CVE-2025-30387
📋 TL;DR
This path traversal vulnerability in Azure allows unauthorized attackers to access restricted directories and elevate privileges over a network. It affects Azure services configured with vulnerable path handling. Organizations using affected Azure services are at risk.
💻 Affected Systems
- Microsoft Azure services with path traversal vulnerability
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, data exfiltration, and lateral movement across the Azure environment.
Likely Case
Unauthorized file access, privilege escalation to execute arbitrary code, and potential data breach.
If Mitigated
Limited impact with proper network segmentation, least privilege access controls, and monitoring in place.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network access and no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Azure security updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30387
Restart Required: No
Instructions:
1. Review Microsoft advisory 2. Apply Azure service updates 3. Verify patch deployment 4. Monitor for any issues
🔧 Temporary Workarounds
Network segmentation
allRestrict network access to Azure services using firewalls and network security groups
Input validation
allImplement strict input validation for file paths in custom applications
🧯 If You Can't Patch
- Implement strict network access controls and monitor for suspicious file access patterns
- Deploy web application firewall with path traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Check Azure service configurations and review Microsoft security advisory for affected servicesCheck Version:
Azure CLI: az version or check specific service versions in Azure portalVerify Fix Applied:
Verify Azure services are updated to latest versions and test path traversal attempts📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns
- Path traversal strings in request logs
- Failed authentication attempts with path manipulation
Network Indicators:
- Suspicious HTTP requests with ../ sequences
- Unexpected file access from unauthorized sources
SIEM Query:
Example: source="azure-logs" AND (uri CONTAINS "../" OR uri CONTAINS "..\")