Atlas VPN Zero-Day Vulnerability Exposes Linux Users’ IP Addresses

By   ISBuzz Team
Writer , Information Security Buzz | Sep 06, 2023 06:24 am PST

In a recent revelation, a zero-day vulnerability in the Atlas VPN Linux client has been exposed, putting users at risk of having their real IP addresses leaked. The flaw was publicly disclosed on Reddit, where details of the vulnerability and its exploit code were shared by the individual who first discovered it.

What is Atlas VPN?

Atlas VPN is a popular VPN service that offers both free and premium solutions to users, allowing them to change their IP addresses and encrypt their online connections. The service is available across a range of platforms including Windows, macOS, Linux, Android, iOS, Android TV, and Amazon Fire TV.

The Vulnerability Explained

The vulnerability specifically targets the AtlasVPN client for Linux, version 1.0.3. The Linux Client of Atlas VPN is divided into two segments: a daemon (atlasvpnd) that oversees the connections and a client (atlasvpn) that users utilize to connect, disconnect, and list services. Shockingly, the client does not employ any form of authentication and opens an API on localhost on port 8076. This means any program running on the computer, even a browser, can access this port.

In simpler terms, a malicious script on any website can craft a request to this port, disconnecting the VPN and subsequently revealing the user’s IP address. However, the attack is only feasible if the user is actively using the v1.0.3 of the AtlasVPN Linux client on Linux.

Chris Partridge, a renowned security engineer, tested and confirmed the exploit, demonstrating its potential harm.

Company’s Response

Atlas VPN has acknowledged the vulnerability. Rūta Čižinauskaitė, the company’s head of communications, stated that they are actively working on a fix. She emphasized that once the flaw is addressed, users will be prompted to update their Linux app to the latest version.

Furthermore, the IT Department at Atlas VPN has publicly apologized for their delayed response after the researcher initially reached out to them. They have committed to refining their processes to ensure quicker reactions to such disclosures in the future.

Atlas VPN also plans to incorporate more security checks in their development process to prevent such vulnerabilities. They have urged researchers and others to report potential threats related to their service at [email protected].


This incident serves as a reminder of the importance of cybersecurity vigilance and the need for companies to prioritize user safety. Users of Atlas VPN on Linux are advised to stay updated and watch out for the forthcoming patch to address this vulnerability.

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Jake Moore
Jake Moore , Global Cyber Security Advisor
InfoSec Expert
September 6, 2023 2:25 pm

“Although only a proof of concept, this is a worrying discovery and could heavily damage customer confidence.

Such findings can go on to impact trust in products but furthermore these sorts of discoveries can potentially damage trust in the eyes of others who may not be so familiar with VPN software and its usage.

It is vital to use a VPN to keep data secure and private from prying eyes but users will need to be reminded this is very rare as a good VPN will work tirelessly to protect the user’s IP address.

Linux client users are therefore immediately required to take precautions such as using alternative VPN solution until a patch is released to remain secure and protected.”

Last edited 4 days ago by Jake Moore

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