CVE-2021-43084
📋 TL;DR
This SQL injection vulnerability in Dreamer CMS 4.0.0 allows attackers to execute arbitrary SQL commands via the tableName parameter. This can lead to unauthorized data access, modification, or deletion. All systems running the vulnerable version are affected.
💻 Affected Systems
- Dreamer CMS
📦 What is this software?
Dreamer Cms by Iteachyou
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data destruction, and potential remote code execution if database functions allow it.
Likely Case
Unauthorized data access and potential privilege escalation through database manipulation.
If Mitigated
Limited impact with proper input validation and parameterized queries in place.
🎯 Exploit Status
SQL injection via tableName parameter is straightforward to exploit with basic SQL knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://gitee.com/isoftforce/dreamer_cms/issues/I4F93V
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for the tableName parameter to only allow expected values.
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious requests.
🧯 If You Can't Patch
- Isolate the affected system from the internet and restrict access to trusted networks only.
- Implement network segmentation to limit the blast radius if exploitation occurs.
🔍 How to Verify
Check if Vulnerable:
Test the tableName parameter with SQL injection payloads (e.g., ' OR '1'='1) and observe if database errors or unexpected behavior occurs.Check Version:
Check the CMS version in the admin panel or configuration files.Verify Fix Applied:
After implementing fixes, retest with SQL injection payloads to ensure they are blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Database error messages containing SQL syntax
Network Indicators:
- HTTP requests with SQL keywords in tableName parameter
SIEM Query:
source="web_logs" AND (tableName CONTAINS "UNION" OR tableName CONTAINS "SELECT" OR tableName CONTAINS "OR")