The Hidden Dangers of Unsecured VPNs & How to Protect Your Business
The COVID-19 pandemic has forced companies of all sizes to adapt to work-from-home models, driving companies to rely more heavily on VPNs for remote access to their infrastructure and resources. This increased use has heightened security risks, with self-managed VPNs accounting for 63% of remote-access ransomware incidents in 2023. While VPNs provide many benefits, attackers can exploit unmanaged ones to gain access to corporate networks. Once inside the network, attackers can move laterally without being detected, potentially leading to data breaches, business disruption, or the collapse of the entire network. Continuous maintenance and monitoring are essential to mitigate these risks.
What is a Virtual Private Network (VPN)?
A VPN, or Virtual Private Network, is a tool that creates a secure and encrypted connection over a public or private network. It acts as a virtual tunnel that encrypts data transmitted between a user’s device and the VPN server, masking their IP address and providing access to resources as if they were directly connected to a private network.
How can hackers exploit VPN Vulnerabilities?
Recent attacks observed by SensCy show weak authentication methods as the primary vector for VPN compromises, followed by unpatched vulnerabilities. Attackers exploit weak passwords, infrequent password changes, and the absence of Multi-Factor Authentication (MFA) using automated brute force tools. These tools can easily crack weak passwords by attempting multiple combinations until a match is found. MFA mitigates this threat by adding an additional layer of security, requiring not just a password but also a second form of authentication. Unpatched vulnerabilities in outdated software and zero-day exploits also provide accessible entry points for attackers. They use public information, security advisories, and exploit databases to identify and target specific VPN versions. Once vulnerabilities are identified, attackers deploy exploit codes or kits to gain unauthorized network access. Known flaws in outdated VPN authentication protocols are also exploited to bypass security measures and gain unauthorized access.
What can your company do to combat VPN cyber attacks?
To minimize VPN-related risks, SensCy advises companies to adopt proactive security measures. These include regularly updating and patching software to address vulnerabilities, implementing strong authentication methods, and ensuring proper VPN configuration to prevent unauthorized access. SensCy also recommends enforcing time-limited sessions to facilitate regular account verification. Other recommendations include establishing a strong password policy, utilizing Multi-Factor Authentication (MFA), offering a password manager, providing comprehensive user education, and performing regular vulnerability scans.
