CVE-2022-45982
📋 TL;DR
This CVE describes a deserialization vulnerability in ThinkPHP framework that allows attackers to execute arbitrary code on affected systems. Attackers can exploit this by sending specially crafted payloads to vulnerable endpoints. All applications using affected ThinkPHP versions are at risk.
💻 Affected Systems
- ThinkPHP
📦 What is this software?
Thinkphp by Thinkphp
Thinkphp by Thinkphp
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, or creation of persistent backdoors.
Likely Case
Remote code execution allowing attackers to install malware, exfiltrate sensitive data, or pivot to internal networks.
If Mitigated
Limited impact with proper network segmentation, WAF rules, and input validation in place.
🎯 Exploit Status
Public exploit code available; exploitation requires sending crafted HTTP requests to vulnerable endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ThinkPHP 6.0.14 and 6.1.2
Vendor Advisory: https://github.com/top-think/framework/releases
Restart Required: No
Instructions:
1. Update ThinkPHP framework to version 6.0.14 or 6.1.2 or later. 2. Update composer.json to require the patched version. 3. Run composer update. 4. Test application functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to filter deserialization attempts
Implement custom middleware to validate and sanitize all user input before processing
WAF Rule Implementation
allDeploy web application firewall rules to block deserialization payloads
Add WAF rules to detect and block serialized object patterns in HTTP requests
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check ThinkPHP version in composer.json or via framework's version methodCheck Version:
php think versionVerify Fix Applied:
Verify ThinkPHP version is 6.0.14+ or 6.1.2+ and test with known exploit payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests with serialized data patterns
- PHP error logs showing deserialization errors
- Unexpected process execution from web server
Network Indicators:
- HTTP requests containing serialized object patterns
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" AND ("__destruct" OR "__wakeup" OR "O:" OR "C:" OR "a:" OR "s:") AND status=200