CVE-2024-11309
📋 TL;DR
CVE-2024-11309 is a path traversal vulnerability in DVC from TRCore that allows unauthenticated remote attackers to read arbitrary system files. This affects systems running vulnerable versions of DVC software, potentially exposing sensitive configuration files, credentials, or other critical system data to unauthorized access.
💻 Affected Systems
- DVC from TRCore
📦 What is this software?
Dvc by Trcore
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive system files including configuration files, password files, SSH keys, database credentials, and other critical data, potentially leading to full system compromise.
Likely Case
Attackers will read accessible system files to gather information for further attacks, potentially obtaining credentials or configuration data that enables lateral movement or privilege escalation.
If Mitigated
With proper network segmentation and access controls, impact is limited to files accessible by the DVC process, though sensitive data exposure remains possible.
🎯 Exploit Status
Path traversal vulnerabilities are typically easy to exploit with simple HTTP requests containing directory traversal sequences.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-8243-3d818-2.html
Restart Required: Yes
Instructions:
1. Check vendor advisory for specific patch version. 2. Apply vendor-provided patch or update to fixed version. 3. Restart DVC service. 4. Verify fix implementation.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to DVC service to trusted IP addresses only
iptables -A INPUT -p tcp --dport [DVC_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [DVC_PORT] -j DROP
Application Firewall Rules
allBlock requests containing path traversal sequences
Modify web server or application firewall to reject requests containing '../', '..\\', or similar traversal patterns
🧯 If You Can't Patch
- Implement strict network segmentation to isolate DVC systems from untrusted networks
- Deploy web application firewall with path traversal detection rules
🔍 How to Verify
Check if Vulnerable:
Test by attempting to access system files via DVC interface using path traversal sequences (e.g., ../../etc/passwd)Check Version:
Check DVC version via vendor-specific command or configuration fileVerify Fix Applied:
Retest path traversal attempts after patch application; successful attempts should return access denied errors📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../' or '..\\' sequences
- Unusual file access patterns from DVC process
- Failed file access attempts to system directories
Network Indicators:
- HTTP requests with encoded path traversal sequences (%2e%2e%2f)
- Multiple sequential requests attempting different file paths
SIEM Query:
source="dvc_logs" AND (uri="*../*" OR uri="*..\\*" OR uri="*%2e%2e%2f*")