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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 […]

Overview Recently, NSFOCUS CERT monitored that JumpServer officially issued a notice to fix multiple security vulnerabilities. The vulnerabilities are detailed below. JumpServer Reset Password Vulnerability (CVS 2023-42820): There is a password reset vulnerability in JumpServer, as third-party libraries expose random seed numbers to APIs, which may cause random verification codes to be replayed. Unauthenticated remote […]

Overview Recently, NSFOCUS CERT found that Google officially fixed a heap buffer overflow vulnerability (CVE-2023-4863). Due to a flaw in the WebP module, an attacker triggered the vulnerability by inducing users to visit a malicious website, which ultimately led to arbitrary code execution on the target system. At present, it has been detected that the […]

I. Abstract NSFOCUS Security Labs recently discovered a new attack process based on phishing documents in their daily threat-hunting operations. Delving deeper into this finding through extensive research, they confirmed two new Trojan horse programs and many rare attack techniques and tactics. NSFOCUS Security Labs believes that this new attack process comes from a new […]

Overview Recently, NSFOCUS CERT has detected that Apple has officially fixed three zero-day exploit in multiple products. These vulnerabilities exist in the wild. Affected users should take protective measures as soon as possible. The details of the vulnerability are as follows: Apple WebKit Arbitrary Code Execution Vulnerability (CVS 2023-41993): There is an arbitrary code execution […]

Overview Recently, NSFOCUS CERT monitored that GitLab officially issued a security notice, and fixed an unauthorized call vulnerability in GitLab Enterprise Edition (EE). The vulnerability is a bypass of CVE-2023-3932. An attacker with low privileges can abuse the scan execution policy to run pipelines without the user’s consent. Successful exploitation of this vulnerability may allow […]

Overview Recently, NSFOCUS CERT monitored Adobe’s official security announcement and fixed an arbitrary code execution vulnerability (CVE-2023-26369). Due to a cross-border write flaw, an unauthenticated attacker could finally execute arbitrary code on the target system by exploiting this vulnerability. This vulnerability is being exploited in the wild. Affected users should take protective measures as soon […]