CVE-2023-44024: [CVE-2023-44024] Improper neutralization of SQL parameters in KnowBand - One Page Checkout, Social Login & Mailchimp module for PrestaShop

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In the module “Module One Page Checkout, Social Login & Mailchimp” (supercheckout) up to version 8.0.3 from KnowBand for PrestaShop, an anonymous user can perform a SQL injection.

Summary

• CVE ID: CVE-2023-44024
• Published at: 2023-10-05
• Platform: PrestaShop
• Product: supercheckout
• Impacted release: <= 8.0.3 (8.0.4 fixed the vulnerability)
• Product author: KnowBand
• Weakness: CWE-89
• Severity: critical (9.8)

Description

The method SupercheckoutSupercheckoutModuleFrontController::updateCheckoutBehaviour() has sensitive SQL calls that can be executed with a trivial http call and exploited to forge a SQL injection.

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

This exploit uses a PrestaShop front controller and most attackers can conceal the module controller’s path during the exploit, so you will never know within your conventional frontend logs that it exploits this vulnerability. You will only see “POST /” inside your conventional frontend logs. Activating the AuditEngine of mod_security (or similar) is the only way to get data to confirm this exploit.

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

• Obtain admin access
• 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 8.0.3

--- 8.0.3/modules/supercheckout/controllers/front/supercheckout.php
+++ 8.0.4/modules/supercheckout/controllers/front/supercheckout.php
private static function transactionExists(string
...
        if (isset($result) && !empty($result) && $result != "") {
            //check if column exists or not
            $check_col_sql = 'SELECT count(*) FROM information_schema.COLUMNS
-                              WHERE COLUMN_NAME = "' . $field_name . '"
+                              WHERE COLUMN_NAME = "' . pSQL($field_name) . '"
                               AND TABLE_NAME = "' . _DB_PREFIX_ . 'kb_checkout_behaviour_stats"
                               AND TABLE_SCHEMA = "' . _DB_NAME_ . '"';
            $check_col = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($check_col_sql);
            if ($check_col == 1) {
-               $sql = 'UPDATE ' . _DB_PREFIX_ . 'kb_checkout_behaviour_stats SET ' . pSQL($field_name) . ' = ' . (int) $filled . ' WHERE id_cart = ' . (int) $this->context->cart->id;
+               $sql = 'UPDATE ' . _DB_PREFIX_ . 'kb_checkout_behaviour_stats SET `' . bqSQL($field_name) . '` = ' . (int) $filled . ' WHERE id_cart = ' . (int) $this->context->cart->id;
                Db::getInstance()->execute($sql);
                if ((Tools::getValue('use_for_invoice') == 'true' || Tools::getValue('use_for_invoice') == true) && $field_name != 'email' && (strpos($field_name, '_invoice') == false)) {
-                   $sql = 'UPDATE ' . _DB_PREFIX_ . 'kb_checkout_behaviour_stats SET ' . pSQL($field_name) . '_invoice = ' . (int) $filled . ' WHERE id_cart = ' . (int) $this->context->cart->id;
+                   $sql = 'UPDATE ' . _DB_PREFIX_ . 'kb_checkout_behaviour_stats SET `' . bqSQL($field_name) . '_invoice` = ' . (int) $filled . ' WHERE id_cart = ' . (int) $this->context->cart->id;
                    Db::getInstance()->execute($sql);
                }
            }

Other recommendations

• It’s recommended to upgrade to the latest version of the module supercheckout.
• Upgrade PrestaShop to the latest version to disable multiquery executions (separated by “;”) - be warned that this functionality WILL NOT protect your SHOP against injection SQL which uses the UNION clause to steal data.
• Change the default database prefix ps_ with 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 this set of rules.

Timeline

Date

Action

2023-07-24

Issue discovered during a code review by TouchWeb.fr

2023-07-24

Contact PrestaShop Addons security Team to confirm version scope

2023-07-25

PrestaShop Addons security Team to confirm version scope

2023-09-19

Author provide a patch

2023-09-22

Request a CVE ID

2023-09-28

Received CVE ID

2023-10-05

Publish this security advisory

Links

• PrestaShop addons product page
• National Vulnerability Database

DISCLAIMER: The French Association Friends Of Presta (FOP) acts as an intermediary to help hosting this advisory. While we strive to ensure the information and advice provided are accurate, FOP cannot be held liable for any consequences arising from reported vulnerabilities or any subsequent actions taken.