Many of today's BitTorrent trackers rely on a ratio system to ensure leechers (P2P users who download data but do not share) to a minimum. The ratio system basically tracks a user's upload and download amounts and ensures a fair minimum upload ratio is maintained. Now it looks like an exploit has been found which would allow users to "cheat" a tracker into thinking they had a more favourable ratio than they actually did.
News source: SlashdotRead full story...
News source:
Full Story