SMTP Banner Grabber - Metasploit
This page contains detailed information about how to use the auxiliary/scanner/smtp/smtp_version metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: SMTP Banner Grabber
Module: auxiliary/scanner/smtp/smtp_version
Source code: modules/auxiliary/scanner/smtp/smtp_version.rb
Disclosure date: -
Last modification time: 2017-07-24 06:26:21 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: smtp, smtps
Target network port(s): 25, 465, 587, 2525, 25000, 25025
List of CVEs: -
SMTP Banner Grabber
Module Ranking and Traits
Module Ranking:
- normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.
Basic Usage
This module is a scanner module, and is capable of testing against multiple hosts.
msf > use auxiliary/scanner/smtp/smtp_version
msf auxiliary(smtp_version) > show options
... show and set options ...
msf auxiliary(smtp_version) > set RHOSTS ip-range
msf auxiliary(smtp_version) > exploit
Other examples of setting the RHOSTS option:
Example 1:
msf auxiliary(smtp_version) > set RHOSTS 192.168.1.3-192.168.1.200
Example 2:
msf auxiliary(smtp_version) > set RHOSTS 192.168.1.1/24
Example 3:
msf auxiliary(smtp_version) > set RHOSTS file:/tmp/ip_list.txt
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Description
This module grabs the banner from an SMTP server.
Vulnerable Application
Postfix on Kali Linux:
This is mainly based on the instructions from digitalocean.com. In this case, we don't need to configure all the users and set up the server fully, just enough to display a banner.
apt-get install postfix
- Select
Internet Site
- Select OK, the default is fine
- Select
systemctl restart postfix
Verification Steps
- Do:
use auxiliary/scanner/smtp/smtp_version
- Do:
set rhosts [ips]
- Do:
run
Scenarios
Postfix 3.3.0-1+b1 (Ubuntu package number) on Kali (using above config)
msf5 > use auxiliary/scanner/smtp/smtp_version
msf5 auxiliary(scanner/smtp/smtp_version) > set rhosts 10.168.202.216
rhosts => 10.168.202.216
msf5 auxiliary(scanner/smtp/smtp_version) > run
[+] 10.168.202.216:25 - 10.168.202.216:25 SMTP 220 rageKali.ragegroup ESMTP Postfix (Debian/GNU)\x0d\x0a
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Msfconsole Usage
Here is how the scanner/smtp/smtp_version auxiliary module looks in the msfconsole:
msf6 > use auxiliary/scanner/smtp/smtp_version
msf6 auxiliary(scanner/smtp/smtp_version) > show info
Name: SMTP Banner Grabber
Module: auxiliary/scanner/smtp/smtp_version
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
CG <[email protected]>
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 25 yes The target port (TCP)
THREADS 1 yes The number of concurrent threads (max one per host)
Description:
SMTP Banner Grabber
References:
http://www.ietf.org/rfc/rfc2821.txt
Module Options
This is a complete list of options available in the scanner/smtp/smtp_version auxiliary module:
msf6 auxiliary(scanner/smtp/smtp_version) > show options
Module options (auxiliary/scanner/smtp/smtp_version):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 25 yes The target port (TCP)
THREADS 1 yes The number of concurrent threads (max one per host)
Advanced Options
Here is a complete list of advanced options supported by the scanner/smtp/smtp_version auxiliary module:
msf6 auxiliary(scanner/smtp/smtp_version) > show advanced
Module advanced options (auxiliary/scanner/smtp/smtp_version):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
ShowProgress true yes Display progress messages during a scan
ShowProgressPercent 10 yes The interval in percent that progress should be shown
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Auxiliary Actions
This is a list of all auxiliary actions that the scanner/smtp/smtp_version module can do:
msf6 auxiliary(scanner/smtp/smtp_version) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the scanner/smtp/smtp_version auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(scanner/smtp/smtp_version) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
TCP::max_send_size 0 no Maxiumum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Related Pull Requests
- #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #2525 Merged Pull Request: Change module boilerplate
- #1228 Merged Pull Request: MSFTIDY cleanup #1 - auxiliary
References
See Also
Check also the following modules related to this module:
- auxiliary/client/smtp/emailer
- auxiliary/dos/smtp/sendmail_prescan
- auxiliary/dos/windows/smtp/ms06_019_exchange
- auxiliary/fuzzers/smtp/smtp_fuzzer
- auxiliary/scanner/http/wp_easy_wp_smtp
- auxiliary/scanner/smtp/smtp_enum
- auxiliary/scanner/smtp/smtp_ntlm_domain
- auxiliary/server/capture/smtp
- exploit/linux/smtp/apache_james_exec
- exploit/linux/smtp/exim4_dovecot_exec
- exploit/linux/smtp/exim_gethostbyname_bof
- exploit/linux/smtp/haraka
- exploit/unix/local/opensmtpd_oob_read_lpe
- exploit/unix/smtp/clamav_milter_blackhole
- exploit/unix/smtp/exim4_string_format
- exploit/unix/smtp/morris_sendmail_debug
- exploit/unix/smtp/opensmtpd_mail_from_rce
- exploit/unix/smtp/qmail_bash_env_exec
- exploit/windows/smtp/mailcarrier_smtp_ehlo
- exploit/windows/smtp/mercury_cram_md5
- exploit/windows/smtp/ms03_046_exchange2000_xexch50
- exploit/windows/smtp/njstar_smtp_bof
- exploit/windows/smtp/sysgauge_client_bof
- exploit/windows/smtp/wmailserver
- exploit/windows/smtp/ypops_overflow1
- auxiliary/scanner/sap/sap_smb_relay
- auxiliary/server/http_ntlmrelay
- exploit/windows/smb/smb_relay
- auxiliary/scanner/smtp/smtp_relay
Authors
CG
Version
This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.
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