Headline

CVE-2023-27570: [CVE-2023-27569]-[CVE-2023-27570] Improper neutralization of SQL parameters in Profileo : Tracking et Conversions (eo_tags) module for PrestaShop

The eo_tags package before 1.4.19 for PrestaShop allows SQL injection via a crafted _ga cookie.

1 year ago

In the module Tracking et Conversions (eo_tags) prior to version 1.4.19, an anonymous user can perform an SQL injection attack.

Summary

CVE ID: CVE-2023-27569 and CVE-2023-27570
Published at: 2023-03-15
Advisory source: Friends-Of-Presta
Vendor: PrestaShop
Product: eo_tags
Impacted release: >= 1.2.0, < 1.4.19 (1.4.19 fixed the vulnerability)
Product author: Profileo
Weakness: CWE-89
Severity: critical (9.8)

Description

From version 1.2.0 published on Nov 17, 2017 to 1.4.18 published on Feb 21, 2023 (fixed in 1.4.19, published on Feb 28, 2023), an HTTP request can be forged with a compromized _ga cookie in order to exploit an insecure parameter in function saveGanalyticsCookie() and gaParseCookie(), which could lead to a SQL injection.

From version 1.2.0 published on Nov 17, 2017 to 1.2.19 published on Oct 22, 2019 (fixed in 1.3.0), an HTTP request can be forged with a compromised User-Agent or Referer in order to exploit insecure parameters in trackReferrer() function, which could lead to a SQL injection. As from 1.2.1, the code has been migrated to classes/EoTagsStats.php (EoTagsStats::setNewGuest()) and the vulnerability now requires Privileges (PR) and user interaction (UI) to be exploited, reducing the severity to 8.0.

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
Technical and personal data leaks

Proof of concept

curl -v -H "User-agent:1','1');SELECT SLEEP(5);--" 'https://example.test/'
curl -v -H "User-agent:1','1');SELECT SLEEP(5);--" 'https://example.test/?force_eo_tags_tracking=1'
curl -v --cookie "PrestaShop-xyz" --cookie "_ga=1.1.1','1')%3BSELECT SLEEP(5)%3B--" 'https://example.test/order'

Patch

If present in eo_tags.php

--- a/eo_tags.php
+++ b/eo_tags.php
@@ -1495,8 +1495,8 @@ class Eo_Tags extends Module
                 $old_cid = $this->getAnalyticsCID($this->context->cart->id);
                 $data = array(
                     'id_cart' => $this->context->cart->id,
-                    'cid'     => $cid,
-                    'cookie'  => serialize($_COOKIE['_ga']),
+                    'cid'     => pSQL($cid),
+                    'cookie'  => pSQL(serialize($_COOKIE['_ga'])),
                 );
                 if (!$old_cid) {
                     Db::getInstance()->insert('eo_tags_ga_cookie', $data);


--- a/eo_tags.php
+++ b/eo_tags.php
@@ -1356,11 +1356,11 @@ class Eo_Tags extends Module
                 ';
                 if ($referral = Db::getInstance()->getRow($sql2)) {
                     $data = array(
-                        'id_guest'     => $cookie->id_guest,
+                        'id_guest'     => (int)$cookie->id_guest,
                         'ip_address'   => $referral['ip_address'],
-                        'http_referer' => $referral['http_referer'],
-                        'request_uri'  => $referral['request_uri'],
-                        'user_agent'   => $user_agent,
+                        'http_referer' => pSQL($referral['http_referer']),
+                        'request_uri'  => pSQL($referral['request_uri']),
+                        'user_agent'   => pSQL($user_agent),
                         'date_add'     => $referral['date_add'],
                     );
                 }
@@ -1397,11 +1397,11 @@ class Eo_Tags extends Module
             $request_uri = substr($request_uri, 0, 255);
 
             $data = array(
-                'id_guest'     => $cookie->id_guest,
+                'id_guest'     => (int)$cookie->id_guest,
                 'ip_address'   => $ip_address,
-                'http_referer' => $http_referer,
-                'request_uri'  => $request_uri,
-                'user_agent'   => $user_agent,
+                'http_referer' => pSQL($http_referer),
+                'request_uri'  => pSQL($request_uri),
+                'user_agent'   => pSQL($user_agent),
                 'date_add'     => date('Y-m-d H:i:s'),
             );
         }

If present in classes/EoTagsStats.php EoTagsStats::setNewGuest()

--- a/classes/EoTagsStats.php
+++ b/classes/EoTagsStats.php
@@ -26,7 +26,7 @@ class EoTagsStats {
         $data = array(
             'id_customer' => $id_customer,
             'ip_address'  => $ip_address,
-            'user_agent'  => $user_agent,
+            'user_agent'  => pSQL($user_agent),
             'date_add'    => date('Y-m-d H:i:s'),
         );

Profileo thanks TouchWeb.fr for its help discovering the vulnerability. Feel free to contact security/at/profileo.com if you wish to receive a PHP script to automatically detect and patch this vulnerability on your website.

Other recommandations

Upgrade PrestaShop beyond 1.7.8.8 (and 8.0.1) to disable multiquery executions (separated by “;”).
Change the default database prefix ps_ by a new longer arbitrary prefix. Nethertheless, be warned that this is useless against blackhat 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 these set of rules.

Timeline

Date

Action

2023-02-24

Discovery of the vulnerability by TouchWeb.fr

2023-02-25

Vulnerability confirmed by Profileo

2023-02-28

Patch created by Profileo and release of version 1.4.19 fixing the issue

2023-03-01

Patch released to customers

2023-03-15