Overview According to NSFOCUS CERT’s monitoring, VMware’s official security advisory, disclosing multiple vulnerabilities in VMware vCenter Server on September 22. Those issues allow attackers to cause information disclosure, privilege promotion and remote code execution. Now VMware has released security updates to fix the vulnerabilities. Affected users are advised to take...
Category: Emergency Response
XStream Multiple High-Risk Vulnerabilities Threat Alert
Overview Recently, NSFOCUS found that XStream released security advisories disclosing 14 security vulnerabilities in its products. An attacker could exploit these vulnerabilities to conduct a DoS, server-side request forgery (SSRF), or remote code execution (RCE) attack. XStream is a tool to serialize Java objects to XML and back again. When...
Microsoft MSHTML Remote Code Execution Vulnerability (CVE-2021-40444) Threat Alert
Overview On September 8, Beijing time, NSFOCUS CERT found that Microsoft released a security bulletin to disclose a remote code execution vulnerability (CVE-2021-40444) in Microsoft MSHTML. Attackers could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine, and convince the...
Atlassian Confluence Remote Code Execution Vulnerability (CVE-2021-26084) Threat Alert
Overview Recently, NSFOCUS CERT found that Atlassian released a security bulletin to announce the fix of the Confluence Server Webwork OGNL Injection Vulnerability (CVE-2021-26084). This vulnerability allows an authenticated attacker, and in some instances, an unauthenticated user, to execute arbitrary code on Confluence Server or Data Center by injecting a...
Insights into Ransomware Spread Using Exchange 1-Day Vulnerabilities 2-2
Analysis of the Kill Chain of the LockFile Ransomware Group KDU Tool Terminating Multiple Antivirus Processes The attacker renames the KDU tool (open-source Windows driver loader implementing DSG bypass via an exploit) autologin, copies the related program to the temporary directory, and loads and executes the designated driver file to...
Insights into Ransomware Spread Using Exchange 1-Day Vulnerabilities 1-2
Event Overview Recently, NSFOCUS CERT discovered a slew of security incidents that exploited security vulnerabilities (ProxyShell) in Microsoft Exchange. Also, NSFOCUS found that the new LockFile ransomware group LockFile took advantage of these ProxyShell and PetitPotam vulnerabilities to target enterprise domain environments, finally encrypting quite a few hosts from enterprises...
