OpenAI's agent chained decade-old DoS attacks to crash web servers in seconds
Codex drops an HTTP/2 Bomb
Stay updated on DoS threats. Explore the latest news and insights on Denial of Service attacks, prevention tips, and cybersecurity strategies.
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Background for this topic.
Denial of service (DoS) is an attack that makes a system, network, or application unavailable by exhausting resources or triggering failure. Floods can consume bandwidth, connection state, CPU, memory, or request-processing capacity; a software defect may instead be exploited to crash a service. A distributed denial-of-service (DDoS) attack generates traffic from many systems, increasing volume and complicating source-based blocking. The material security impact is loss of availability for users and dependent services, including websites, APIs, DNS, and operational systems.
Mitigation should match the bottleneck. Rate limits, request validation, connection protections, caching, and service isolation can reduce application and state-exhaustion attacks; volumetric traffic generally needs filtering or absorption upstream of the network. Monitoring should distinguish abnormal request patterns from ordinary load and alert on saturation, while tested failover, traffic diversion, and restoration procedures limit outage duration. Vulnerability management and timely patching reduce DoS caused by remotely triggerable crashes, but do not replace capacity planning and resilience testing.
Weekly headline count for the current query.
Codex drops an HTTP/2 Bomb
313 Team tells Canonical: pay up or the packets keep coming
313 Team tells Canonical: pay up or the packets keep coming Canonical says its web infrastructure is under attack after a pro-Iran hacktivist group instructed its members to target the open source giant.…
Millions of hijacked devices powered traffic floods targeting defense systems and beyond The US government has moved to disrupt a cluster of IoT botnets behind some of the largest DDoS attacks ever recorded, including traffic bursts topping 30 terabits per second.…
Kids profited from tools used to attack popular websites, say officials Polish police have referred seven suspected juvenile cybercriminals to family court over an alleged scheme to flog DDoS kits online.…
'Expect elevated activity for the foreseeable future' Iranian hackers have launched spying expeditions, digital probes, and distributed denial of service (DDoS) attacks in the wake of the US and Israel launching missile strikes over the weekend, and security researchers urge organizations to expect more cyber intrusions as the war continues.…
Quartet accused of attacking public institutions, claiming the government was responsible for 2024 tragedy Spanish police say four self-proclaimed members of Anonymous are in custody after allegedly carrying out several cyberattacks on public authorities in the wake of the 2024 DANA floods.…
National rail bookings and timetables disrupted for nearly 24 hours If you wanted to book a train trip in Germany recently, you would have been out of luck. The country's national rail company says that its services were disrupted for hours because of a cyberattack.…
UK leaps to sixth in global flood charts as mega-swarm unleashes 31.4 Tbps Yuletide pummeling Cloudflare says DDoS crews ended 2025 by pushing traffic floods to new extremes, while Britain made an unwelcome leap of 36 places to become the world's sixth-most targeted location.…
DDoSer of 'strategically important' websites admitted to most charges Polish authorities have cuffed a 20-year-old man on suspicion of carrying out DDoS attacks.…
Long after CVEs issued and open source flaws fixed Last fall, Jakub Ciolek reported two denial-of-service bugs in Argo CD, a popular Kubernetes controller, via HackerOne's Internet Bug Bounty (IBB) program. Both were assigned CVEs and have since been fixed. But instead of receiving an $8,500 reward for the two flaws, Ciolek says, HackerOne ghosted him for months.…
Exploit hasn't been picked up by any malware detection engines, CEO tells The Reg A Microsoft zero-day vulnerability that allows an unprivileged user to crash the Windows Remote Access Connection Manager (RasMan) service now has a free, unofficial patch - with no word as to when Redmond plans to release an official one - along with a working exploit circulating online.…
And the earlier React2Shell patch is vulnerable If you're running React Server Components, you just can't catch a break. In addition to already-reported flaws, newly discovered bugs allow attackers to hang vulnerable servers and potentially leak Server Function source code, so anyone using RSC or frameworks that support it should patch quickly.…
PLUS: New kind of DDOS from the Americas; Predator still hunting spyware targets; NIST issues IoT advice; And more! Infosec in Brief The Apache Foundation last week warned of a 10.0-rated flaw in its Tika toolkit.…
Cloudflare data shows 29.7 Tbps record-breaker landed amid 87% surge in network-layer attacks The internet has spent the past three months ducking for cover as the Aisuru botnet hurled record-shattering DDoS barrages from an army of up to 4 million infected machines.…
Using AI to attack AI Malefactors are actively attacking internet-facing Ray clusters and abusing the open source AI framework to spread a self-replicating botnet that mines for cryptocurrency, steals data, and launches distributed denial of service (DDoS) attacks.…
Aisuru botnet strikes again, bigger and badder Azure was hit by the "largest-ever" cloud-based distributed denial of service (DDoS) attack, originating from the Aisuru botnet and measuring 15.72 terabits per second (Tbps), according to Microsoft.…
Edge, Atlas, Brave among those affected Exclusive A critical, currently unpatched bug in Chromium's Blink rendering engine can be abused to crash many Chromium-based browsers within seconds, causing a denial-of-service condition – and, in some tests, freezing the host system.…
FastNetMon says 1.5 Gpps deluge from hijacked routers, IoT kit nearly drowned scrubbing shop A DDoS mitigation provider was given a taste of the poison it tries to prevent, after being smacked by one of the largest packet-rate attacks ever recorded – a 1.5 billion packets per second (1.5 Gpps) flood that briefly threatened to knock it off the internet.…
Don't worry, there's a twist at the end Opinion Agatha Christie stuck a dagger in the notion that crime doesn't pay. With sales of between two and four billion books – fittingly, the exact number is a mystery – she built a career out of murder that out-bloodied Jack the Ripper. It's a fair bet that had she chosen to write about accountancy fraud instead, her sales would be between two and four billion fewer. Some crime is sexy. Some is not.…