It only effects those who have installed SSH and not changed the default password. To fix: go into Cydia and use the passwd command to change the default from “alpine”, to something a little more secure.
This worm attacks IP ranges from a larger range of ISPs, including UPC (Netherlands), Optus (Australia), and T-Mobile (Many). When an infected device is hooked up to a Wi-Fi connection, the worm can spread more quickly to more IP addresses than on a typical 3G connection. One symptom noted by security.nl is that battery life is very, very short when the device is connected to WiFi, because the worm is generating so much network activity