What is Phlashing

Phlashing is a permanent denial of service (DoS) attack that exploits a vulnerability in network-based firmware updates. Such an attack is currently theoretical but if carried out could render the target device inoperable.

Rich Smith, head of HP's Systems Security Lab, discovered the vulnerability and demonstrated the attack at the EUSecWest security conference in June 2008. In a real-world execution, an attacker could use remote update paths in network hardware, which are often left unprotected, to deliver corrupted and flash this to the device. As a result, the device would become unusable.