CVE-2024-33516
📋 TL;DR
An unauthenticated Denial of Service (DoS) vulnerability exists in the Auth service accessed via the PAPI protocol in ArubaOS. This allows attackers to disrupt controller operations without requiring authentication. Organizations using affected Aruba networking equipment are impacted.
💻 Affected Systems
- Aruba Mobility Controllers
- ArubaOS
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of the Aruba controller, causing network downtime for all connected wireless access points and clients.
Likely Case
Temporary service interruption requiring controller reboot, disrupting wireless network availability.
If Mitigated
Minimal impact if controllers are behind firewalls with restricted PAPI protocol access.
🎯 Exploit Status
Unauthenticated exploitation via PAPI protocol makes this easily exploitable by attackers with network access to the controller.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ArubaOS 10.5.1.0, 10.4.2.0, 10.3.3.0, 8.11.2.1, 8.10.0.10, 8.9.0.12, 8.8.0.14, 8.7.1.18, 8.6.0.27
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2024-004.txt
Restart Required: Yes
Instructions:
1. Download appropriate patched version from Aruba Support Portal. 2. Backup controller configuration. 3. Upload and install new firmware. 4. Reboot controller. 5. Verify version and functionality.
🔧 Temporary Workarounds
Restrict PAPI Protocol Access
allLimit network access to PAPI protocol (UDP port 8211) to trusted management networks only.
Configure firewall rules to restrict UDP/8211 to management IPs only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate controllers from untrusted networks
- Monitor for unusual PAPI protocol traffic and implement rate limiting where possible
🔍 How to Verify
Check if Vulnerable:
Check ArubaOS version via controller CLI: 'show version' and compare against affected versions list.Check Version:
show versionVerify Fix Applied:
Verify installed version matches patched versions listed in advisory and test Auth service functionality.📡 Detection & Monitoring
Log Indicators:
- Multiple failed Auth service requests
- Controller service restart logs
- Unusual PAPI protocol traffic patterns
Network Indicators:
- High volume of UDP/8211 traffic to controller
- Unusual source IPs accessing PAPI port
SIEM Query:
source_port:8211 AND (event_count > threshold OR dest_ip:controller_ip)