Rapid7 Vulnerability & Exploit Database

Cisco ASA Authentication Bypass (EXTRABACON)

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Cisco ASA Authentication Bypass (EXTRABACON)



This module patches the authentication functions of a Cisco ASA to allow uncredentialed logins. Uses improved shellcode for payload.


  • Sean Dillon <sean.dillon@risksense.com>
  • Zachary Harding <zachary.harding@risksense.com>
  • Nate Caroe <nate.caroe@risksense.com>
  • Dylan Davis <dylan.davis@risksense.com>
  • William Webb <william_webb@rapid7.com>
  • Jeff Jarmoc <jjarmoc>
  • Equation Group
  • Shadow Brokers


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/admin/cisco/cisco_asa_extrabacon
msf auxiliary(cisco_asa_extrabacon) > show actions
msf auxiliary(cisco_asa_extrabacon) > set ACTION < action-name >
msf auxiliary(cisco_asa_extrabacon) > show options
    ...show and set options...
msf auxiliary(cisco_asa_extrabacon) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security