CVE-2021-25163
📋 TL;DR
This CVE describes an XML External Entity (XXE) vulnerability in Aruba AirWave Management Platform that allows remote attackers to read arbitrary files on the system or conduct server-side request forgery attacks. It affects organizations running AirWave Management Platform versions prior to 8.2.12.1. The vulnerability can be exploited remotely without authentication.
💻 Affected Systems
- Aruba AirWave Management Platform
📦 What is this software?
Airwave by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise including sensitive data exfiltration, credential theft, and potential lateral movement within the network.
Likely Case
Unauthorized file system access leading to configuration file disclosure, credential harvesting, and potential privilege escalation.
If Mitigated
Limited impact with proper network segmentation and access controls, though file disclosure may still occur.
🎯 Exploit Status
XXE vulnerabilities are well-understood with readily available exploitation tools and techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.2.12.1 and later
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-010.txt
Restart Required: Yes
Instructions:
1. Download AirWave Management Platform version 8.2.12.1 or later from Aruba support portal. 2. Backup current configuration and data. 3. Apply the patch following Aruba's upgrade documentation. 4. Restart the AirWave Management Platform service.
🔧 Temporary Workarounds
Disable XML external entity processing
allConfigure XML parsers to disable external entity resolution
Specific configuration depends on XML parser implementation - consult Aruba documentation
Network segmentation and access control
allRestrict network access to AirWave Management Platform to trusted sources only
firewall rules to limit inbound connections to AirWave interface
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to AirWave Management Platform
- Monitor for unusual file access patterns and XML parsing errors in logs
🔍 How to Verify
Check if Vulnerable:
Check AirWave Management Platform version via web interface or CLI. Versions below 8.2.12.1 are vulnerable.Check Version:
From AirWave CLI: show version or check web interface System > AboutVerify Fix Applied:
Confirm version is 8.2.12.1 or higher and test XML parsing functionality for XXE vulnerabilities.📡 Detection & Monitoring
Log Indicators:
- Unusual XML parsing errors
- File access patterns outside normal operations
- Large XML payloads in requests
Network Indicators:
- HTTP requests with XML content containing external entity references
- Outbound connections from AirWave to unexpected destinations
SIEM Query:
source="airwave" AND (xml OR xxe OR "external entity")