BitTorrent, the old ISP challenger, is now creating a new threat - a way to generate DDoS attacks.
Source: P2P File-Sharing in Hell:
Vulnerabilities to Launch Distributed
Reflective DoS Attacks (here)
While BitTorrent swarms are relatively harmless, a new paper published by City University London researcher Florian Adamsky reveals that there’s potential for abuse.
The paper shows that various BitTorrent protocols can be used to amplify Denial of Service attacks.
BitTorrent Inc has been notified about the vulnerabilities and patched some in a recent beta release. For now, however, uTorrent is still vulnerable to a DHT attack. Vuze was contacted as well but has yet to release an update according to the researcher.
For users of BitTorrent-based software there is no security concern other than the fact that people are participating in a DDoS attack without their knowledge. The vulnerability mostly leads to a lot of wasted bandwidth"
See "BITTORRENT CAN BE EXPLOITED FOR DOS ATTACKS, RESEARCH WARNS" - here.