Stellar Cyber: Log4j Vulnerability and Exploitation Detection

1. Introduction

In the past several days, a serious Log4j vulnerability (CVE-2021-44228, CVE-2021-45046) has nearly led to a perfect storm in the Internet world. As a widely used Java logging utility with an easily exploitable vulnerability, Log4j has no doubt made IT professionals and companies nervous and many questions have been raised – What is this vulnerability? How can I know if our system is vulnerable? Has my IT infrastructure already been breached? What can I do …

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