UPDATE 14/12/2021
I had an update from my very good friend and excellent consultant Stella Varvarigou in which she explained me that setting com.sun.jndi.rmi.object.trustURLCodebase and com.sun.jndi.cosnaming.object.trustURLCodebase to false does not fully mitigate the threat as it is possible to send the exploit code with the request. [2]
Introduction
Apache Log4j, the most popular logging system, has announced a zero-day exploit CVE-2021-44228 on December 9, 2021 that results in remote code execution. Let’s analyze whys this happened and what can be done in order to mitigate the risk. Continue reading “[UPDATE] Log4j RCE 0-day vulnerability (CVE-2021-44228) mitigation actions”