Log4Shell is a serious Remote Code Execution vulnerability in the Apache Log4j framework that allows attackers to execute arbitrary code via malicious JNDI lookup strings. Discovered in 2021, the flaw affects versions 2.0-beta9 to 2.14.1 of Log4j, impacting countless Java applications that use this logging tool. Affected: Apache Log4j, Java applications
Keypoints :
- Log4Shell is a critical vulnerability allowing remote code execution in Apache Log4j.
- This vulnerability went unnoticed for nearly eight years before being disclosed in 2021.
- Attackers can exploit the vulnerability by injecting JNDI lookup strings into log entries.
- Malicious servers can respond to JNDI lookups with harmful Java classes, leading to code execution on the host server.
- Detection and mitigation of Log4Shell vulnerabilities are crucial for security.