CVE-2025-31174
📋 TL;DR
A path traversal vulnerability in the DFS module allows attackers to access files outside the intended directory. This affects Huawei products using the vulnerable DFS module, potentially exposing sensitive data.
💻 Affected Systems
- Huawei products with DFS module
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive system files, configuration files, or user data, leading to complete data exposure and potential credential theft.
Likely Case
Unauthorized access to files in adjacent directories, potentially exposing configuration files or limited sensitive data.
If Mitigated
With proper access controls and file system permissions, impact is limited to files the service account can already access.
🎯 Exploit Status
Path traversal typically requires some level of access to the service
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific fixed versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/4/
Restart Required: Yes
Instructions:
1. Review Huawei security bulletin for affected products. 2. Download and apply the security patch from Huawei. 3. Restart affected services. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Restrict file system access
linuxApply strict file system permissions to limit what the DFS service can access
chmod 750 /path/to/dfs/directory
chown root:dfsgroup /path/to/dfs/directory
Network segmentation
allIsolate DFS services from untrusted networks
🧯 If You Can't Patch
- Implement strict access controls and file system permissions
- Monitor for unusual file access patterns and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check Huawei security bulletin for your specific product and versionCheck Version:
Product-specific command - check product documentationVerify Fix Applied:
Verify the installed version matches or exceeds the patched version in the advisory📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns
- Access attempts to files outside expected directories
- Failed file access with path traversal patterns
Network Indicators:
- Unusual network traffic to DFS services
- Requests containing path traversal patterns (../, ..\)
SIEM Query:
source="dfs_logs" AND (path="*../*" OR path="*..\*")