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Researchers claim to have detected vulnerabilities in VPN clients that went unnoticed -at least publicly- since 1996

tunnelcrack.mathyvanhoef.com TunnelCrack: Widespread design flaws in VPN clients

We present two widespread design flaws in VPN client. These can be abused to make a victim leak traffic in plaintext outside the protected VPN tunnel.

Tests indicate that every VPN product is vulnerable on at least one device, the researchers say. VPNs for iPhones, iPads, MacBooks, and macOS are extremely likely to be vulnerable, that a majority of VPNs on Windows and Linux are vulnerable, and that Android is the most secure with roughly one-quarter of VPN apps being vulnerable.

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  • I wish they’d been more specific in the general description; this is a local routing attack that can be applied against clients of public VPN services.

    For a moment I was worried about my personal VPN, which is not configured in a way that this abuse could happen.

7 comments