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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.
Cloudflare has disclosed that it mitigated a record-breaking distributed denial-of-service (DDoS) attack that peaked at 3.8 terabits per second (Tbps) and lasted 65 seconds
A recently disclosed vulnerability in the Common Unix Printing System (CUPS) open-source printing system can be exploited by threat actors to launch distributed denial-of-service (DDoS) attacks with a 600x amplification factor. [...]
Several of the flaws enable remote code execution and denial-of-service attacks while others enable data theft, session hijacking, and other malicious activity.
During a distributed denial-of-service campaign targeting organizations in the financial services, internet, and telecommunications sectors, volumetric attacks peaked at 3.8 terabits per second, the largest publicly recorded to date. The assault consisted of a "month-long" barrage of more than 100 hyper-volumetric DDoS attacks flood. [...]
With 14 serious security flaws found, what a gift for spies and crooks Fourteen bugs in DrayTek routers — including one critical remote-code-execution flaw that received a perfect 10 out of 10 CVSS severity rating — could be abused by crooks looking to seize control of the equipment to then steal sensitive data, deploy ransomware, and launch denial-of-service attacks.…
All an attacker needs to exploit flaws in the Common Unix Printing System is a few seconds and less than 1 cent in computing costs.
Hacktivism-related DDoS attacks have risen 70% in the region, most often targeting the public sector, while stolen data and access offers dominate the Dark Web.