As you may know, firewire devices can have access to the main memory of a PC thanks to DMA.
Because of this, firewire can be used as an attack vector against a running PC. This not news. Adam Boileau presented this technique back in 2006 but because of recent news, I decided to give it a go and see for myself how easy it is to exploit this attack vector:

Please note that this can also be used for good! Forensic investigators can use this technique to dump the memory of a running PC for investigation.