CVE-2024-22824
📋 TL;DR
CVE-2024-22824 is a critical unrestricted file upload vulnerability in Timo v.2.0.3 that allows remote attackers to bypass filetype restrictions and upload malicious files, leading to arbitrary code execution. This affects all systems running the vulnerable Timo version, particularly web applications using the UploadController.java component. Attackers can compromise the entire system if successful.
💻 Affected Systems
- Timo
📦 What is this software?
Timo by Auntvt
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with full remote code execution, data theft, ransomware deployment, and lateral movement to other systems.
Likely Case
Webshell upload leading to persistent backdoor access, data exfiltration, and potential privilege escalation on the affected server.
If Mitigated
Limited impact with proper file upload validation, restricted execution permissions, and network segmentation preventing lateral movement.
🎯 Exploit Status
The GitHub issue shows exploitation details; weaponization is likely due to the high CVSS score and public disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/auntvt/Timo/issues/6
Restart Required: Yes
Instructions:
1. Monitor the GitHub repository for patches. 2. If available, update to the patched version. 3. Restart the Timo application. 4. Verify the fix by testing file upload functionality.
🔧 Temporary Workarounds
Implement Strict File Upload Validation
allAdd server-side validation to restrict file types, check file signatures, and limit upload sizes.
Disable Upload Functionality
allTemporarily disable or restrict access to the upload endpoint until patched.
🧯 If You Can't Patch
- Implement network segmentation to isolate the vulnerable system from critical assets.
- Deploy a web application firewall (WAF) with rules to block malicious file uploads and monitor for exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check if running Timo v2.0.3 and if the UploadController.java component is accessible via web interface or API.Check Version:
Check application configuration files or deployment manifests for version information.Verify Fix Applied:
Test file upload functionality with restricted file types; successful uploads should be blocked for unauthorized file types.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads, especially with executable extensions like .jsp, .war, .php
- Failed upload attempts with suspicious file types
- Increased upload activity from single IPs
Network Indicators:
- HTTP POST requests to upload endpoints with unusual file extensions
- Traffic spikes to upload URLs
SIEM Query:
source="web_logs" AND (url="*upload*" OR url="*UploadController*") AND (file_extension="jsp" OR file_extension="war" OR file_extension="php")