Unknown attackers are sabotaging popular TV and movie torrents by flooding swarms with IPv6 peers. The vulnerability, which affects the popular uTorrent client, makes it nearly impossible for torrent users to download files.
Because of its focus on IPv6, not all users are affected, but those who are sometimes see their download speeds grind to a halt.
The fake peers never exchange any data but keep the client busy until they are banned.
The attack has been confirmed to affect the popular client uTorrent. After a few minutes uTorrent does ban the malicious peers, but this makes little difference as the attackers use so many different IP-addresses.
Because all the fake peers have filled up the connection slots, real peers can no longer connect. This means that hardly any real data is transferred.
Without an immediate fix, the tracker operator is advising affected users to switch to a different client for the time being, or disable IPv6 in Windows (not recommended for Windows 7 and up), if that’s an option.
The IPv6 addresses which are used appear to be fictional. They haven’t been allocated yet and are non-routable.