CVE-2020-24877
📋 TL;DR
This SQL injection vulnerability in zzzphp v1.8.0 allows attackers to execute arbitrary SQL commands through the /form/index.php?module=getjson endpoint. This can lead to unauthorized data access, modification, or deletion. Anyone running zzzphp v1.8.0 with the vulnerable endpoint accessible is affected.
💻 Affected Systems
- zzzphp
📦 What is this software?
Zzzphp by Zzzcms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data destruction, and potential remote code execution through database functions.
Likely Case
Unauthorized data access and potential privilege escalation leading to administrative access.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized. The public GitHub issue demonstrates exploitation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.8.1 or later
Vendor Advisory: https://github.com/h4ckdepy/zzzphp/issues/1
Restart Required: No
Instructions:
1. Download the latest version from the official repository. 2. Replace the vulnerable /form/index.php file. 3. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allAdd parameter validation to filter SQL injection attempts in the getjson module.
Edit /form/index.php and add input sanitization for the module parameter
Endpoint Restriction
allBlock access to the vulnerable endpoint using web server configuration.
# Apache: <Location "/form/index.php"> Deny from all </Location>
# Nginx: location ~ /form/index.php { deny all; }
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with SQL injection rules
- Restrict database user permissions to read-only where possible
🔍 How to Verify
Check if Vulnerable:
Test the endpoint with SQL injection payloads: /form/index.php?module=getjson' OR '1'='1Check Version:
Check the zzzphp version in the application files or admin panelVerify Fix Applied:
Test the same payloads after patching - they should return error messages or no data instead of executing SQL.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple requests to /form/index.php with SQL keywords
Network Indicators:
- HTTP requests containing SQL injection patterns to the vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="/form/index.php" AND (query="*SELECT*" OR query="*UNION*" OR query="*OR '1'='1*")