CVE-2020-9114
📋 TL;DR
This CVE-2020-9114 is a privilege escalation vulnerability in Huawei FusionCompute virtualization software. Attackers with common user privileges can access specific files to gain administrator privileges. This affects FusionCompute versions 6.3.0 through 8.0.0.
💻 Affected Systems
- Huawei FusionCompute
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain full administrative control over the FusionCompute environment, potentially accessing all virtual machines and management functions.
Likely Case
Unauthorized administrative access leading to data theft, service disruption, or deployment of malicious virtual machines.
If Mitigated
Limited impact if proper network segmentation and access controls prevent unauthorized users from reaching the vulnerable interface.
🎯 Exploit Status
Requires authenticated access but specific exploit details are not publicly documented. Based on CWE-269 (Improper Privilege Management).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to versions beyond affected releases (consult Huawei advisory for specific fixed versions)
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20201118-01-privilege-en
Restart Required: Yes
Instructions:
1. Check current FusionCompute version. 2. Download appropriate patch from Huawei support portal. 3. Apply patch following Huawei's upgrade procedures. 4. Restart affected services or systems as required.
🔧 Temporary Workarounds
Restrict Access to Management Interface
linuxLimit network access to FusionCompute management interface to authorized administrators only.
# Configure firewall rules to restrict access
# Example: iptables -A INPUT -s <trusted_network> -p tcp --dport <management_port> -j ACCEPT
# iptables -A INPUT -p tcp --dport <management_port> -j DROP
Implement Least Privilege Access
allReview and minimize user accounts with access to FusionCompute, ensuring only necessary users have any level of access.
# Review user accounts and permissions
# Remove unnecessary accounts
# Implement role-based access controls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate FusionCompute management network
- Enable detailed logging and monitoring for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check FusionCompute version via web interface or CLI. If version is 6.3.0, 6.3.1, 6.5.0, 6.5.1, or 8.0.0, system is vulnerable.Check Version:
Login to FusionCompute web interface and check version in system information, or use CLI command specific to Huawei platformVerify Fix Applied:
Verify version has been updated to a patched release beyond affected versions. Check Huawei advisory for specific fixed version numbers.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns by non-admin users
- Multiple failed privilege escalation attempts followed by success
- User accounts accessing administrative functions unexpectedly
Network Indicators:
- Unusual connections to management interface from non-admin workstations
- Traffic patterns suggesting file enumeration
SIEM Query:
source="fusioncompute" AND (event_type="file_access" OR event_type="privilege_change") AND user!="admin"