CVE_2021_44228_Check

A little widget to check if your JRE/JDK allows JNDI remote code execution by default

Compiling

git clone https://github.com/trickyearlobe/CVE_2021_44228_Check
cd CVE_2021_44228_Check
javac Log4JCheck.java

Running

java Log4JCheck

It should produce results similar to this

Java Version: 11.0.12
com.sun.jndi.ldap.object.trustURLCodebase: null
com.sun.jndi.rmi.object.trustURLCodebase: null
com.sun.jndi.cosnaming.object.trustURLCodebase: null

A null or false means remote JNDI code execution is disabled by default. A true means remote JNDI code execution is enabled.