CVE-2020-28138
📋 TL;DR
CVE-2020-28138 is a SQL injection vulnerability in the login.php file of SourceCodester Online Clothing Store 1.0, allowing attackers to execute arbitrary SQL commands via the txtUserName parameter. This affects all installations of version 1.0 of this specific e-commerce software. Attackers can potentially bypass authentication, access sensitive data, or compromise the entire database.
💻 Affected Systems
- SourceCodester Online Clothing Store
📦 What is this software?
Online Clothing Store by Online Clothing Store Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, authentication bypass, privilege escalation, and potential remote code execution on the underlying server.
Likely Case
Authentication bypass allowing unauthorized access to the admin panel, followed by data exfiltration of customer information and order details.
If Mitigated
Limited impact if proper input validation and parameterized queries are implemented, restricting attackers to error-based SQL injection with minimal data exposure.
🎯 Exploit Status
Public exploit code is available on Exploit-DB (ID: 48429). The vulnerability requires no authentication and has simple exploitation steps.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. The vendor has not released a fixed version. Consider migrating to alternative software or implementing custom fixes.
🔧 Temporary Workarounds
Implement Input Validation and Parameterized Queries
allModify login.php to validate and sanitize the txtUserName parameter using prepared statements with parameterized queries.
Edit login.php to replace raw SQL queries with PDO or mysqli prepared statements
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block SQL injection patterns in login requests.
Configure WAF to detect and block SQL injection patterns in POST parameters
🧯 If You Can't Patch
- Isolate the application behind a reverse proxy with strict input filtering
- Implement network segmentation to limit database access from the web server
🔍 How to Verify
Check if Vulnerable:
Test the login endpoint with SQL injection payloads in the txtUserName parameter (e.g., ' OR '1'='1) and observe if authentication is bypassed or SQL errors are returned.Check Version:
Check the software version in the application's admin panel or configuration files.Verify Fix Applied:
After implementing fixes, attempt the same SQL injection tests and verify that they are blocked or properly handled without allowing unauthorized access.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in web server logs
- Multiple failed login attempts with SQL-like patterns in username field
- Successful admin logins from unexpected IP addresses
Network Indicators:
- HTTP POST requests to login.php containing SQL keywords in parameters
- Unusual database query patterns from the web server
SIEM Query:
source="web_logs" AND uri="/login.php" AND (param="txtUserName" AND value MATCH "' OR|UNION SELECT|--"))