Overview In 2020 H1, a total of 1419 vulnerabilities were added to the NSFOCUS Vulnerability Database (NSVD), 714 of which were high-risk vulnerabilities. Among these high-risk vulnerabilities, 184 vulnerabilities were Microsoft-related ones. High-risk vulnerabilities were mainly distributed in major products of Microsoft, Oracle, Adobe, Google, Cisco, IBM, Moxa, Apache, and...
Category: DDoS Mitigation
Analysis of Ripple20 Vulnerabilities
1. Background Recently, the JSOF research lab discovered a series of vulnerabilities on the Treck TCP/IP stack, which were dubbed Ripple20. Successful exploit of these vulnerabilities may allow remote code execution or disclosure of sensitive information. Technical details will be fully released at BlackHat USA 2020. (more…)
DHDiscover reflection attacks can magnify nearly 200 times of the attack 2
DHDiscover reflection attack analysis In this chapter, we’ll demonstrate the threat status quo of DHDiscover reflection attack after referring to log data captured by the NSFOCUS Threat Capture System[AZ1] from June 1, 2020 to August 18, 2020 at the port 37810. We analyzed the number of logs at the port...
DHDiscover reflection attacks can magnify nearly 200 times of the attack 1
1. Abstract In March 2020, Tencent published an article about a DVR being used for reflection attacks. Service port of this DVR is 37810, we named it DHDiscover service as there was DHDiscover shown in it. In the reflection attacks captured by Tencent, the scale of attack traffic exceeded 50G,...
What You Should Know about OpenVPN Reflection Attacks
Executive Summary OpenVPN is an application layer VPN implementation based on the OpenSSL library and serves over port 1194. In September 2019, OpenVPN was found to be vulnerable to UDP reflection attacks. This document analyzes threat exposure of the entire network, common attack means, and the bandwidth amplification factor (BAF)...
2020 Mid-Year DDoS Attack Landscape Report-3
From January to May 2020, except in April when the number of DDoS attacks was on a par with that a year earlier, the other months experienced a year-on-year decrease in the number. However, attack traffic in each month in the first half of 2020 increased year on year. (more…)
