CVE-2023-27846: [CVE-2023-27846] Improper neutralization of SQL parameter in tvcmsblog module by themevolty for PrestaShop

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In tvcmsblog, dependancies of the theme Electron edited by Themevolty for PrestaShop, an attacker can perform a blind SQL injection.

Summary

• CVE ID: CVE-2023-27846
• Published at: 2023-10-25
• Advisory source: Friends-Of-Presta.org
• Platform: PrestaShop
• Product: tvcmsblog
• Impacted release: < 4.0.8
• Product author: Themevolty
• Weakness: CWE-89
• Severity: critical (9.8)

Description

Multiple sensitive SQL calls in many php classes can be executed with a trivial http call and exploited to forge a blind SQL injection throught the POST or GET submitted “rewrite”, “page_type”, “recordsArray” variables.

WARNING : Be warned that one exploit will bypass some WAF (hijacked unconventional HTTP header) in this CVE-2023-39650

Be warned that this module could own others vulnerabilities.

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

--- 4.0.0/modules/tvcmsblogclasses/tvcmscategoryclass.php
+++ 4.0.0_patched/modules/tvcmsblogclasses/tvcmscategoryclass.php
@@ -83,8 +83,8 @@ class TvcmsCategoryClass extends ObjectM
             return false;
         }
         $sql = 'SELECT xc.`id_tvcmscategory` FROM `' . _DB_PREFIX_ . 'tvcmscategory` xc WHERE '
-            . 'xc.`category_type` = "' . ($category_type ? $category_type : 'category')
-             . '" AND xc.active = 1 AND xc.`id_tvcmscategory` = ' . $id_category;
+            . 'xc.`category_type` = "' . ($category_type ? pSQL($category_type) : 'category')
+             . '" AND xc.active = 1 AND xc.`id_tvcmscategory` = ' . (int) $id_category;
         $rslts = Db::getInstance()->getrow($sql);
 
         return (isset($rslts['id_tvcmscategory']) && !empty($rslts['id_tvcmscategory'])) ? true : false;
@@ -96,7 +96,7 @@ class TvcmsCategoryClass extends ObjectM
             && isset($_FILES['category_img']['tmp_name'])
             && !empty($_FILES['category_img']['tmp_name'])) {
             $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'tvcmscategory` WHERE '
-             . ' `id_tvcmscategory` = ' . Tools::getValue('id_tvcmscategory');
+             . ' `id_tvcmscategory` = ' . (int) Tools::getValue('id_tvcmscategory');
             $res = Db::getInstance()->executeS($sql);
 
             if (file_exists(TVCMSBLOG_IMG_DIR . $res['category_img'])) {
@@ -105,7 +105,7 @@ class TvcmsCategoryClass extends ObjectM
             $this->category_img = TvcmsBlog::uploadMedia('category_img');
         } else {
             $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'tvcmscategory` WHERE '
-             . ' `id_tvcmscategory` = ' . Tools::getValue('id_tvcmscategory');
+             . ' `id_tvcmscategory` = ' . (int) Tools::getValue('id_tvcmscategory');
 
             $res = Db::getInstance()->executeS($sql);
             $this->category_img = $res[0]['category_img'];
@@ -204,8 +204,8 @@ class TvcmsCategoryClass extends ObjectM
             . 'xcl.`id_tvcmscategory` AND xcl.`id_lang` = ' . $id_lang . ') INNER JOIN `' . _DB_PREFIX_
              . 'tvcmscategory_shop` xcs ON (xc.`id_tvcmscategory` = xcs.`id_tvcmscategory` AND xcs.`id_shop` = '
             . $id_shop . ') ';
-        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? $category_type : 'category') . '" AND '
-            . 'xc.`id_tvcmscategory` = ' . $id_category;
+        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? pSQL($category_type) : 'category') . '" AND '
+            . 'xc.`id_tvcmscategory` = ' . (int) $id_category;
         $rslts = Db::getInstance()->getrow($sql);
 
         return $rslts;
@@ -222,8 +222,8 @@ class TvcmsCategoryClass extends ObjectM
              . 'tvcmscategory_lang` xcl ON (xc.`id_tvcmscategory` = xcl.`id_tvcmscategory` AND xcl.`id_lang` = '
             . $id_lang . ') INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xc.`id_tvcmscategory` = '
             . 'xcs.`id_tvcmscategory` AND xcs.`id_shop` = ' . $id_shop . ') ';
-        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? $category_type : 'category')
-             . '" AND xcl.`link_rewrite` = "' . $rewrite . '" ';
+        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? pSQL($category_type) : 'category')
+             . '" AND xcl.`link_rewrite` = "' . pSQL($rewrite) . '" ';
         $rslts = Db::getInstance()->getrow($sql);
 
         return isset($rslts['id_tvcmscategory']) ? $rslts['id_tvcmscategory'] : null;
@@ -241,9 +241,9 @@ class TvcmsCategoryClass extends ObjectM
                     (xc.`id_tvcmscategory` = xcs.`id_tvcmscategory` '
                      . 'AND xcs.`id_shop` = ' . $id_shop . ')
                ';
-        $sql .= ' WHERE xc.`active` = 1 AND  category_type = "' . $category_type . '" ';
+        $sql .= ' WHERE xc.`active` = 1 AND  category_type = "' . pSQL($category_type) . '" ';
         if ($category_group != null) {
-            $sql .= ' AND category_group = ' . $category_group;
+            $sql .= ' AND category_group = ' . (int) $category_group;
         }
         $sql .= ' ORDER BY xc.`position` ASC ';
 
--- 4.0.0/modules/tvcmsblogclasses/tvcmscommentclass.php
+++ 4.0.0_patched/modules/tvcmsblogclasses/tvcmscommentclass.php
@@ -108,7 +108,7 @@ class TvcmsCommentClass extends ObjectMo
         if ($id_post == null) {
             return false;
         }
-        $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'tvcms_comments` xc  WHERE xc.`id_post` = ' . $id_post
+        $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'tvcms_comments` xc  WHERE xc.`id_post` = ' . (int) $id_post
              . ' AND xc.active = 1 ORDER BY xc.position DESC ';
         $rslts = Db::getInstance()->executeS($sql);
 
@@ -121,7 +121,7 @@ class TvcmsCommentClass extends ObjectMo
             return false;
         }
         $sql = 'SELECT COUNT(id_tvcms_comments) AS total_comment FROM `' . _DB_PREFIX_ . 'tvcms_comments` xc '
-             . ' WHERE xc.`id_post` = ' . $id_post;
+             . ' WHERE xc.`id_post` = ' . (int) $id_post;
         $rslts = Db::getInstance()->executeS($sql);
 
         return isset($rslts) ? $rslts['0']['total_comment'] : false;

--- 4.0.0/modules/tvcmsblogclasses/tvcmspostsclass.php
+++ 4.0.0_patched/modules/tvcmsblogclasses/tvcmspostsclass.php
@@ -375,7 +375,7 @@ class TvcmsPostsClass extends ObjectMode
             self::deleteTagPost($id_post);
             if (isset($category_ids) && !empty($category_ids)) {
                 foreach ($category_ids as $id_category) {
-                    $queryval .= '(' . (int) $id_post . ',' . (int) $id_category . ',"' . $tag . '"),';
+                    $queryval .= '(' . (int) $id_post . ',' . (int) $id_category . ',"' . pSQL($tag) . '"),';
                 }
                 $queryval = rtrim($queryval, ',');
                 if (Db::getInstance()->execute('INSERT INTO `' . _DB_PREFIX_
@@ -408,7 +408,7 @@ class TvcmsPostsClass extends ObjectMode
         }
 
         if (Db::getInstance()->execute('DELETE FROM ' . _DB_PREFIX_ . 'tvcms_category_post WHERE id_post = '
-                . $id_post . ' AND type = "' . $tag . '"')) {
+                . (int) $id_post . ' AND type = "' . pSQL($tag) . '"')) {
             return true;
         } else {
             return false;
@@ -429,7 +429,7 @@ class TvcmsPostsClass extends ObjectMode
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmsposts_shop` xcs ON (xc.`id_tvcmsposts` = xcs.`id_tvcmsposts` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? $post_type : 'post') . '" AND xc.`id_tvcmsposts` = ' . $id_post;
+        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? pSQL($post_type) : 'post') . '" AND xc.`id_tvcmsposts` = ' . (int) $id_post;
         $rslts = Db::getInstance()->getrow($sql);
 
         return $rslts;
@@ -447,8 +447,8 @@ class TvcmsPostsClass extends ObjectMode
             . $id_lang . ') INNER JOIN `' . _DB_PREFIX_ . 'tvcmsposts_shop` xcs ON '
              . '(xc.`id_tvcmsposts` = xcs.`id_tvcmsposts` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ') ';
-        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? $post_type : 'post') . '" AND xcl.`link_rewrite` = "'
-            . $rewrite . '" ';
+        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? pSQL($post_type) : 'post') . '" AND xcl.`link_rewrite` = "'
+            . pSQL($rewrite) . '" ';
         $rslts = Db::getInstance()->getrow($sql);
 
         return isset($rslts['id_tvcmsposts']) ? $rslts['id_tvcmsposts'] : null;
@@ -460,7 +460,7 @@ class TvcmsPostsClass extends ObjectMode
             return false;
         }
         $sql = 'SELECT xc.`id_tvcmsposts` FROM `' . _DB_PREFIX_ . 'tvcmsposts` xc WHERE xc.`post_type` = "'
-            . ($post_type ? $post_type : 'post') . '" AND xc.active = 1 AND xc.`id_tvcmsposts` = ' . $id_post;
+            . ($post_type ? pSQL($post_type) : 'post') . '" AND xc.active = 1 AND xc.`id_tvcmsposts` = ' . (int) $id_post;
         $rslts = Db::getInstance()->getrow($sql);
 
         $tmp = $rslts['id_tvcmsposts'];
@@ -483,7 +483,7 @@ class TvcmsPostsClass extends ObjectMode
             . $id_lang . ') INNER JOIN `' . _DB_PREFIX_ . 'tvcmsposts_shop` xcs ON '
              . '(xc.`id_tvcmsposts` = xcs.`id_tvcmsposts` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ') ';
-        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? $post_type : 'post') . '" AND xc.`id_tvcmsposts` = "' . $id . '" ';
+        $sql .= ' WHERE xc.`post_type` = "' . ($post_type ? pSQL($post_type) : 'post') . '" AND xc.`id_tvcmsposts` = "' . (int) $id . '" ';
         $rslts = Db::getInstance()->getrow($sql);
 
         return isset($rslts['link_rewrite']) ? $rslts['link_rewrite'] : null;
@@ -502,8 +502,8 @@ class TvcmsPostsClass extends ObjectMode
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xc.`id_tvcmscategory` = xcs.`id_tvcmscategory` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? $category_type : 'category') . '" AND'
-             . ' xc.`id_tvcmscategory` = ' . $id_category;
+        $sql .= ' WHERE xc.`category_type` = "' . ($category_type ? pSQL($category_type) : 'category') . '" AND'
+             . ' xc.`id_tvcmscategory` = ' . (int) $id_category;
         $rslts = Db::getInstance()->getrow($sql);
 
         return $rslts;
@@ -523,7 +523,7 @@ class TvcmsPostsClass extends ObjectMode
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xc.`id_tvcmscategory` = xcs.`id_tvcmscategory` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xc.`category_type` = "tag" AND xcl.`name` = "' . $tag . '"';
+        $sql .= ' WHERE xc.`category_type` = "tag" AND xcl.`name` = "' . pSQL($tag) . '"';
         $rslts = Db::getInstance()->getrow($sql);
         if (isset($rslts) && !empty($rslts)) {
             return $rslts['id_tvcmscategory'];
@@ -565,7 +565,7 @@ class TvcmsPostsClass extends ObjectMode
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xcp.`id_category` = xcs.`id_tvcmscategory` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xcp.`id_post` = ' . $id_post . ' AND xcp.`type` = "' . $tag . '"';
+        $sql .= ' WHERE xcp.`id_post` = ' . (int) $id_post . ' AND xcp.`type` = "' . pSQL($tag) . '"';
         $rslts = Db::getInstance()->executeS($sql);
         if (isset($rslts) && !empty($rslts)) {
             $countrslts = count($rslts);
@@ -593,13 +593,13 @@ class TvcmsPostsClass extends ObjectMode
         $id_shop = (int) Context::getContext()->shop->id;
         $sql = 'SELECT xcp.`id_category`,xcl.`name`,xcl.`link_rewrite` FROM `' . _DB_PREFIX_ . 'tvcms_category_post` xcp 
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory` xc ON (xcp.`id_category` = xc.`id_tvcmscategory` AND '
-             . 'xc.`category_type` = "' . $tag . '")
+             . 'xc.`category_type` = "' . pSQL($tag) . '")
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_lang` xcl ON (xcp.`id_category` = xcl.`id_tvcmscategory` '
              . 'AND xcl.`id_lang` = ' . $id_lang . ')
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xcp.`id_category` = xcs.`id_tvcmscategory` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xcp.`id_post` = ' . $id_post . ' AND xcp.`type` = "' . $tag . '"';
+        $sql .= ' WHERE xcp.`id_post` = ' . (int) $id_post . ' AND xcp.`type` = "' . pSQL($tag) . '"';
         $rslts = Db::getInstance()->executeS($sql);
         if (isset($rslts) && !empty($rslts)) {
             $i = 0;
@@ -640,7 +640,7 @@ class TvcmsPostsClass extends ObjectMode
         INNER JOIN `' . _DB_PREFIX_ . 'tvcmscategory_shop` xcs ON (xc.`id_tvcmscategory` = xcs.`id_tvcmscategory` '
              . 'AND xcs.`id_shop` = ' . $id_shop . ')
         ';
-        $sql .= ' WHERE xc.`category_type` = "' . $tag . '" ';
+        $sql .= ' WHERE xc.`category_type` = "' . pSQL($tag) . '" ';
         $sql .= ' ORDER BY xc.`id_tvcmscategory` DESC ';
         $sql .= ' LIMIT ' . (int) $count;
         $rslts = Db::getInstance()->executeS($sql);
@@ -684,10 +684,10 @@ class TvcmsPostsClass extends ObjectMode
         ';
         $sql .= ' WHERE xc.`active` = 1 ';
         if ((int) $category != 0) {
-            $sql .= ' AND xc.category = ' . $category;
+            $sql .= ' AND xc.category = ' . (int) $category;
         }
         if ($post_type != null) {
-            $sql .= ' AND xc.post_type = "' . $post_type . '" ';
+            $sql .= ' AND xc.post_type = "' . pSQL($post_type) . '" ';
         }
         $sql .= ' ORDER BY xc.`position` DESC ';
         $queryexec = Db::getInstance()->getrow($sql);
@@ -720,10 +720,13 @@ class TvcmsPostsClass extends ObjectMode
         ';
         $sql .= ' WHERE xc.`active` = 1 ';
         if ((int) $category != 0) {
-            $sql .= ' AND xc.category = ' . $category;
+            $sql .= ' AND xc.category = ' . (int) $category;
         }
         if ($post_type != null) {
-            $sql .= ' AND xc.post_type = "' . $post_type . '" ';
+            $sql .= ' AND xc.post_type = "' . pSQL($post_type) . '" ';
+        }
+        if (Validate::isOrderWay($order_by) === false){
+           $order_by = 'DESC';
         }
         $sql .= ' ORDER BY xc.`position`  ' . $order_by;
         $sql .= ' LIMIT ' . (((int) $p - 1) * (int) $n) . ',' . (int) $n;
@@ -839,7 +842,10 @@ class TvcmsPostsClass extends ObjectMode
         ';
         $sql .= ' WHERE xc.`active` = 1 ';
         if ($post_type != null) {
-            $sql .= ' AND xc.post_type = "' . $post_type . '" ';
+            $sql .= ' AND xc.post_type = "' . pSQL($post_type) . '" ';
+        }
+        if (Validate::isOrderWay($order_by) === false){
+           $order_by = 'DESC';
         }
         $sql .= ' ORDER BY xc.`comment_count` ' . $order_by;
         $sql .= ' LIMIT ' . (int) $count;
@@ -940,7 +946,10 @@ class TvcmsPostsClass extends ObjectMode
         ';
         $sql .= ' WHERE xc.`active` = 1 ';
         if ($post_type != null) {
-            $sql .= ' AND xc.post_type = "' . $post_type . '" ';
+            $sql .= ' AND xc.post_type = "' . pSQL($post_type) . '" ';
+        }
+        if (Validate::isOrderWay($order_by) === false){
+           $order_by = 'DESC';
         }
         $sql .= ' ORDER BY xc.`id_tvcmsposts` ' . $order_by;
         $sql .= ' LIMIT ' . (int) $count;
@@ -1172,7 +1181,10 @@ class TvcmsPostsClass extends ObjectMode
         ';
         $sql .= ' WHERE xc.`active` = 1 ';
         if ($post_type != null) {
-            $sql .= ' AND xc.post_type = "' . $post_type . '" ';
+            $sql .= ' AND xc.post_type = "' . pSQL($post_type) . '" ';
+        }
+        if (Validate::isOrderWay($order_by) === false){
+           $order_by = 'DESC';
         }
         $sql .= ' ORDER BY xc.`position`  ' . $order_by;
         $sql .= ' LIMIT ' . (((int) $p - 1) * (int) $n) . ',' . (int) $n;

Other recommendations

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

2023-02-10

Issue discovered during a code review by TouchWeb.fr and documented by 202-ecommerce.com

2023-02-10

Contact PrestaShop Addons security Team to confirm version scope by author

2023-02-15

The author provided a patch, but it still contains all the critical vulnerabilities.

2023-03-05

Request a CVE ID

2023-03-16

Received CVE ID

2023-04-13

Recontact PrestaShop Addons security Team to confirm version scope by author

2023-10-25

Publish this advisory and the CVE

Links

• PrestaShop addons product page
• Author 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.