Cybersecurity Briefing — Apache Log4Shell (CVE-2021-44228) critical RCE disclosed
On 9 December 2021 a critical remote code execution flaw in Apache Log4j (CVE-2021-44228) was disclosed, prompting urgent patching, exploit detections, and guidance from vendors and governments.
Researchers reported CVE-2021-44228 on 9 December 2021, revealing the Log4Shell JNDI lookup vulnerability enabling unauthenticated remote code execution in Log4j 2.x. Apache issued 2.15.0 mitigation guidance, while CISA published an emergency alert and required federal agencies to patch.
Security teams should inventory Java applications, deploy vendor patches or configuration mitigations, monitor for exploitation signatures, and harden egress controls to block malicious JNDI callbacks.
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