Earlier today, Cloudflare, along with Google and Amazon AWS, disclosed the existence of a novel zero-day vulnerability dubbed the “HTTP/2 Rapid Reset” attack. This attack exploits a weakness in the HTTP/2 protocol to generate enormous, hyper-volumetric Distributed Denial of Service (DDoS) attacks. Cloudflare has mitigated a barrage of these attacks in recent months, including an […]
Tag Archives: ddos
HTTP/2 Rapid Reset: deconstructing the record-breaking attack
Starting on Aug 25, 2023, we started to notice some unusually big HTTP attacks hitting many of our customers. These attacks were detected and mitigated by our automated DDoS system. It was not long however, before they started to reach record breaking sizes — and eventually peaked just above 201 million requests per second. This […]
Application Security Report: Q2 2023
Cloudflare has a unique vantage point on the Internet. From this position, we are able to see, explore, and identify trends that would otherwise go unnoticed. In this report we are doing just that and sharing our insights into Internet-wide application security trends. This report is the third edition of our Application Security Report. The […]
An August reading list about online security and 2023 attacks landscape
In 2023, cybersecurity continues to be in most cases a need-to-have for those who don’t want to take chances on getting caught in a cyberattack and its consequences. Attacks have gotten more sophisticated, while conflicts (online and offline, and at the same time) continue, including in Ukraine. Governments have heightened their cyber warnings and put […]
DDoS threat report for 2023 Q2
Welcome to the second DDoS threat report of 2023. DDoS attacks, or distributed denial-of-service attacks, are a type of cyber attack that aims to disrupt websites (and other types of Internet properties) to make them unavailable for legitimate users by overwhelming them with more traffic than they can handle — similar to a driver stuck […]
Introducing Cloudflare’s new Network Analytics dashboard
We’re pleased to introduce Cloudflare’s new and improved Network Analytics dashboard. It’s now available to Magic Transit and Spectrum customers on the Enterprise plan. The dashboard provides network operators better visibility into traffic behavior, firewall events, and DDoS attacks as observed across Cloudflare’s global network. Some of the dashboard’s data points include: Top traffic and […]
DDoS threat report for 2023 Q1
Welcome to the first DDoS threat report of 2023. DDoS attacks, or distributed denial-of-service attacks, are a type of cyber attack that aim to overwhelm Internet services such as websites with more traffic than they can handle, in order to disrupt them and make them unavailable to legitimate users. In this report, we cover the […]
How to Know If You’re Under DDoS Attack
Nowadays, the term DDoS raises the heart rate of most webmasters. Though many don’t know exactly what a DDoS attack is, they might be familiar with the effects of getting DDoSed: an extremely sluggish, shut down, or dysfunctional website. In this article, we’ll focus on how to know if you’ve been DDoSed, how to spot […]
Cloudflare mitigates record-breaking 71 million request-per-second DDoS attack
This was a weekend of record-breaking DDoS attacks. Over the weekend, Cloudflare detected and mitigated dozens of hyper-volumetric DDoS attacks. The majority of attacks peaked in the ballpark of 50-70 million requests per second (rps) with the largest exceeding 71 million rps. This is the largest reported HTTP DDoS attack on record, more than 35% […]
Uptick in healthcare organizations experiencing targeted DDoS attacks
Healthcare in the crosshairs Over the past few days, Cloudflare, as well as other sources, have observed healthcare organizations targeted by a pro-Russian hacktivist group claiming to be Killnet. There has been an increase in the amount of healthcare organizations coming to us to help get out from under these types of attacks. Multiple healthcare […]
