The Tesley CPVA 642 routers supplied by Magnet Networks are vulnerable to an offline dictionary attack if the WPA-PSK handshake is obtained by an attacker.

The WPA-PSK pass phrase has the following features:

• Starts with MAGNET0
• Adds six random numerical digits
• 1 million possible combinations ( MAGNET0000000 – MAGNET0999999 )

The entire keyspace can be generated using “mask processor” by ATOM, piping each letter out to its own file, for example:

./mp32 MAGNET0?1?1?1?1?1?1 > magnet_networks_tesley_ks.txt

The .txt file weighs in at around 45mb.

Using a 1.4ghz i3 processor on a budget laptop, we were hitting 1,000 keys per second.  Breakdown below:

• 1,000,000 / 1,000 keys per second = 1,000 seconds
• 1,000 / 60 seconds = 16~ minutes

The WPA-PSK handshake we used has the password MAGNET0349325 and was cracked within ~6 minutes.

On the 20th of June 2016, Magnet Networks Customer Care confirmed via email that these routers are not used by Magnet Networks anymore.

If you’re using the default password on your Magnet Networks Tesley CPVA 642 Router, we recommend changing it immediately to a more secure password, using a mix of letters, numbers and symbols.