log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value

A flaw was found in the Apache Log4j logging library in versions from 2.0.0 and before 2.15.0. A remote attacker who can control log messages or log message parameters, can execute arbitrary code on the server via JNDI LDAP endpoint...

log4j-core: DoS in log4j 2.x with Thread Context Map (MDC) input data contains a recursive lookup and context lookup pattern

A flaw was found in the Apache Log4j logging library 2.x. when the logging configuration uses a non-default Pattern Layout with a Context Lookup. Attackers with control over Thread Context Map MDC input data can craft malicious input data that contains a recursive lookup and can cause Denial of...

New "B1txor20" Linux Botnet Uses DNS Tunnel and Exploits Log4J Flaw

A previously undocumented backdoor has been observed targeting Linux systems with the goal of corralling the machines into a botnet and acting as a conduit for downloading and installing rootkits. Qihoo 360's Netlab security team called it B1txor20 "based on its propagation using the file name...