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Cerberus FTP Server SFTP Username Enumeration

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Cerberus FTP Server SFTP Username Enumeration

Disclosed
05/27/2014
Created
05/30/2018

Description

This module uses a dictionary to brute force valid usernames from Cerberus FTP server via SFTP. This issue affects all versions of the software older than 6.0.9.0 or 7.0.0.2 and is caused by a discrepancy in the way the SSH service handles failed logins for valid and invalid users. This issue was discovered by Steve Embling.

Author(s)

  • Steve Embling
  • Matt Byrne <attackdebris@gmail.com>

Development

References

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/scanner/ssh/cerberus_sftp_enumusers
msf auxiliary(cerberus_sftp_enumusers) > show actions
    ...actions...
msf auxiliary(cerberus_sftp_enumusers) > set ACTION < action-name >
msf auxiliary(cerberus_sftp_enumusers) > show options
    ...show and set options...
msf auxiliary(cerberus_sftp_enumusers) > 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

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