SMTP User Enumeration Utility
The SMTP service has two internal commands that allow the enumeration of users: VRFY (confirming the names of valid users) and EXPN (which reveals the actual address of users aliases and lists of e-mail (mailing lists)). Through the implementation of these SMTP commands can reveal a list of valid users.
Rank
- Normal
Authors
- ==[ Alligator Security Team ]== < >
- Heyder Andrade < heyder [at] alligatorteam.org >
Vulnerability References
Development
Similar Modules
Usage Information
$ msfconsole
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msf > use auxiliary/scanner/smtp/smtp_enum
msf auxiliary(smtp_enum) > set RHOSTS [TARGET HOST RANGE]
msf auxiliary(smtp_enum) > run
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msf > use auxiliary/scanner/smtp/smtp_enum
msf auxiliary(smtp_enum) > set RHOSTS [TARGET HOST RANGE]
msf auxiliary(smtp_enum) > run
Module Options
| RHOSTS | The target address range or CIDR identifier |
| RPORT | The target port (default: 25) |
| THREADS | The number of concurrent threads (default: 1) |
| USER_FILE | The file that contains a list of probable users accounts. (default: /home/svn/jobs/msf3/data/wordlists/unix_users.txt) |
| CHOST | The local client address |
| CPORT | The local client port |
| ConnectTimeout | Maximum number of seconds to establish a TCP connection |
| Proxies | Use a proxy chain |
| SSL | Negotiate SSL for outgoing connections |
| SSLVersion | Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) |
| ShowProgress | Display progress messages during a scan |
| ShowProgressPercent | The interval in percent that progress should be shown |
| VERBOSE | Enable detailed status messages |
| WORKSPACE | Specify the workspace for this module |
| TCP::max_send_size | Maxiumum tcp segment size. (0 = disable) |
| TCP::send_delay | Delays inserted before every send. (0 = disable) |