CVE-2021-41649
📋 TL;DR
CVE-2021-41649 is an unauthenticated SQL injection vulnerability in PuneethReddyHC's online-shopping-system-advanced through the /homeaction.php cat_id parameter. Attackers can execute arbitrary SQL commands without authentication, potentially compromising the database. Anyone using this shopping system software is affected.
💻 Affected Systems
- PuneethReddyHC online-shopping-system-advanced
📦 What is this software?
Online Shopping System Advanced by Online Shopping System Advanced Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data manipulation, and potential remote code execution via database functions.
Likely Case
Database information disclosure, data manipulation, and potential authentication bypass.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-sensitive data.
🎯 Exploit Status
Simple SQL injection via POST request to /homeaction.php with cat_id parameter. Public proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Manually implement input validation and parameterized queries in homeaction.php
2. Sanitize all user inputs before database queries
3. Update to a secure version if available from the project maintainer
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF rules to block SQL injection patterns in POST requests to /homeaction.php
Input Validation Filter
allImplement server-side input validation to only accept numeric values for cat_id parameter
Add PHP validation: if(!is_numeric($_POST['cat_id'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Isolate the vulnerable system behind a reverse proxy with strict input validation
- Implement network segmentation to limit database access from the web application
🔍 How to Verify
Check if Vulnerable:
Send POST request to /homeaction.php with cat_id parameter containing SQL injection payload like ' OR '1'='1Check Version:
Check PHP files for version information or project documentationVerify Fix Applied:
Test with SQL injection payloads and verify they are rejected or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple POST requests to /homeaction.php with suspicious parameters
Network Indicators:
- POST requests to /homeaction.php containing SQL keywords in parameters
- Unusual database query patterns from web server
SIEM Query:
source="web_logs" AND uri="/homeaction.php" AND (param="cat_id" AND value MATCHES "(?i)(union|select|insert|update|delete|drop|or|and|'|--|#)")🔗 References
- https://awesomeopensource.com/project/PuneethReddyHC/online-shopping-system
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-41649
- https://streamable.com/aii806
- https://streamable.com/mnn7dn
- https://awesomeopensource.com/project/PuneethReddyHC/online-shopping-system
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-41649
- https://streamable.com/aii806
- https://streamable.com/mnn7dn
