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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.

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Module Name



  • aushack <patrick [at]>




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/vpn_3000_ftp_bypass msf auxiliary(vpn_3000_ftp_bypass) > show actions ...actions... msf auxiliary(vpn_3000_ftp_bypass) > set ACTION <action-name> msf auxiliary(vpn_3000_ftp_bypass) > show options and set options... msf auxiliary(vpn_3000_ftp_bypass) > run