CVE-2023-40920: [CVE-2023-40920] Improper neutralization of an SQL parameter in prixanconnect module for PrestaShop

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In the module “Prixan connect” (prixanconnect) for PrestaShop, an attacker can perform a blind SQL injection before 1.62 without restrictions. Release 1.62 fixed this security issue.

Summary

• CVE ID: CVE-2023-40920
• Published at: 2023-10-05
• Advisory source: Friends-Of-Presta.org
• Vendor: PrestaShop
• Product: prixanconnect
• Impacted release: <= 1.61 (1.62 fixed the issue)
• Product author: Prixan
• Weakness: CWE-89
• Severity: critical (9.8)

Description

Up to Release 1.63, multiple sensitive SQL calls in class PrixanconnectUpdateProductsModuleFrontController::importProducts() can be executed with a trivial http call and exploited to forge a blind SQL injection throught a json string posted in the body content.

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

--- a/prixanconnect/controllers/front/Products.php
+++ b/prixanconnect/controllers/front/Products.php
@@ -33,21 +33,21 @@ class PrixanconnectProductsModuleFrontCo
          LEFT JOIN `" . _DB_PREFIX_ . "product_attribute` AS pa ON pa.`id_product_attribute` = pashop.`id_product_attribute`
          LEFT JOIN `" . _DB_PREFIX_ . "product_attribute_combination` AS combi ON combi.`id_product_attribute` = pashop.`id_product_attribute`
          LEFT JOIN `" . _DB_PREFIX_ . "attribute` as attr ON attr.`id_attribute` = combi.`id_attribute`
-         LEFT JOIN `" . _DB_PREFIX_ . "attribute_lang` as attlang ON attlang.`id_attribute` = attr.`id_attribute` AND attlang.`id_lang` = " . $langID . "
+         LEFT JOIN `" . _DB_PREFIX_ . "attribute_lang` as attlang ON attlang.`id_attribute` = attr.`id_attribute` AND attlang.`id_lang` = " . (int)$langID . "
          LEFT JOIN `" . _DB_PREFIX_ . "attribute_group_lang`AS grouplang ON grouplang.`id_attribute_group` = attr.`id_attribute_group` AND grouplang.`id_lang` = attlang.`id_lang`
-         WHERE prshop.`id_shop` = " . $idShop;
+         WHERE prshop.`id_shop` = " . (int)$idShop;
         if ($only_active === 1) {
             $query .= " AND prshop.`active` = 1";
         }
         if (!empty($date_from)) {
-            $query .= " AND prshop.`date_upd` > '$date_from'";
+            $query .= ' AND prshop.`date_upd` > "'.pSQL($date_from).'"';
         }
 
         if (!empty($product_ids) && count($product_ids) > 0) {
-            $query .= ' AND prshop.`id_product` IN (' . join(',', $product_ids) . ') ';
+            $query .= ' AND prshop.`id_product` IN (' . implode(',', array_map('intval', $product_ids)) . ') ';
         }
 
-        $query .= " ORDER BY prshop.`id_product`  $limit";
+        $query .= " ORDER BY prshop.`id_product` ". (int) $limit;
 
         return $query;
     }

@@ -177,21 +157,12 @@ INNER JOIN `" . _DB_PREFIX_ . "orders` O
         WHERE pt.name = \"product\" GROUP BY  p.id_object ) view_counter on (view_counter.obj_id=producttable.`id_product`) ";

         $mainSqlQuery = "SELECT producttable.id_product, od.sales_count,od.sales,od.purchase_cost FROM 
         `" . _DB_PREFIX_ . "product` AS producttable
                INNER JOIN  `" . _DB_PREFIX_ . "product_shop` AS prshop  ON producttable.`id_product`= prshop.`id_product`
                 INNER JOIN $sqlSubQuerySalesCount
-        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . $idShop;
-
-        //   LEFT JOIN $sqlSubQueryViews
+        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . (int)$idShop;
 
-        // $mainSqlQuery = $this->parseDateAndAddToSqlQuery($mainSqlQuery, 'start_date', '>=', false);
-        // $mainSqlQuery = $this->parseDateAndAddToSqlQuery($mainSqlQuery, 'end_date', '<=', true);
 
         if (Tools::getValue('ids') != null) {
             $splitted = explode(',', Tools::getValue('ids'));

--- a/prixanconnect/controllers/front/ProductsStats.php
+++ b/prixanconnect/controllers/front/ProductsStats.php
@@ -177,66 +161,25 @@ INNER JOIN `" . _DB_PREFIX_ . "orders` O
         WHERE pt.name = \"product\" GROUP BY  p.id_object ) view_counter on (view_counter.obj_id=producttable.`id_product`) ";
         $mainSqlQuery = "SELECT producttable.id_product, od.sales_count,od.sales,od.purchase_cost, view_counter.views FROM 
         `" . _DB_PREFIX_ . "product` AS producttable
                INNER JOIN  `" . _DB_PREFIX_ . "product_shop` AS prshop  ON producttable.`id_product`= prshop.`id_product`
                 INNER JOIN $sqlSubQuerySalesCount
                LEFT JOIN $sqlSubQueryViews
-        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . $idShop;
+        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . (int)$idShop;
 
         if (Tools::getValue('ids') != null) {
             $splitted = explode(',', Tools::getValue('ids'));
             if (count($splitted) > 0) {
-                $mainSqlQuery .= ' AND producttable.id_product IN (' . implode(',', $splitted) . ')';
+                $mainSqlQuery .= ' AND producttable.id_product IN (' . implode(',', array_map('intval', $splitted)) . ')';
             }
         }

--- a/prixanconnect/controllers/front/ProductsViews.php
+++ b/prixanconnect/controllers/front/ProductsViews.php
@@ -176,7 +160,7 @@ class PrixanconnectProductsViewsModuleFr
         `" . _DB_PREFIX_ . "product` AS producttable
                INNER JOIN  `" . _DB_PREFIX_ . "product_shop` AS prshop  ON producttable.`id_product`= prshop.`id_product`
                LEFT JOIN $sqlSubQueryViews
-        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . $idShop;
+        WHERE prshop.`active` = 1 AND prshop.`id_shop` = " . (int)$idShop;

@@ -184,7 +168,7 @@ class PrixanconnectProductsViewsModuleFr
         if (Tools::getValue('ids') != null) {
             $splitted = explode(',', Tools::getValue('ids'));
             if (count($splitted) > 0) {
-                $mainSqlQuery .= ' AND producttable.id_product IN (' . implode(',', $splitted) . ')';
+                $mainSqlQuery .= ' AND producttable.id_product IN (' . implode(',', array_map('intval', $splitted)) . ')';
             }
         }

--- a/prixanconnect/controllers/front/UpdateProducts.php
+++ b/prixanconnect/controllers/front/UpdateProducts.php
@@ -16,18 +16,20 @@ class PrixanconnectUpdateProductsModuleF
     {
         header('Content-type: application/json');
         // $request->getContent();
+
         die(Tools::jsonEncode(array('check' => 'you must call this url with POST method')));
+        
     }
     private function getProductAttributes($product_id)
     {
-        $query = "SELECT id_product_attribute FROM `" . _DB_PREFIX_ . "product_attribute` WHERE id_product=" . $product_id;
+        $query = "SELECT id_product_attribute FROM `" . _DB_PREFIX_ . "product_attribute` WHERE id_product=" . (int)$product_id;
 
         $results = Db::getInstance()->executeS($query);
         return $results;
     }
     private function getProductFromAttributeId($product_attribute_id)
     {
-        $query = "SELECT id_product FROM `" . _DB_PREFIX_ . "product_attribute` WHERE id_product_attribute=" . $product_attribute_id;
+        $query = "SELECT id_product FROM `" . _DB_PREFIX_ . "product_attribute` WHERE id_product_attribute=" . (int)$product_attribute_id;
 
         $results = Db::getInstance()->executeS($query);
         if ($results && count($results) > 0) {

@@ -102,20 +80,14 @@ class PrixanconnectUpdateProductsModuleF

     private function changeProductAttributePrice_mode_impact($id_product, $id_product_attribute, $price, $id_shop)
     {
-        $query = 'SELECT price FROM  `' . _DB_PREFIX_ . 'product` WHERE id_product=' . $id_product;
+        $query = 'SELECT price FROM  `' . _DB_PREFIX_ . 'product` WHERE id_product=' . (int)$id_product;
         $price_result =    Db::getInstance()->executeS($query);
 
         if ($price_result == null || count($price_result) == 0) {
@@ -127,16 +99,11 @@ class PrixanconnectUpdateProductsModuleF
         //only shop
-        $query = 'UPDATE `' . _DB_PREFIX_ . 'product_attribute_shop` SET price=' . $impact_price . ' WHERE id_product_attribute=' . $id_product_attribute;
+        $query = 'UPDATE `' . _DB_PREFIX_ . 'product_attribute_shop` SET price=' . (float) $impact_price . ' WHERE id_product_attribute=' . (int)$id_product_attribute;
         if (!empty($id_shop)) {
-            $query .= ' AND id_shop=' . $id_shop;
+            $query .= ' AND id_shop=' . (int)$id_shop;
         }
 
 
@@ -147,18 +114,17 @@ class PrixanconnectUpdateProductsModuleF
         if (empty($id_shop)) {
             $id_shop = 0;
         }
-        $query = 'INSERT INTO `' . _DB_PREFIX_ . 'specific_price` (id_product,id_product_attribute,price,`from`,`to`,id_shop) VALUES(' . (int) $id_product . ',' . $id_product_attribute . ',' . $price . ',' . "'0000-00-00 00:00:00'" . ',' . "'0000-00-00 00:00:00'" . ',' .  $id_shop . ')';
+        $query = 'INSERT INTO `' . _DB_PREFIX_ . 'specific_price` (id_product,id_product_attribute,price,`from`,`to`,id_shop) VALUES(' . (int) $id_product . ',' . (int) $id_product_attribute . ',' . (float) $price . ',' . "'0000-00-00 00:00:00'" . ',' . "'0000-00-00 00:00:00'" . ',' .  (int) $id_shop . ')';
         return  Db::getInstance()->execute($query);
 
-        // $query = "UPDATE `" . _DB_PREFIX_ . "specific_price` SET `from`='1980-01-01 00:00:00', `to`='2100-01-01 00:00:00' WHERE `id_specific_price`=" . $newSpecId;
-        // return   Db::getInstance()->executeS($query);
+
     }
     private function deleteSpecificPriceForAttribute($id_product, $id_product_attribute, $id_shop)
     {
         if (empty($id_shop)) {
             $id_shop = 0;
         }
-        $query = 'DELETE FROM `' . _DB_PREFIX_ . 'specific_price` WHERE `id_product` = ' . (int) $id_product . ' AND `id_product_attribute` = ' . $id_product_attribute . ' AND id_shop=' . $id_shop;
+        $query = 'DELETE FROM `' . _DB_PREFIX_ . 'specific_price` WHERE `id_product` = ' . (int) $id_product . ' AND `id_product_attribute` = ' . (int) $id_product_attribute . ' AND id_shop=' . (int)$id_shop;
         Db::getInstance()->execute($query);
     }
     private function updateProductPriceWithCleanSpecific($id, $prix_base, $prix_promo, $idShop)
@@ -195,15 +161,21 @@ class PrixanconnectUpdateProductsModuleF
     {
         header('Content-type: application/json');
         $returned = array('success' => false, 'products' => array(), 'error' => null);
+        
         try {
 
             $idShop = Tools::getValue('id_shop');

             if (!empty($idShop)) {
                 $idShop = (int)  $idShop;
             }
+            if (strtoupper(trim($_SERVER['REQUEST_METHOD'])) != 'POST'){
+                throw new Exception('you must call this url with POST method');
+            }
+            $cle_module = Configuration::get('PRIXANCONNECT_CLE');
+            if (Tools::getValue('key') == false || Tools::getValue('key') != $cle_module) {
+                throw new Exception('erreur d\'autorisation');
+            }
 
             // $entityBody = stream_get_contents(STDIN);
             $entityBody = file_get_contents('php://input');

@@ -298,10 +264,10 @@ class PrixanconnectUpdateProductsModuleF
                                         if (!is_numeric($prix_base)) {
                                             throw new Exception('prix_base is not correct');
                                         }
-                                        $query_result =  Db::getInstance()->executeS('update `' . _DB_PREFIX_ . 'pm_advancedpack` SET fixed_price=' . $prix_base  . ' WHERE id_pack=' . $id);
+                                        $query_result =  Db::getInstance()->executeS('update `' . _DB_PREFIX_ . 'pm_advancedpack` SET fixed_price=' . (float)$prix_base  . ' WHERE id_pack=' . (int)$id);
                                         $returned['products'][] = array('id' => $id, 'success' => $query_result);
                                     } else {
-                                        $query_result =  Db::getInstance()->executeS('update `' . _DB_PREFIX_ . 'pm_advancedpack` SET fixed_price=NULL WHERE id_pack=' . $id);
+                                        $query_result =  Db::getInstance()->executeS('update `' . _DB_PREFIX_ . 'pm_advancedpack` SET fixed_price=NULL WHERE id_pack=' . (int)$id);
                                         $returned['products'][] = array('id' => $id, 'success' => $query_result);
                                     }
                                 } else {

Other recommandations

• It’s recommended to upgrade to the latest version of the module prixanconnect.
• 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

2023-03-05

Vulnerability discovered during a code reviews by 202 ecommerce

2023-03-07

Contact the author

2023-04-05

The author confirm the vulnerability without possibility to verify the patch

2023-05-29

Retrieve the patched release and ask to the author to fix all sensitive SQL calls

2023-06-15

Retry to contact Prixan team

2023-08-15

Request a CVE ID from Mitre.org

2023-08-25

Recieved the CVE ID

2023-09-25

Inform the author about the scheduled publication of the CVE. Propose 30 days of delay before disclose.

2023-10-05

Publication of this security advisory

Links

• 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.