CVE-2024-44902
📋 TL;DR
A deserialization vulnerability in ThinkPHP versions 6.1.3 through 8.0.4 allows attackers to execute arbitrary code by sending specially crafted requests. This affects all applications using vulnerable ThinkPHP versions, potentially leading to complete system compromise.
💻 Affected Systems
- ThinkPHP
📦 What is this software?
Thinkphp by Thinkphp
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, data theft, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution leading to web server compromise, data exfiltration, and cryptocurrency mining malware deployment.
If Mitigated
Limited impact with proper network segmentation, WAF filtering, and minimal privileges, though risk remains significant.
🎯 Exploit Status
Public exploit code available on GitHub, making exploitation trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.0.5
Vendor Advisory: http://thinkphp.com
Restart Required: No
Instructions:
1. Update ThinkPHP to version 8.0.5 or later. 2. Replace all framework files with patched version. 3. Test application functionality after update.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject serialized data in HTTP requests.
Add input filtering middleware to reject unserialize() operations on user input
WAF Rule Implementation
allDeploy web application firewall rules to block deserialization payloads.
Configure WAF to block requests containing serialized PHP object patterns
🧯 If You Can't Patch
- Isolate affected systems behind strict network segmentation
- Implement application-level input sanitization and disable unserialize() on user input
🔍 How to Verify
Check if Vulnerable:
Check ThinkPHP version in composer.json or framework files. If version is between 6.1.3 and 8.0.4 inclusive, system is vulnerable.Check Version:
grep -r "version" composer.json | grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+'Verify Fix Applied:
Verify ThinkPHP version is 8.0.5 or higher. Test with known exploit payloads to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests with serialized data patterns
- PHP unserialize() errors in application logs
- Unexpected process execution from web server user
Network Indicators:
- HTTP requests containing serialized PHP object patterns
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" AND ("unserialize" OR "O:" OR "C:" OR "a:" in request_body)