In the module “Attributes table” (aitable) for PrestaShop, an attacker can perform a SQL injection up to 0.2.1. Release 0.2.2 fixed this security issue.

Summary

  • CVE ID: CVE-2023-33665
  • Published at: 2023-08-01
  • Advisory source: Friends-Of-Presta.org
  • Platform: PrestaShop
  • Product: aitable
  • Impacted release: <= 0.2.1 (0.2.2 fixed issue)
  • Product author: ai-dev
  • Weakness: CWE-89
  • Severity: critical (9.8)

Description

Up to 0.2.2, a sensitive SQL call in file includes/ajax.php can be executed with a trivial http call and exploited to forge a blind SQL injection throught the POST or GET submitted attributes variables.

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/modules/aitable/includes/ajax.php
+++ b/modules/aitable/includes/ajax.php
        $data = array();
        foreach ($lines as $line) {
            foreach ($columns as $col) {
                $result = Db::getInstance()->getRow(
                    'SELECT COUNT(pac.id_product_attribute) AS count, pa.* FROM '._DB_PREFIX_.'product_attribute AS pa LEFT JOIN '._DB_PREFIX_.'product_attribute_combination AS pac ON pac.id_product_attribute = pa.id_product_attribute WHERE '.
-                    'pac.id_attribute IN ('.pSql($attributes).','.(int)$line['id_attribute'].','.(int)$col['id_attribute'].') AND pa.id_product = '.(int)$product_id.' GROUP BY pa.id_product_attribute HAVING count = '.(int)$count
+                    'pac.id_attribute IN ('.implode(',', array_map('intval', explode(',', $attributes))).','.(int)$line['id_attribute'].','.(int)$col['id_attribute'].') AND pa.id_product = '.(int)$product_id.' GROUP BY pa.id_product_attribute HAVING count = '.(int)$count
                );

Other recommandations

    • To help improve the security of your PrestaShop installation, we recommend upgrading to the latest version. One of the benefits of upgrading is that it will disable the use of multiquery executions (separated by semicolons). However, please be aware that this will not protect your shop against SQL injection attacks that use the UNION clause to steal data. Additionally, it’s important to note that PrestaShop includes a function called pSQL, which includes a strip_tags function. This helps protect your shop against Stored XSS (also known as XSS T2) of Category 1. If a pSQL function is missing, it could potentially expose your project to critical Stored XSS vulnerabilities due to edge cases. Therefore, it’s crucial to ensure that all relevant functions are properly implemented and used consistently throughout your project.
  • Change the default database prefix ps_ by a new longer arbitrary prefix. Nevertheless, be warned that this is useless against blackhats with DBA senior skills 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.

Timeline

Date Action
2023-05-08 Vunlnerability found during a audit by 202 ecommerce
2023-05-10 Contact the author
2023-05-12 The author confirm the issue and supply a fixed release
2023-05-12 Request a CVE ID
2023-08-01 Publication of this advisory