Blog

Adobe Releases May’s Security Updates Threat Alert

May 26, 2020 | Mina Hao

Overview On May 12, 2020, local time, Adobe officially released July’s security updates to fix multiple vulnerabilities in its various products, including Adobe DNG Software Development Kit (SDK) and Adobe Acrobat and Reader. For details about the security update, visit the following link:

Java Deserialization Exploits: Registry Whitelist Bypass

May 25, 2020 | Mina Hao

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 […]

635Gbps DDoS attack spike During Covid-19 Pandemic

May 22, 2020 | Mina Hao

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 […]

SecureCRT Memory Corruption Vulnerability (CVE-2020-12651) Threat Alert

May 22, 2020 | Mina Hao

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.

IP Reputation Report-05172020

May 21, 2020 | Mina Hao

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 […]

DDoS Attack Landscape 8

May 20, 2020 | Mina Hao

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.

WebLogic Remote Code Execution Vulnerabilities (CVE-2020-2883 and CVE-2020-2884) Protection Solution

May 19, 2020 | Mina Hao

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 […]

NetWire Controllers Are Dropping COVID-19-Themed Decoy Files

May 18, 2020 | Mina Hao

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 […]

Firmware Analysis: Extraction of ASP Files in the GoAhead Architecture

May 15, 2020 | Mina Hao

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 […]

IP Reputation Report-05102020

May 14, 2020 | Mina Hao

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 […]