Log4Shell – Follow This Multi-Layered Approach for Detection and Remediation | Qualys
Summary: Qualys describes Log4Shell as an easy-to-exploit vulnerability discovered in mid-December 2021 that can affect any Java application using a vulnerable version of Log4j, and notes that most enterprises were still determining whether and how widely they were impacted. Qualys recommends a prioritized, layered approach across external attack surface scanning, inventory queries, vulnerability detection, container scanning, patching, and EDR monitoring, and made its Web Application Scanner available to everyone for 30 days.
What you should know: Because most web applications connect to a backend that is likely also written in Java, one successful exploit can lead to additional exploits downstream, and security firms have already reported large-scale attacks against public-facing web applications using this vulnerability.
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