Rapid7 Vulnerability & Exploit Database

Cisco VPN Concentrator 3000 FTP Unauthorized Administrative Access

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Cisco VPN Concentrator 3000 FTP Unauthorized Administrative Access



This module tests for a logic vulnerability in the Cisco VPN Concentrator 3000 series. It is possible to execute some FTP statements without authentication (CWD, RNFR, MKD, RMD, SIZE, CDUP). It also appears to have some memory leak bugs when working with CWD commands. This module simply creates an arbitrary directory, verifies that the directory has been created, then deletes it and verifies deletion to confirm the bug.


  • aushack <patrick@osisecurity.com.au>


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/networking/cisco_vpn_3000_ftp_bypass
msf auxiliary(cisco_vpn_3000_ftp_bypass) > show actions
msf auxiliary(cisco_vpn_3000_ftp_bypass) > set ACTION < action-name >
msf auxiliary(cisco_vpn_3000_ftp_bypass) > show options
    ...show and set options...
msf auxiliary(cisco_vpn_3000_ftp_bypass) > 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