CVE-2021-37724
📋 TL;DR
This CVE allows remote attackers to execute arbitrary commands on ArubaOS network devices without authentication. It affects ArubaOS versions prior to 8.7.1.2, 8.6.0.8, 8.5.0.12, and 8.3.0.16. Network administrators using vulnerable Aruba switches, controllers, and gateways are at risk.
💻 Affected Systems
- ArubaOS
- Aruba switches
- Aruba controllers
- Aruba gateways
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of network infrastructure, lateral movement to other systems, data exfiltration, and persistent backdoor installation.
Likely Case
Unauthorized network access, configuration changes, service disruption, and credential theft from network devices.
If Mitigated
Limited impact if devices are behind firewalls with strict access controls and network segmentation.
🎯 Exploit Status
The vulnerability allows command injection without authentication, making exploitation straightforward for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.7.1.2, 8.6.0.8, 8.5.0.12, 8.3.0.16 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 ArubaOS upgrade procedures. 4. Reboot device. 5. Verify patch installation and functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict management interface access to trusted IP addresses only
configure terminal
ip access-list standard MANAGEMENT-ACL
permit host [TRUSTED_IP]
deny any
interface vlan [MANAGEMENT_VLAN]
ip access-group MANAGEMENT-ACL in
Disable Unnecessary Services
allDisable any unnecessary management services on vulnerable interfaces
configure terminal
no ip http server
no ip http secure-server
no service telnet
🧯 If You Can't Patch
- Isolate vulnerable devices in separate VLAN with strict firewall rules
- Implement network segmentation to limit lateral movement from compromised devices
🔍 How to Verify
Check if Vulnerable:
Check ArubaOS version with 'show version' command and compare against patched versionsCheck Version:
show version | include VersionVerify Fix Applied:
Verify version is 8.7.1.2, 8.6.0.8, 8.5.0.12, 8.3.0.16 or later using 'show version'📡 Detection & Monitoring
Log Indicators:
- Unexpected command execution in system logs
- Unauthorized configuration changes
- Unusual authentication attempts to management interfaces
Network Indicators:
- Unexpected outbound connections from network devices
- Anomalous traffic patterns from management interfaces
SIEM Query:
source="aruba_device" AND (event_type="command_execution" OR event_type="configuration_change") AND user="unknown"