Overview On October 13, 2020 (local time), Microsoft fixed a critical vulnerability dubbed Bad Neighbor (CVE-2020-16898) in the Windows TCP/IP stack in its latest monthly patch update. An attacker might execute arbitrary code on a remote system by sending maliciously crafted ICMPv6 Router Advertisement packets. McAfee said the proof-of-concept code shared with MAPP (Microsoft Active […]

Overview On October 20, 2020, local time, Oracle released Critical Patch Update (CPU) for October 2020, its own security advisories, and third-party security bulletins, which fix 402 vulnerabilities of varying severity levels. For details about affected products and available patches, see the appendix. For complete information, see Oracle’s official security advisory from the following link:

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 other vendors.

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 […]