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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.
A variant of the Mirai botnet is targeting almost two dozen vulnerabilities aiming to take control of D-Link, Arris, Zyxel, TP-Link, Tenda, Netgear, and MediaTek devices to use them for distributed denial-of-service (DDoS) attacks. [...]
A new malware called Condi has been observed exploiting a security vulnerability in TP-Link Archer AX21 (AX1800) Wi-Fi routers to rope the devices into a distributed denial-of-service (DDoS) botnet
A new DDoS-as-a-Service botnet called "Condi" emerged in May 2023, exploiting a vulnerability in TP-Link Archer AX21 (AX1800) Wi-Fi routers to build an army of bots to conduct attacks. [...]
An unknown threat actor is brute-forcing Linux SSH servers to install a wide range of malware, including the Tsunami DDoS (distributed denial of service) bot, ShellBot, log cleaners, privilege escalation tools, and an XMRig (Monero) coin miner. [...]
Microsoft on Friday attributed a string of service outages aimed at Azure, Outlook, and OneDrive earlier this month to an uncategorized cluster it tracks under the name Storm-1359
Previous claims its own software updates were the issue remain almost, kinda, plausible In the murky world of political and corporate spin, announcing bad news on Friday afternoon – a time when few media outlets are watching, and audiences are at a low ebb – is called "taking out the trash." And that’s what Microsoft appears to have done last Friday.…
Microsoft has confirmed that recent outages to Azure, Outlook, and OneDrive web portals resulted from Layer 7 DDoS attacks against the company's services. [...]