CVE-2023-3302
📋 TL;DR
This vulnerability allows CSV formula injection in Admidio, enabling attackers to execute arbitrary commands or exfiltrate data when users open malicious CSV files. It affects Admidio installations prior to version 4.2.9. Users who import CSV files into Admidio are at risk.
💻 Affected Systems
- Admidio
📦 What is this software?
Admidio by Admidio
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment if combined with other vulnerabilities.
Likely Case
Data exfiltration, privilege escalation, or unauthorized access to sensitive information through formula injection.
If Mitigated
Limited impact with proper input validation and user education about opening untrusted CSV files.
🎯 Exploit Status
Exploitation requires user to import malicious CSV file; proof-of-concept available in public references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.2.9
Vendor Advisory: https://github.com/admidio/admidio/commit/c87a7074a1a73c4851263060afd76aa4d5b6415f
Restart Required: No
Instructions:
1. Backup your Admidio installation and database. 2. Download Admidio 4.2.9 or later from official repository. 3. Replace existing files with patched version. 4. Verify installation integrity.
🔧 Temporary Workarounds
Disable CSV Import
allTemporarily disable CSV import functionality until patching is complete.
Modify Admidio configuration to remove CSV import permissions
Input Validation Filter
allImplement server-side filtering for CSV formula elements.
Add input sanitization for CSV data before processing
🧯 If You Can't Patch
- Restrict CSV import permissions to trusted administrators only
- Implement network segmentation to isolate Admidio server from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Admidio version in administration panel or via version.php file; versions below 4.2.9 are vulnerable.Check Version:
Check Admidio admin panel or view version.php file contentVerify Fix Applied:
Verify version is 4.2.9 or higher and test CSV import with formula elements to ensure proper neutralization.📡 Detection & Monitoring
Log Indicators:
- Unusual CSV import activity
- Formula elements in CSV processing logs
- Unexpected system command execution
Network Indicators:
- Suspicious outbound connections following CSV imports
- Data exfiltration patterns
SIEM Query:
Search for CSV file imports containing formula characters like =, +, -, @ followed by unusual system activity