Log4j: How to protect yourself from this security vulnerability

The Log4Shell security vulnerability in Apache’s Log4J utility threatens millions of applications, making unpatched systems targets for cybercriminals to compromise and control. Attackers can gain control of a server to install malware, steal information or mine digital currency. The flaw is simple to exploit and difficult to patch. While no breaches have been officially reported so far, experts urge companies to act quickly to secure their systems.