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A recently discovered HTTP/2 protocol-based Distributed-Denial-of-Service (DDoS) vulnerability has been identified by multiple cloud service providers. This vulnerability enables attackers to achieve an unprecedented record of 398 million requests per second. This vulnerability has been identified as CVE-2023-44487, potentially making it one of the largest layer 7 DDoS attacks ever recorded. What is HTTP/2 Rapid […]

NSFOCUS CTEM Offerings: A Comprehensive Solution to Enhance Your Security Posture Singapore – October 17, 2023 – NSFOCUS, a globally recognized leader in cybersecurity solutions, is pleased to announce a comprehensive suite of security offerings designed to enhance the Continuous Threat Exposure Management (CTEM) program for organizations of all sizes. CTEM is a 5-step process […]

Overview NSFOCUS Security Labs has been continuously monitoring the newly discovered WinRAR 0-day vulnerability, CVE-2023-38831. It has come to our attention that the advanced persistent threat group known as DarkPink has recently begun exploiting this vulnerability to target government entities in Vietnam and Malaysia. In this round of attack activities, DarkPink attackers have incorporated the […]

The stage is set, and the countdown has begun. GovWare 2023, a pivotal event in cybersecurity, is just around the corner. From a thorough review of the event agenda, we discerned that many speeches, keynotes and panels will be centered around the application of Artificial Intelligence (AI) in cybersecurity. As we eagerly await GovWare 2023, […]

Overview On October 11, NSFOCUS CERT monitored that Microsoft had released a security update patch for October, fixing 104 security problems, involving Microsoft WordPad, Skype for Business, Windows Layer 2 Tunneling Protocol, Microsoft Message Queuing and other widely used products, including high-risk vulnerability types such as privilege enhancement, remote code execution, etc. Among the vulnerabilities […]

Overview Recently, NSFOCUS monitored curl’s official security announcement, which fixed the SOCKS5 heap buffer overflow vulnerability (CVE-2023-38545) and cookie injection vulnerability (CVE-2023-38546). The details of the vulnerability have been made public. Affected users should upgrade curl as soon as possible. SOCKS5 Heap Buffer Overflow Vulnerability (CVS 2023-38545) When curl is required to pass the host […]

Overview Recently, NSFOCUS CERT detected an Exim remote code execution vulnerability (CVE-2023-42115). When external authentication is enabled, due to improper user input verification, an unauthenticated attacker can remotely exploit this vulnerability by writing data beyond the bounds, ultimately executing arbitrary code on the target server. At present, the details of the vulnerability have been disclosed. […]

The CNVD (China National Vulnerability Database) platform recently initiated the 2022 annual technical group support unit’s capability assessment. A comprehensive assessment was conducted across six capability domains, including vulnerability collection, vulnerability discovery, big data analysis of vulnerability threat risks, vulnerability technical analysis, major vulnerability incident response, and collaborative teamwork. NSFOCUS was awarded the Outstanding Contribution […]

I. Abstract In September 2023, NSFOCUS global threat hunting system monitored several new botnet variant families developed based on Mirai, among which hailBot, kiraiBot and catDDoS are the most active, are accelerating their spread, and are widely deployed, which has constituted a considerable threat. Through this article, we will disclose the technical details of these […]

Overview Recently, NSFOCUS CERT found that Google officially fixed a zero-day exploit (CVE-2023-5217), which was caused by the heap buffer overflow in the VP8 encoding of the open source libvpx video codec library. An attacker could use this vulnerability to execute arbitrary code on the target system. At present, this vulnerability has been exploited in […]