CVE-2020-36064

9.8 CRITICAL

📋 TL;DR

Online Course Registration v1.0 contains hardcoded credentials in its source code, allowing attackers to bypass authentication and gain administrative access to the control panel. This affects any organization using this specific PHP application version. The vulnerability is particularly dangerous because it provides direct access to sensitive administrative functions.

💻 Affected Systems

Products:
  • Online Course Registration
Versions: v1.0
Operating Systems: Any OS running PHP
Default Config Vulnerable: ⚠️ Yes
Notes: This is a specific PHP application from sourcecodester.com; other course registration systems are not affected unless they share the same vulnerable codebase.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete compromise of the application with administrative privileges, allowing data theft, modification of course registrations, user account takeover, and potential server compromise if the application has elevated permissions.

🟠

Likely Case

Unauthorized access to administrative functions, manipulation of course data, exposure of student information, and potential privilege escalation within the application.

🟢

If Mitigated

Limited impact if application is isolated, uses proper network segmentation, and has additional authentication layers beyond the vulnerable control panel.

🌐 Internet-Facing: HIGH
🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes
Weaponized: LIKELY
Unauthenticated Exploit: ⚠️ Yes
Complexity: LOW

Exploitation requires finding the hardcoded credentials in source code or using known default credentials. The GitHub reference shows public discussion of the vulnerability.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown

Vendor Advisory: None available

Restart Required: No

Instructions:

1. Download the source code from sourcecodester.com
2. Search for hardcoded credentials in PHP files
3. Replace hardcoded credentials with secure authentication
4. Implement proper password hashing
5. Deploy updated code to production

🔧 Temporary Workarounds

Remove Hardcoded Credentials

linux

Manually locate and remove hardcoded username/password combinations from PHP source files

grep -r 'password\|username\|admin' *.php
sed -i 's/hardcoded_password/secure_hash/' vulnerable_file.php

Implement Additional Authentication

all

Add IP whitelisting or multi-factor authentication to the control panel

🧯 If You Can't Patch

  • Isolate the application behind a VPN or internal network only
  • Implement web application firewall rules to block access to control panel paths

🔍 How to Verify

Check if Vulnerable:

Search source code for hardcoded credentials using: grep -r 'password\|admin\|root' *.php

Check Version:

Check application documentation or source code comments for version information

Verify Fix Applied:

Attempt to authenticate with previously known hardcoded credentials; successful fix should reject these credentials

📡 Detection & Monitoring

Log Indicators:

  • Multiple failed login attempts followed by successful login with default credentials
  • Administrative access from unusual IP addresses
  • Access to control panel without proper authentication events

Network Indicators:

  • HTTP requests to admin/control panel paths without preceding login sequences
  • Traffic patterns showing administrative functions from non-admin users

SIEM Query:

source="web_logs" AND (uri_path="/admin" OR uri_path="/control") AND NOT user_agent="admin_browser" | stats count by src_ip

🔗 References

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