The module Jms MegaMenu (jmsmegamenu) from Joommasters contains a Blind SQL injection vulnerability. This module is for the PrestaShop e-commerce platform and mainly provided with joo masters PrestaShop themes

Summary

  • CVE ID: CVE-2023-29630
  • Published at: 2023-03-13
  • Advisory source: Friends-Of-Presta
  • Platform: PrestaShop
  • Product: jmsmegamenu
  • Impacted release: at least 1.1.x and 2.0.x
  • Product author: Joommasters
  • Weakness: CWE-89
  • Severity: critical (9.8)

Description

ajax_jmsmegamenu.php hold sensitives SQL calls that can be executed with a trivial http call and exploited to forge a blind SQL injection.

WARNING : This exploit is actively used to deploy webskimmer to massively stole credit cards.

CVSS base metrics

  • Attack vector: network
  • Attack complexity: low
  • Privilege required: none
  • User interaction: none
  • Scope: unchanged
  • Confidentiality: high
  • Integrity: high
  • Availability: high

Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Possible malicious usage

  • Technical and personal data leaks
  • Obtain admin access
  • Remove all data of the linked PrestaShop
  • Display sensitives tables to front-office to unlock potential admin’s ajax scripts of modules protected by token on the ecosystem

Patch

--- a/ajax_jmsmegamenu.php
+++ b/ajax_jmsmegamenu.php
@@ -29,1 +29,1 @@ function getPosts
-        UPDATE `'._DB_PREFIX_.'jmsmegamenu` SET `params` = \''.Tools::getValue('params').'\'
+        UPDATE `'._DB_PREFIX_.'jmsmegamenu` SET `params` = \''.pSQL(Tools::getValue('params')).'\'

Timeline

Date Action
2022-09-01 Issue discovered during a pentest
2023-02-17 Contact the author
2023-03-13 Publish this security advisory

Other recommandations

  • Upgrade PrestaShop to the latest version to disable multiquery executions (separated by “;”)
  • Change the default database prefix ps_ by a new longer arbitrary prefix. Nethertheless, be warned that this is useless against blackhat with DBA senior skill because of a design vulnerability in DBMS
  • Activate OWASP 942’s rules on your WAF (Web application firewall), be warned that you will probably break your backoffice and you will need to pre-configure some bypasses against these set of rules.