CVE-2021-36624
📋 TL;DR
CVE-2021-36624 is a critical SQL injection vulnerability in Phone Shop Sales Management System version 1.0 that allows attackers to bypass authentication and gain unauthorized access. This affects all deployments of this specific software version. Attackers can exploit this remotely without authentication to compromise the system.
💻 Affected Systems
- Sourcecodester Phone Shop Sales Management System
📦 What is this software?
Phone Shop Sales Management System by Phone Shop Sales Management System Project
View all CVEs affecting Phone Shop Sales Management System →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to gain administrative access, steal sensitive data, modify/delete database contents, and potentially achieve remote code execution.
Likely Case
Authentication bypass leading to unauthorized access to the sales management system, data theft, and potential privilege escalation.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation in place.
🎯 Exploit Status
Public exploit code is available on Exploit-DB and GitHub. The exploit is simple to execute with basic SQL injection knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - No official patch from vendor
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Immediately upgrade to a newer version if available. 2. If no newer version exists, implement workarounds or replace the software. 3. Apply input validation and parameterized queries to all SQL statements.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts.
Input Validation Filter
allImplement server-side input validation to sanitize user inputs before processing.
Example PHP: $username = mysqli_real_escape_string($conn, $_POST['username']);
🧯 If You Can't Patch
- Isolate the system on a segmented network with strict access controls
- Implement network-based intrusion detection/prevention systems to monitor for SQL injection patterns
🔍 How to Verify
Check if Vulnerable:
Check if you're running Phone Shop Sales Management System version 1.0. Test authentication endpoints with SQL injection payloads like ' OR '1'='1.Check Version:
Check the application's version file or admin panel. For PHP applications: grep -r 'version' /path/to/application/ or check config files.Verify Fix Applied:
Verify that SQL injection payloads no longer bypass authentication. Test with automated SQL injection scanners or manual testing.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in web server logs
- Multiple failed login attempts followed by successful login with SQL-like patterns
- Authentication logs showing successful logins from unexpected IPs
Network Indicators:
- HTTP requests containing SQL keywords (UNION, SELECT, OR, etc.) in authentication parameters
- Unusual traffic patterns to login endpoints
SIEM Query:
source="web_logs" AND ("' OR" OR "UNION SELECT" OR "--" OR ";--") AND uri="*/login*"