CVE-2024-1593
📋 TL;DR
A path traversal vulnerability in MLflow allows attackers to use ';' characters in URL parameters to access unauthorized files or directories. This affects MLflow deployments where the vulnerable code handles URL parameters, potentially exposing sensitive data or enabling server compromise.
💻 Affected Systems
- MLflow
📦 What is this software?
Mlflow by Lfprojects
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through arbitrary file read/write leading to remote code execution.
Likely Case
Unauthorized access to sensitive configuration files, source code, or credentials stored on the server.
If Mitigated
Limited impact if proper input validation and file system permissions restrict access to critical areas.
🎯 Exploit Status
Exploitation requires crafting URLs with ';' characters in parameters to perform path traversal.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check MLflow GitHub repository for latest security patches
Vendor Advisory: https://github.com/mlflow/mlflow/security/advisories
Restart Required: Yes
Instructions:
1. Update MLflow to latest patched version. 2. Restart MLflow services. 3. Verify the fix by testing with malicious URLs.
🔧 Temporary Workarounds
Input Validation Filter
allImplement middleware or proxy to filter URLs containing ';' characters in parameters
# Example for nginx: location / { if ($args ~* ";") { return 403; } }
File System Restrictions
linuxConfigure MLflow to run with minimal file system permissions
# Run as non-root user
# chroot or containerize MLflow deployment
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block URLs with ';' characters in parameters
- Restrict network access to MLflow instances using firewall rules
🔍 How to Verify
Check if Vulnerable:
Test by accessing MLflow with URLs containing ';../' sequences in parameters and observing if unauthorized file access occurs.Check Version:
mlflow --versionVerify Fix Applied:
Attempt the same test after patching; successful requests should be blocked or return appropriate errors.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with ';' characters in URL parameters
- Unusual file access patterns from MLflow processes
Network Indicators:
- HTTP traffic to MLflow with encoded ';' characters (%3B) in URLs
SIEM Query:
source="mlflow.log" AND (url="*;*" OR url="*%3B*")