CVE-2024-11313
📋 TL;DR
CVE-2024-11313 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 uploads. Organizations using 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 with attacker gaining full control over the server, data exfiltration, ransomware deployment, and lateral movement to other systems.
Likely Case
Attackers upload webshells to gain persistent access, execute arbitrary commands, and potentially deploy malware or cryptocurrency miners.
If Mitigated
With proper network segmentation and file upload restrictions, impact limited to isolated system compromise without lateral movement.
🎯 Exploit Status
The vulnerability requires no authentication and has straightforward exploitation path via file upload manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-8251-3455e-2.html
Restart Required: Yes
Instructions:
1. Check current TRCore DVC version
2. Download and apply vendor patch from official source
3. Restart DVC service
4. Verify patch application
🔧 Temporary Workarounds
Restrict File Upload Types
allConfigure DVC to only accept specific safe file extensions and validate file content
# Configure in DVC settings to whitelist allowed file types only
Implement Web Application Firewall Rules
allBlock path traversal patterns and suspicious file upload requests
# WAF rule to block requests containing '../' or similar traversal patterns
🧯 If You Can't Patch
- Isolate the DVC system from internet access and restrict to internal network only
- Implement strict network segmentation and monitor all file upload activities
🔍 How to Verify
Check if Vulnerable:
Check if DVC version is unpatched and allows unrestricted file uploads to arbitrary directoriesCheck Version:
# Check DVC version through admin interface or configuration filesVerify Fix Applied:
Test that file uploads with path traversal payloads are rejected and only allowed file types are accepted📡 Detection & Monitoring
Log Indicators:
- Unusual file upload patterns
- Requests containing '../' or directory traversal sequences
- Uploads of executable files or webshells
Network Indicators:
- HTTP POST requests to file upload endpoints with suspicious filenames
- Unusual outbound connections from DVC server
SIEM Query:
source="dvc_logs" AND (http_method="POST" AND uri="*upload*" AND (filename="*..*" OR filename="*.php" OR filename="*.jsp" OR filename="*.asp"))