A new attack, dubbed TunnelVision, has materialised as a threat to the security of virtual private network (VPN) applications, potentially compromising their ability to protect user data. Researchers have detected vulnerabilities affecting nearly all VPN apps, which could allow attackers to intercept, manipulate, or divert traffic outside of the encrypted tunnel, undermining the fundamental purpose of VPNs.
How TunnelVision Works
TunnelVision exploits a flaw in the Dynamic Host Configuration Protocol (DHCP) server, the system responsible for assigning IP addresses on a network. By manipulating a specific setting called option 121, attackers can divert VPN traffic through the DHCP server, bypassing the encrypted tunnel meant to secure the data. This manipulation allows attackers to intercept, read, drop, or modify the traffic, compromising the user’s privacy and the integrity of the VPN connection.
Implications for VPN Users
The consequences of TunnelVision are severe. Despite users trusting that their data is securely transmitted through the VPN, the reality is that some or all of the traffic may be routed outside of the protected connection. This means that sensitive information, such as passwords, financial details, or personal communications, could be exposed to interception or manipulation by unauthorized parties.
This article has been indexed from CySecurity News – Latest Information Security and Hacking Incidents