CVE-2021-37130
📋 TL;DR
This path traversal vulnerability in Huawei FusionCube allows attackers to access files outside restricted directories by manipulating filenames. It affects Huawei FusionCube 6.0.2 installations where the vulnerable component is exposed. Attackers could potentially read sensitive system files or configuration data.
💻 Affected Systems
- Huawei FusionCube
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive configuration files, credentials, or system files that could lead to further exploitation.
Likely Case
Unauthorized access to sensitive files containing configuration data, logs, or potentially credentials stored in accessible directories.
If Mitigated
Limited impact with proper network segmentation, file system permissions, and input validation controls in place.
🎯 Exploit Status
Path traversal vulnerabilities typically have low exploitation complexity, but specific exploit details are not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version beyond 6.0.2 (consult Huawei for specific patched version)
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20211020-01-pathtraversal-en
Restart Required: Yes
Instructions:
1. Download the security patch from Huawei support portal. 2. Apply the patch following Huawei's official documentation. 3. Restart affected services or the entire system as required. 4. Verify the patch was successfully applied.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation to reject path traversal sequences like '../' in filenames
# Requires application-level code changes; no direct command
File System Permissions Hardening
linuxRestrict file system permissions to limit what directories the vulnerable service can access
chmod 750 /restricted/directories
chown root:servicegroup /restricted/directories
🧯 If You Can't Patch
- Implement network segmentation to isolate FusionCube from untrusted networks
- Deploy web application firewall (WAF) with path traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Check Huawei FusionCube version: cat /etc/huawei-release or equivalent version fileCheck Version:
cat /etc/huawei-release 2>/dev/null || huawei-version-checkVerify Fix Applied:
Verify version is updated beyond 6.0.2 and test path traversal attempts are blocked📡 Detection & Monitoring
Log Indicators:
- Multiple failed file access attempts with '../' sequences
- Unusual file access patterns from single source
Network Indicators:
- HTTP requests containing '../' sequences in filenames or parameters
SIEM Query:
source="fusioncube_logs" AND ("../" OR "..\" OR "%2e%2e%2f")