Vulnerability Note VU#278204

The Verizon FIOS Actiontec router model MI424WR-GEN3I is susceptible to cross-site request forgery attacks. (CWE-352) A remote attacker that is able to trick a user into clicking a malicious link while logged into the router may be able to compromise the router.

A remote unauthenticated attacker that is able to trick a user into clicking a malicious link while they are logged into the router may be able to compromise the router.

We are currently unaware of a practical solution to this problem. Please consider the following workarounds.

Restrict Access

Verify the router's web interface is not Internet accessible. As a general good security practice, only allow connections from trusted hosts and networks. Note that restricting access does not prevent CSRF attacks since the attack comes as an HTTP request from a legitimate user's host. Restricting access would prevent an attacker from accessing the router web interface using stolen credentials from a blocked network location.

Do Not Stay Logged Into the Router's Management Interface

Always log out of the router's management interface when done using it.