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In-the-wild DDoSes use new way to achieve unthinkable sizes

Postby MrFredPFL » Tue Feb 27, 2018 10:53 pm

Story : https://arstechnica.com/information-technology/2018/02/in-the-wild-ddoses-use-ne





DDoS vandals have long intensified their attacks by sending a small number of specially designed data packets to publicly available services. The services then unwittingly respond by sending a much larger number of unwanted packets to a target. The best known vectors for these DDoS amplification attacks are poorly secured domain name system resolution servers, which magnify volumes by as much as 50 fold, and network time protocol, which increases volumes by about 58 times.

On Tuesday, researchers reported attackers are abusing a previously obscure method that delivers attacks 51,000 times their original size, making it by far the biggest amplification method ever used in the wild. The vector this time is memcached, a database caching system for speeding up websites and networks. Over the past week, attackers have started abusing it to deliver DDoSes with volumes of 500 gigabits per second and bigger, DDoS mitigation service Arbor Networks reported in a blog post.

Officials at content delivery network Cloudflare, which reported the attacks here, said the attacks they're seeing come from fewer than 6,000 memcached servers that are reachable on the Internet. Searches show there are more than 88,000 such servers, an indication there is potential for attacks to get much bigger.

"That's an exceptionally large amplification factor," said John Graham-Cumming, CTO of content delivery network Cloudflare, who added that that's the biggest amplification factor he has ever seen. "I would expect over the next week or so we'll see some very large attacks of over one terabit per second coming from it."







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Re: In-the-wild DDoSes use new way to achieve unthinkable si

Postby ejonesss » Wed Feb 28, 2018 6:02 pm

Cloudflare is advising network providers that deploy memcached servers to disable UDP support when possible


i thought udp could not be tampered with or even stopped i heard somewhere that is why it is used by torrents because the copyright conglomerates could not stop it.
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Re: In-the-wild DDoSes use new way to achieve unthinkable si

Postby MrFredPFL » Thu Mar 01, 2018 3:27 pm

do u believe the unspecified source of that info knows more about this than cloudflare does?
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