7 Gbps TCP-Middlebox-Reflection Incident Mitigated by NSFOCUS

April 29, 2022

In mid-April, NSFOCUS discovered that one of its Cloud DDoS Protection Service customer in APAC region has encountered a TCP-middlebox-reflection attack which became popular throughout the world during past months after its first discourse in Aug, 2021. The attack reached its peak at 7Gbps and lasted for several hours, after immediate reaction by NSFOCUS Managed […]

Principles and Characteristics of TCP Reflection Attacks

April 28, 2021

Produced by: Siqi GUO, Qiwen LUO Increasingly Serious Reflection Attacks Reflection attacks, as nothing new, have become one of the most troublesome and common DDoS attacks and are dominant in bandwidth consumption DDoS attacks. According to NSFOCUS’s latest 2020 DDoS Attack Landscape, reflection attacks made up 34% of all DDoS attacks in 2020. Compared with […]

Windows TCP/IP Remote Code Execution Vulnerability (CVE-2021-24074)

February 24, 2021

Vulnerability Description On February 10, NSFOCUS found that Microsoft fixed the Windows TCP/IP remote code execution vulnerability (CVE-2021-24074) in its February updates. This vulnerability exists in the IPv4 source routing which is blocked by default in Windows systems. Attackers, via a crafted IP packet, could exploit this vulnerability to execute arbitrary code on a target […]


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