CVE-2024-11315
📋 TL;DR
CVE-2024-11315 is a critical path traversal vulnerability in TRCore's DVC that allows unauthenticated remote attackers to upload arbitrary files to any directory. This can lead to remote code execution through webshell deployment. All systems running vulnerable versions of TRCore DVC are affected.
💻 Affected Systems
- TRCore DVC
📦 What is this software?
Dvc by Trcore
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, data theft, ransomware deployment, and persistent backdoor installation.
Likely Case
Attackers upload webshells to gain initial access, then move laterally to compromise other systems and steal sensitive data.
If Mitigated
Limited to denial of service if file uploads are blocked, but system remains vulnerable to other attacks.
🎯 Exploit Status
Simple path traversal combined with unrestricted file upload makes exploitation trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-8255-0bb1a-2.html
Restart Required: Yes
Instructions:
1. Check current DVC version
2. Download and apply vendor patch
3. Restart DVC service
4. Verify patch application
🔧 Temporary Workarounds
Block Unauthenticated File Uploads
allImplement authentication requirement for all file upload endpoints
Configure web server/application to require authentication for upload endpoints
Implement File Type Restrictions
allRestrict uploads to specific safe file extensions only
Configure application to only accept .jpg, .png, .pdf, etc. and reject executable extensions
🧯 If You Can't Patch
- Implement network segmentation to isolate DVC systems from critical assets
- Deploy WAF with rules to detect and block path traversal and malicious file upload patterns
🔍 How to Verify
Check if Vulnerable:
Check if DVC allows unauthenticated file uploads to arbitrary directories via path traversalCheck Version:
Check DVC documentation or admin interface for version informationVerify Fix Applied:
Test that authenticated uploads are required and path traversal is prevented📡 Detection & Monitoring
Log Indicators:
- Unusual file upload patterns
- Requests with ../ sequences in file paths
- Uploads of suspicious file types (.php, .jsp, .aspx)
Network Indicators:
- HTTP POST requests to upload endpoints without authentication
- Traffic patterns showing file uploads to non-standard directories
SIEM Query:
source="web_logs" AND (uri="*upload*" OR uri="*file*" OR method="POST") AND (uri="*../*" OR user_agent="*curl*" OR user_agent="*wget*")