Unix Command Shell, Reverse UDP (/dev/udp) - Metasploit


This page contains detailed information about how to use the payload/cmd/unix/reverse_bash_udp metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

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Module Overview

Name: Unix Command Shell, Reverse UDP (/dev/udp)
Module: payload/cmd/unix/reverse_bash_udp
Source code: modules/payloads/singles/cmd/unix/reverse_bash_udp.rb
Disclosure date: -
Last modification time: 2021-11-12 10:46:16 +0000
Supported architecture(s): cmd
Supported platform(s): Unix
Target service / protocol: -
Target network port(s): -
List of CVEs: -

Creates an interactive shell via bash's builtin /dev/udp. This will not work on circa 2009 and older Debian-based Linux distributions (including Ubuntu) because they compile bash without the /dev/udp feature.

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

msf > use payload/cmd/unix/reverse_bash_udp
msf payload(reverse_bash_udp) > show options
    ... show and set options ...
msf payload(reverse_bash_udp) > generate

To learn how to generate payload/cmd/unix/reverse_bash_udp with msfvenom, please read this.

Required Options

  • LHOST: The listen address (an interface may be specified)

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Msfconsole Usage

Here is how the cmd/unix/reverse_bash_udp payload looks in the msfconsole:

msf6 > use payload/cmd/unix/reverse_bash_udp

msf6 payload(cmd/unix/reverse_bash_udp) > show info

       Name: Unix Command Shell, Reverse UDP (/dev/udp)
     Module: payload/cmd/unix/reverse_bash_udp
   Platform: Unix
       Arch: cmd
Needs Admin: No
 Total size: 64
       Rank: Normal

Provided by:
  hdm <[email protected]>
  bcoles <[email protected]>

Basic options:
Name   Current Setting  Required  Description
----   ---------------  --------  -----------
LHOST                   yes       The listen address (an interface may be specified)
LPORT  4444             yes       The listen port

Description:
  Creates an interactive shell via bash's builtin /dev/udp. This will 
  not work on circa 2009 and older Debian-based Linux distributions 
  (including Ubuntu) because they compile bash without the /dev/udp 
  feature.

Module Options

This is a complete list of options available in the cmd/unix/reverse_bash_udp payload:

msf6 payload(cmd/unix/reverse_bash_udp) > show options

Module options (payload/cmd/unix/reverse_bash_udp):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST                   yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port

Advanced Options

Here is a complete list of advanced options supported by the cmd/unix/reverse_bash_udp payload:

msf6 payload(cmd/unix/reverse_bash_udp) > show advanced

Module advanced options (payload/cmd/unix/reverse_bash_udp):

   Name                        Current Setting  Required  Description
   ----                        ---------------  --------  -----------
   AutoRunScript                                no        A script to run automatically on session creation.
   AutoVerifySession           true             yes       Automatically verify and drop invalid sessions
   CommandShellCleanupCommand                   no        A command to run before the session is closed
   CreateSession               true             no        Create a new session for every successful login
   InitialAutoRunScript                         no        An initial script to run on session creation (before AutoRunScript)
   ReverseListenerBindAddress                   no        The specific IP address to bind to on the local system
   ReverseListenerBindPort                      no        The port to bind to on the local system if different from LPORT
   ReverseListenerComm                          no        The specific communication channel to use for this listener
   ReverseListenerThreaded     false            yes       Handle every connection in a new thread (experimental)
   StagerRetryCount            10               no        The number of times the stager should retry if the first connect fails
   StagerRetryWait             5                no        Number of seconds to wait for the stager between reconnect attempts
   VERBOSE                     false            no        Enable detailed status messages
   WORKSPACE                                    no        Specify the workspace for this module

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See Also

Check also the following modules related to this module:

Authors

  • hdm
  • bcoles

Version

This page has been produced using Metasploit Framework version 6.1.36-dev. For more modules, visit the Metasploit Module Library.

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