CVE-2021-37716
📋 TL;DR
A remote buffer overflow vulnerability in Aruba SD-WAN Software and Gateways allows attackers to execute arbitrary code or cause denial of service. Affected systems include ArubaOS versions prior to specific patched releases. This vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- Aruba SD-WAN Software
- Aruba Gateways
- Aruba Operating System Software
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Sd Wan by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Denial of service causing network disruption and potential data corruption.
If Mitigated
Limited impact with proper network segmentation and intrusion prevention systems in place.
🎯 Exploit Status
Buffer overflow vulnerabilities typically have low exploitation complexity, especially when remote and unauthenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.6.0.4-2.2.0.4, 8.7.1.2, 8.6.0.8, 8.5.0.12, 8.3.0.15 or later
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-016.txt
Restart Required: Yes
Instructions:
1. Download appropriate patch from Aruba support portal. 2. Backup current configuration. 3. Apply patch following Aruba's upgrade procedures. 4. Reboot device. 5. Verify successful upgrade.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to affected devices using firewall rules and network segmentation.
Intrusion Prevention
allDeploy IPS/IDS systems to detect and block exploitation attempts.
🧯 If You Can't Patch
- Isolate affected devices from internet and untrusted networks
- Implement strict access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check ArubaOS version via CLI: 'show version' and compare against affected versions.Check Version:
show versionVerify Fix Applied:
Verify version is at or above patched versions: 8.6.0.4-2.2.0.4, 8.7.1.2, 8.6.0.8, 8.5.0.12, or 8.3.0.15.📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes
- Memory access violations
- Unusual network traffic to management interfaces
Network Indicators:
- Traffic patterns matching buffer overflow exploitation
- Unexpected connections to device management ports
SIEM Query:
source="aruba_device" AND (event_type="crash" OR event_type="memory_violation")