Mozilla VPN, a popular client for Linux, recently came under scrutiny after a security engineer at SUSE discovered a serious flaw in its authentication check process. The vulnerability, found in version 2.14.1, allows any user on a system to manipulate VPN settings, redirect network traffic, and break existing VPN connections. This article delves into the details of the flaw, its impact, and the disclosure process that led to its exposure. Additionally, we explore essential factors to consider when choosing a VPN service, along with a comparison of some of the best VPNs available today.

Mozilla VPN Vulnerability: A Closer Look

The broken authentication check in Mozilla VPN version 2.14.1 was first identified when the openSUSE community manager sought to include the client in their Linux distribution. The SUSE security team discovered a privileged D-Bus service running as root with incorrect authorization logic. This flaw allowed the D-Bus call to work for any user account, regardless of their privileges, leading to potential malicious activities.

The consequences of this vulnerability are severe. Arbitrary local users can configure unauthorized VPN setups, mislead users into believing a secure VPN connection is in place when it is not, launch denial-of-service attacks on existing VPN connections, and perpetrate other integrity violations.

The flaw was privately disclosed to Mozilla on May 4 but received no response until June 12 when it was disclosed in a GitHub pull request. SUSE’s security team, after 90 days of waiting, posted publicly about the flaw on August 3. Mozilla assigned CVE-2023-4104 to this vulnerability and intends to eliminate Polkit authentication in the upcoming v2.16.0 release. However, the flaw persists since various D-Bus methods remain unauthenticated and accessible by any local user.

Factors To Consider When Picking a VPN

When selecting a VPN service, users must consider several crucial factors to ensure they get the best protection and performance:

Best VPNs on the Market Right Now

With a myriad of VPN services available, it can be challenging to choose the best one for your needs. This article presents three top VPN providers known for their robust security, extensive server networks, and user-friendly interfaces.


PrivateVPN is a highly regarded VPN service that excels in both security and performance. With military-grade encryption and support for various protocols, including OpenVPN and IKEv2/IPsec, PrivateVPN ensures that your online activities remain private and protected from prying eyes. It boasts a strict no-logs policy, offering users peace of mind knowing their data is not stored or tracked.

One of PrivateVPN’s standout features is its server network. Despite being a smaller provider, it has servers in over 60 countries, enabling users to access geo-restricted content and bypass censorship. Moreover, PrivateVPN’s servers deliver impressive speeds, making it ideal for streaming, gaming, and downloading.

The user-friendly apps are available on all major platforms, and the customer support team is responsive and knowledgeable. PrivateVPN allows up to six simultaneous connections on a single account, making it an excellent choice for families or individuals with multiple devices.


NordVPN is a household name in the VPN industry, renowned for its comprehensive security features and expansive server network. It employs AES-256 encryption coupled with Double VPN and CyberSec technologies, ensuring top-notch data protection and blocking of ads and malware.

With an astonishing global presence, NordVPN operates more than 5,500 servers in 59 countries. This vast network enables users to access content from around the world and experience fast and stable connections. NordVPN’s SmartPlay feature automatically bypasses geo-restrictions, making it an excellent option for streaming enthusiasts.

NordVPN’s user-friendly apps are available on various platforms and allow up to six simultaneous connections. The service also offers specialized servers for specific needs, such as dedicated IP addresses and Onion over VPN for enhanced anonymity.


ExpressVPN is widely regarded as one of the fastest and most reliable VPNs on the market. Its robust security measures include AES-256 encryption, support for multiple protocols, and a TrustedServer technology that ensures data integrity by running entirely on RAM.

Operating servers in more than 160 locations across 90+ countries, ExpressVPN provides users with an extensive server network for bypassing geo-blocks and accessing global content. The service’s high-speed connections make it perfect for streaming high-definition content and engaging in lag-free online activities.

ExpressVPN’s user-friendly apps are compatible with all major devices and offer features like split tunneling and a Network Lock kill switch. The service allows up to five simultaneous connections, and its customer support is available 24/7 via live chat.

Final words

When selecting a VPN, factors such as security, server network, speed, and customer support are crucial in ensuring a seamless and secure online experience. PrivateVPN, NordVPN, and ExpressVPN are among the best VPNs on the market right now, each excelling in different aspects. Whether you prioritize strict privacy policies, extensive server coverage, or lightning-fast speeds, these top-tier VPN providers have got you covered. Evaluate your specific needs and choose the one that best aligns with your online security and accessibility requirements.


A Virtual Private Network (VPN) is a security tool that establishes an encrypted and secure connection between your device and the internet. It works by routing your internet traffic through a remote server operated by the VPN provider. This process masks your IP address and encrypts your data, enhancing online privacy and security.

VPNs offer several benefits, including:

Yes, VPNs are generally legal in most countries. However, some nations may impose restrictions or ban VPN usage, so it’s essential to check local regulations before using one.

Yes, using a VPN can potentially reduce your internet speed. The encryption and rerouting of data through a VPN server may cause a slight slowdown. However, reputable VPN providers strive to minimize this impact, and in some cases, you might not notice any significant difference.

No, the level of security provided by VPNs can vary. It’s crucial to choose a reputable and trustworthy VPN service with robust encryption protocols and a strict no-logs policy. Trusted VPNs will prioritize user privacy and implement measures to protect your data from unauthorized access.