CVE-2023-35982
📋 TL;DR
This critical vulnerability allows unauthenticated attackers to execute arbitrary code with privileged access on Aruba access points by sending specially crafted packets to UDP port 8211. It affects Aruba access points running vulnerable versions of the PAPI management protocol. Organizations using affected Aruba wireless infrastructure are at risk.
💻 Affected Systems
- Aruba Access Points
📦 What is this software?
Arubaos by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of affected access points leading to network infiltration, data exfiltration, lateral movement, and persistent backdoor installation across the wireless infrastructure.
Likely Case
Attackers gain privileged access to access points, potentially disrupting wireless services, intercepting traffic, and using compromised devices as footholds for further network attacks.
If Mitigated
If properly segmented and monitored, impact limited to isolated wireless segments with minimal data exposure and quick containment.
🎯 Exploit Status
Buffer overflow in PAPI protocol allows unauthenticated RCE. Attack complexity is low due to default vulnerable configuration and network accessibility.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to ARUBA-PSA-2023-009 for specific patched versions
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2023-009.txt
Restart Required: Yes
Instructions:
1. Review ARUBA-PSA-2023-009 advisory. 2. Identify affected AP models and versions. 3. Download appropriate firmware updates from Aruba support portal. 4. Apply updates following Aruba's upgrade procedures. 5. Reboot affected access points.
🔧 Temporary Workarounds
Block PAPI Port at Network Perimeter
allBlock UDP port 8211 at firewalls to prevent external exploitation
iptables -A INPUT -p udp --dport 8211 -j DROP
netsh advfirewall firewall add rule name="Block Aruba PAPI" dir=in action=block protocol=UDP localport=8211
Restrict PAPI Access with ACLs
allConfigure access control lists to limit PAPI access to trusted management stations only
# Configure on Aruba controller or AP CLI: access-list papi-permit permit ip <trusted-mgmt-ip> any
# Apply ACL to PAPI service
🧯 If You Can't Patch
- Segment wireless network from critical infrastructure using VLANs and firewall rules
- Implement strict network monitoring for anomalous traffic to UDP port 8211
🔍 How to Verify
Check if Vulnerable:
Check ArubaOS version against vulnerable versions listed in ARUBA-PSA-2023-009. Verify PAPI service is running on UDP 8211.Check Version:
show version (on Aruba AP CLI)Verify Fix Applied:
Confirm ArubaOS version is updated to patched release specified in advisory. Verify system stability post-update.📡 Detection & Monitoring
Log Indicators:
- Multiple connection attempts to UDP port 8211
- Unexpected process creation or privilege escalation on APs
- System crash or reboot logs from access points
Network Indicators:
- Unusual traffic patterns to UDP port 8211 from untrusted sources
- Large or malformed packets to port 8211
- Unexpected outbound connections from APs post-exploit
SIEM Query:
source_port=8211 OR dest_port=8211 protocol=UDP | stats count by src_ip, dest_ip