closer look at this version of their software. They support many popular platforms, including Windows, macOS, and Linux. CyberGhost is a company that provides VPN services to individual users.
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