In 2019, An Trinh discovered two vulnerabilities, CVE-2019-9670 (XXE/SSRF) and CVE-2019-6980 (deserialization vulnerability), in Zimbra. As usual, An Trinh did not disclose any details. Luckily, Hans Martin Munch is more generous than An Trinh and has shared many interesting ideas. For example, he once advised using YouDebug to fix the CVE-2017-3241 vulnerability. ysoserial.payloads.JRMPClient is designed […]

NSFOCUS cloud scrubbing center witnessed a torrent of DDoS attack traffic, with peak volume up to 634.8 Gbps. At 5 p.m. of May 20th, 2020, NSFOCUS SOC team detected an enormous DDoS attack – three IPs of a Hong Kong customer were hit by DDoS attacks and inbound traffic kept increasing sharply. As DDoS attack […]

Overview A memory corruption vulnerability (CVE-2020-12651) was fixed in the latest version 8.7.2 of SecureCRT. When the CSI function receives a large negative number as a parameter, it may allow the remote system to destroy the memory in the terminal process, resulting in the execution of arbitrary code or the program crashes.

1. Top 10 countries in attack counts: The above diagram shows the top 10 regions with the most malicious IP addresses from the NSFOCUS IP Reputation databases at May 17, 2020. 2. Top 10 countries in attack percentage: The Belarus is in first place. The Cape Verde is in the second place. The country China […]

Participation of IoT Devices in DDoS Attacks According to our observation, there were a total of more than 1,280,000 IP addresses of abnormal IoT devices around the world, accounting for 2.1% of all global IoT devices. Of all those abnormal IoT devices, 170,000 were involved in DDoS attacks, making up 13.08% of the total.

Overview Oracle released Critical Patch Update (CPU) for April 2020 that fixes multiple vulnerabilities of different risk levels, including two critical ones (CVE-2020-2883 and CVE-2020-2884) with a CVSS score of 9.8 that allow unauthenticated attackers with network access via T3 to compromise vulnerable Oracle WebLogic Server. Successful exploitation could result in takeover of Oracle WebLogic […]

With the outbreak of the COVID-19 pandemic around the world, trending hashtags related to the epidemic are flooding social media, attracting attention of a number of international hacker organizations, which jump at the chance to conduct social engineering based on decoy messages. Recently, NSFCOUS found that NetWire controllers began to drop the trojan with the […]

GoAhead is an open-source web architecture that is widely used in embedded systems thanks to its high performance and high availability. Traditional servers built on the GoAhead architecture usually see a large number of dynamic pages written in the Active Server Pages (ASP) scripting language and functions written in C/C++ that are registered to the […]

1. Top 10 countries in attack counts: The above diagram shows the top 10 regions with the most malicious IP addresses from the NSFOCUS IP Reputation databases at May 10, 2020. 2. Top 10 countries in attack percentage: The Belarus is in first place. The Cape Verde is in the second place. The country China […]

Attack Gang Size Gang Size Figure 3-27 shows the distribution of our identified IP gangs by size. Two gangs consist of over 10,000 members and the largest gang has 88,000 members.