The module Jms Theme Layout (jmsthemelayout) 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-2023-29629
  • Published at: 2023-03-13
  • Advisory source: Friends-Of-Presta
  • Platform: PrestaShop
  • Product: jmsthemelayout
  • Impacted release: at least 2.5.5
  • Product author: Joommasters
  • Weakness: CWE-89
  • Severity: critical (9.8)

Description

ajax_jmsvermegamenu.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_jmsthemelayout.php.php
+++ b/ajax_jmsthemelayout.php.php
@@ -102,2 +102,2 @@ function getPosts
-        $query = 'UPDATE `'._DB_PREFIX_.'jmsadv_position` SET `col_lg` = '.$pos_obj[1].', `col_md` = '.$pos_obj[2].', `col_sm` = '.$pos_obj[3].', `col_xs` = '.$pos_obj[4].
-		'	WHERE `id_position` = '.$pos_obj[0];
+        $query = 'UPDATE `'._DB_PREFIX_.'jmsadv_position` SET `col_lg` = '. (int)$pos_obj[1].', `col_md` = '. (int)$pos_obj[2].', `col_sm` = '. (int)$pos_obj[3].', `col_xs` = '. (int)$pos_obj[4].
+		'	WHERE `id_position` = '. (int)$pos_obj[0];

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.