In the module “Generate barcode on invoice / delivery slip” (ecgeneratebarcode) up to version 1.2.0 from Ether Création for PrestaShop, a guest can perform SQL injection in affected versions if the module is not installed OR if a secret accessible to administrator is stolen.

Summary

  • CVE ID: CVE-2024-24310
  • Published at: 2024-02-20
  • Platform: PrestaShop
  • Product: ecgeneratebarcode
  • Impacted release: <= 1.2.0 (2.0.0 fixed the vulnerability)
  • Product author: Ether Création
  • Weakness: CWE-89
  • Severity: high (8.8)

Description

Foreword : we are forced to tag privilege LOW (need a valid order reference) on the CVSS 3.1 score which make it a high vulnerability since it will be high if the module has never been installed OR (if the ECO_TOKEN_BARCODE configuration do not exist OR is empty), but keep in mind that for the majority of installations, the gravity is reduced to CVSS 3.1 7.2/10

The script PHP ajax.php own a sensitive SQL calls that can be executed with a trivial http call and exploited to forge a SQL injection if a valid Order reference is known.

CVSS base metrics

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

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

Possible malicious usage

  • Obtain admin access
  • Steal/Remove data from the associated PrestaShop
  • Copy/paste data from sensitive tables to FRONT to expose tokens and unlock admins’s ajax scripts
  • Rewrite SMTP settings to hijack emails

Patch from 1.2.0

--- 1.2.0/modules/ecgeneratebarcode/ajax.php
+++ XXXXX/modules/ecgeneratebarcode/ajax.php
...
-if (Tools::getValue('ec_token') != Configuration::get('ECO_TOKEN_BARCODE')) {
+if (Tools::isEmpty('ec_token') || Tools::getValue('ec_token') !== Configuration::get('ECO_TOKEN_BARCODE')) {
...
-   $shop = Tools::getValue('idshop');
+   $shop = (int) Tools::getValue('idshop');

Other recommendations

  • It’s recommended to upgrade to the latest version of the module ecgeneratebarcode.
  • 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_ with a new longer, arbitrary prefix. Nevertheless, be warned that this is useless against blackhats 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 this set of rules.

Timeline

Date Action
2023-10-21 Issue discovered during a code review by TouchWeb.fr
2023-10-21 Contact PrestaShop Addons security Team to confirm version scope
2023-10-23 Contact PrestaShop Addons security Team confirm version scope
2024-02-05 Received CVE ID
2024-02-20 Publish this security advisory