CVE-2020-21806
📋 TL;DR
CVE-2020-21806 is a critical SQL injection vulnerability in ECTouch v2 e-commerce software that allows attackers to execute arbitrary SQL commands through the shop page parameter in index.php. This affects all ECTouch v2 installations with the vulnerable code path accessible. Attackers can potentially read, modify, or delete database content.
💻 Affected Systems
- ECTouch
📦 What is this software?
Ectouch by Ectouch
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, authentication bypass, and potential remote code execution through database functions.
Likely Case
Data exfiltration of sensitive information including customer data, order details, and administrative credentials stored in the database.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
SQL injection via shop page parameter is straightforward to exploit with common SQL injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in later commits to the ECTouch repository
Vendor Advisory: https://github.com/ectouch/ectouch/issues/5
Restart Required: No
Instructions:
1. Update to the latest ECTouch version from the official repository. 2. Apply the security patch that implements proper input validation and parameterized queries for the shop page parameter. 3. Test the shop functionality after patching.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the shop page parameter before processing
Modify index.php to add: $shop_page = filter_var($_GET['shop_page'], FILTER_SANITIZE_STRING);
WAF Rule
allImplement web application firewall rules to block SQL injection patterns
Add WAF rule: Detect and block SQL injection patterns in shop_page parameter
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries for all user inputs in the shop functionality
- Restrict access to the vulnerable shop page using IP whitelisting or authentication requirements
🔍 How to Verify
Check if Vulnerable:
Test the shop page parameter with SQL injection payloads like: index.php?shop_page=1' OR '1'='1Check Version:
Check ECTouch version in configuration files or admin panelVerify Fix Applied:
Attempt SQL injection tests after patching to confirm they no longer work and return expected error handling📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple requests with SQL-like patterns in shop_page parameter
- Unexpected database queries from web server
Network Indicators:
- HTTP requests containing SQL keywords in shop_page parameter
- Abnormal response patterns from the shop page
SIEM Query:
web.url:*shop_page* AND (web.query:*UNION* OR web.query:*SELECT* OR web.query:*OR '1'='1*)