CVE-2020-25952
📋 TL;DR
CVE-2020-25952 is a critical SQL injection vulnerability in PHPGurukul User Registration & Login and User Management System that allows remote attackers to execute arbitrary SQL commands and bypass authentication. This affects all systems running version 2.1 of the software, potentially compromising the entire application and underlying database.
💻 Affected Systems
- PHPGurukul User Registration & Login and User Management System With admin panel
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise including database takeover, data exfiltration, privilege escalation to admin, and potential remote code execution on the underlying server.
Likely Case
Authentication bypass leading to unauthorized admin access, data manipulation or theft from the database, and potential lateral movement within the network.
If Mitigated
Limited impact with proper input validation and parameterized queries in place, potentially preventing successful exploitation.
🎯 Exploit Status
Multiple public exploit scripts are available, including on Exploit-DB. The vulnerability requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - No official patch released by vendor
Vendor Advisory: No official vendor advisory available
Restart Required: No
Instructions:
1. Check if you're running version 2.1. 2. If vulnerable, immediately upgrade to a newer version if available. 3. If no newer version exists, implement manual fixes or replace the software entirely.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and parameterized queries in all PHP files that handle user input
Replace direct SQL concatenation with prepared statements: $stmt = $conn->prepare('SELECT * FROM users WHERE username = ?'); $stmt->bind_param('s', $username);
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts
🧯 If You Can't Patch
- Isolate the vulnerable system from the internet and restrict network access to only necessary connections
- Implement strict monitoring and alerting for SQL injection attempts in application logs
🔍 How to Verify
Check if Vulnerable:
Check the software version in the admin panel or configuration files. If version is 2.1, the system is vulnerable.Check Version:
Check config.php or similar configuration files for version information, or look at the admin panel interface.Verify Fix Applied:
Test authentication bypass attempts and SQL injection payloads against the login and user management endpoints to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in application logs
- Multiple failed login attempts followed by successful admin login from unusual IP
- SQL error messages containing user-supplied input
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, INSERT, etc.) in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND ("' OR" OR "UNION SELECT" OR "--" OR ";--" OR "admin'--")🔗 References
- https://phpgurukul.com/
- https://systemweakness.com/cve-2020-25952-f60fff8ffac
- https://th3cyb3rc0p.medium.com/cve-2020-25952-f60fff8ffac
- https://www.exploit-db.com/exploits/49052
- https://phpgurukul.com/
- https://systemweakness.com/cve-2020-25952-f60fff8ffac
- https://th3cyb3rc0p.medium.com/cve-2020-25952-f60fff8ffac
- https://www.exploit-db.com/exploits/49052
