CVE-2022-28531

9.8 CRITICAL

📋 TL;DR

This vulnerability allows attackers to execute arbitrary SQL commands through the username field in the admin login page of Covid-19 Directory on Vaccination System 1.0. This can lead to authentication bypass, data theft, or complete system compromise. Organizations using this specific software version are affected.

💻 Affected Systems

Products:
  • Covid-19 Directory on Vaccination System
Versions: 1.0
Operating Systems: Any OS running PHP web server
Default Config Vulnerable: ⚠️ Yes
Notes: Affects all deployments of version 1.0 regardless of configuration. The vulnerability is in the core authentication code.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system takeover: attacker gains administrative access, extracts all database contents (including sensitive vaccination data), and potentially executes arbitrary code on the server.

🟠

Likely Case

Authentication bypass leading to unauthorized administrative access, followed by data exfiltration of vaccination records and personal information.

🟢

If Mitigated

Attack detected and blocked at the network perimeter or application firewall level, preventing successful exploitation.

🌐 Internet-Facing: HIGH - The vulnerability is in a web application login page, making internet-facing deployments extremely vulnerable to automated attacks.
🏢 Internal Only: HIGH - Even internally deployed systems are vulnerable to insider threats or compromised internal systems.

🎯 Exploit Status

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

Public exploit details available on Packet Storm Security. SQL injection in login forms is commonly weaponized in automated attack tools.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown

Vendor Advisory: None found

Restart Required: No

Instructions:

No official patch available. Consider migrating to alternative software or implementing custom fixes with proper input validation and parameterized queries.

🔧 Temporary Workarounds

Web Application Firewall (WAF)

all

Deploy a WAF with SQL injection protection rules to block malicious login attempts.

Input Validation Filter

all

Implement custom input validation to sanitize username field before processing.

Example PHP: $username = mysqli_real_escape_string($conn, $_POST['txtusername']);

🧯 If You Can't Patch

  • Isolate the system on a separate network segment with strict access controls
  • Implement network-based intrusion detection to monitor for SQL injection attempts

🔍 How to Verify

Check if Vulnerable:

Test the admin/login.php page with SQL injection payloads like: ' OR '1'='1 in the username field.

Check Version:

Check the software version in the application interface or configuration files.

Verify Fix Applied:

Attempt SQL injection payloads after implementing fixes; successful login should only occur with valid credentials.

📡 Detection & Monitoring

Log Indicators:

  • Unusual SQL syntax in login attempts
  • Multiple failed login attempts with SQL keywords
  • Successful admin login from unexpected IP addresses

Network Indicators:

  • HTTP POST requests to admin/login.php containing SQL keywords like UNION, SELECT, OR

SIEM Query:

source="web_logs" AND uri="/admin/login.php" AND (request_body CONTAINS "UNION" OR request_body CONTAINS "SELECT" OR request_body CONTAINS "' OR '")

🔗 References

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