CVE-2021-26228
📋 TL;DR
CVE-2021-26228 is a critical SQL injection vulnerability in CASAP Automated Enrollment System v1.0 that allows remote attackers to execute arbitrary SQL commands via the id parameter in edit_class1.php. This affects all deployments of this specific software version, potentially compromising the entire database and system.
💻 Affected Systems
- CASAP Automated Enrollment System
📦 What is this software?
Casap Automated Enrollment System by Casap Automated Enrollment System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data manipulation, authentication bypass, and potential remote code execution via database functions.
Likely Case
Unauthorized data access and manipulation of enrollment records, potentially exposing sensitive student and administrative information.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
SQL injection via GET/POST parameter is straightforward to exploit. Public GitHub repository shows vulnerability details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
No official patch available. Consider replacing with alternative software or implementing custom fixes with parameterized queries.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection rules to block malicious requests
Input Validation Filter
allImplement input validation to reject malicious id parameter values
Example PHP: if(!is_numeric($_GET['id'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Isolate the system behind a firewall with strict access controls
- Implement database-level protections: minimal privileges, stored procedures, and query logging
🔍 How to Verify
Check if Vulnerable:
Test edit_class1.php?id=1' OR '1'='1 to see if SQL error or unexpected behavior occursCheck Version:
Check application files or documentation for version 1.0 referencesVerify Fix Applied:
Test with SQL injection payloads; system should reject or sanitize input without database errors📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web server logs
- Unusual database queries from web application
- Multiple failed parameter validation attempts
Network Indicators:
- HTTP requests to edit_class1.php with SQL keywords in parameters
- Unusual database port activity from web server
SIEM Query:
source="web_logs" AND uri="*edit_class1.php*" AND (param="*id=*'*" OR param="*id=*%27*")