Overview  Microsoft released October 2020 security updates on Tuesday which fix 87 vulnerabilities ranging from simple spoofing attacks to remote code execution in various products, including .NET Framework, Azure, Group Policy, Microsoft Dynamics, Microsoft Exchange Server, Microsoft Graphics Component, Microsoft NTFS, Microsoft Office, Microsoft Office SharePoint, Microsoft Windows, Microsoft Windows Codecs Library, PowerShellGet, Visual Studio, […]

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.

Conclusion Botnets have evolved to use weak passwords, exploits, and phishing emails as major propagation and intrusion means. Dormant attackers that are seeking opportunities to do wrong tend to exploit vulnerabilities during the time between vulnerability disclosure and remediation. Botnet hackers often exploit newly revealed vulnerabilities to infect new targets to enlarge their attack surface […]

Overview On October 13, 2020 (local time), Adobe released security updates which address a vulnerability in Adobe Flash Player. For details about the security bulletins and advisories, visit the following link:

Overview Recently, NSFOCUS detected that Yii Framework 2 disclosed a deserialization remote command execution vulnerability (CVE-2020-15148) in its update log published on September 14, 2020. By adding the _wakeup() function to Class yii\db\BatchQueryResult, Yii Framework 2 disables yii\db\BatchQueryResult deserialization and prevents remote command execution caused by application calling ‘unserialize()’ on arbitrary user input. Yii2 is […]

Vulnerability Description Recently, NSFOCUS detected a privilege escalation vulnerability in the Linux kernel (CVE-2020-14386). An integer overflow exists in the way net/packet/af_packet.c processes AF_PACKET, which leads to out-of-bounds write, thereby escalating privileges. An attacker could exploit this vulnerability to gain system root privileges from unprivileged processes. This vulnerability may affect virtualized products using the Linux […]

Five Major APT Groups In 2019, NSFOCUS Security Labs tracked and delved into five major APT groups: BITTER, OceanLotus, MuddyWater, APT34, and FIN7. The following sections illustrate the latest developments of these APT groups by explaining how they optimize attack chains, refine attack methods, and sharpen RAT tools. BITTER BITTER is an attack group with […]

Honeypot-captured Threats in 2020 H1 In terms of honeypot-captured threats, in 2020 H1, Internet attack activities mainly consisted of malicious scanning, over 50% of which were attacks on or scanning of port 443. As for exploits, most attacks were directed at Power cameras, Dlink routers, and JBoss servers. Weak password attacks were mainly launched from […]

Overview In the distributed denial-of-service (DDoS) botnet activities in 2020 H1, most were from Mirai, Gafgyt, and other major families. In 2020 H1, DDoS attack means were dominated by UDP floods, CC, and TCP floods. In 2020 H1, Hostwinds, Digital Ocean, and OVH were the major hosted cloud service providers of C&C servers. We predict […]

Vulnerability Description Recently, IBM released a security bulletin to announce the fix of an XML external entity injection (XXE) vulnerability (CVE-2020-4643) on WebSphere Application Server (WAS). Since WAS fails to properly process XML data, a remote attacker could exploit this vulnerability to obtain sensitive information on the server. The NSFOCUS security research team reported CVE-2020-4643 […]