Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

Cloudflare

Do hackers eat turkey? And other Thanksgiving Internet trends

Thanksgiving is a tradition celebrated by millions of Americans across six time zones and 50 states, usually involving travel and bringing families together. This year, it was celebrated yesterday, on November 23, 2023. With the Internet so deeply enmeshed into our daily lives, anything that changes how so many people behave is going to also have an impact on online traffic. But how big an impact, exactly?

Introducing hostname and ASN lists to simplify WAF rules creation

If you’re responsible for creating a Web Application Firewall (WAF) rule, you’ll almost certainly need to reference a large list of potential values that each field can have. And having to manually manage and enter all those fields, for numerous WAF rules, would be a guaranteed headache.

Email Routing subdomain support, new APIs and security protocols

It's been two years since we announced Email Routing, our solution to create custom email addresses for your domains and route incoming emails to your preferred mailbox. Since then, the team has worked hard to evolve the product and add more powerful features to meet our users' expectations. Examples include Route to Workers, which allows you to process your Emails programmatically using Workers scripts, Public APIs, Audit Logs, or DMARC Management.

DDoS threat report for 2023 Q3

Welcome to the third 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 in a traffic jam on the way to the grocery store.

How Cloudflare mitigated yet another Okta compromise

On Wednesday, October 18, 2023, we discovered attacks on our system that we were able to trace back to Okta – threat actors were able to leverage an authentication token compromised at Okta to pivot into Cloudflare’s Okta instance. While this was a troubling security incident, our Security Incident Response Team’s (SIRT) real-time detection and prompt response enabled containment and minimized the impact to Cloudflare systems and data.

Introducing the Project Argus Datacenter-ready Secure Control Module design specification

Historically, data center servers have used motherboards that included all key components on a single circuit board. The DC-SCM (Datacenter-ready Secure Control Module) decouples server management and security functions from a traditional server motherboard, enabling development of server management and security solutions independent of server architecture.

Malicious "RedAlert - Rocket Alerts" Application Targets Israeli Phone Calls, SMS, and User Information

More than 5,000 rockets have been launched into Israel since the attacks from Hamas began on October 7th 2023. RedAlert - Rocket Alerts developed by Elad Nava allows individuals to receive timely and precise alerts about incoming airstrikes. Many people living in Israel rely on these alerts to seek safety - a service which has become increasingly important given the newest escalations in the region..

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 was nearly 3x bigger than our previous biggest attack on record.

HTTP/2 Zero-Day Vulnerability Results in Record-Breaking DDoS Attacks

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.