CVE-2024-42398
📋 TL;DR
Multiple unauthenticated Denial-of-Service vulnerabilities exist in the Soft AP daemon accessed via the PAPI protocol. Attackers can exploit these vulnerabilities to disrupt normal Access Point operations without requiring authentication. This affects systems running vulnerable versions of HPE Aruba Networking products with Soft AP functionality.
💻 Affected Systems
- HPE Aruba Networking Access Points with Soft AP functionality
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of affected Access Points, rendering wireless networks unavailable until manual intervention or system restart.
Likely Case
Temporary service interruption causing network connectivity loss for connected clients, requiring AP reboot to restore functionality.
If Mitigated
Limited impact with proper network segmentation and access controls preventing unauthorized PAPI protocol access.
🎯 Exploit Status
Unauthenticated exploitation via PAPI protocol makes this relatively easy to exploit by attackers with network access to the vulnerable service.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to HPE security bulletin for specific patched versions
Vendor Advisory: https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw04678en_us&docLocale=en_US
Restart Required: Yes
Instructions:
1. Review HPE security bulletin for affected versions. 2. Download and apply the recommended firmware update from HPE support portal. 3. Reboot affected Access Points to apply the patch.
🔧 Temporary Workarounds
Restrict PAPI Protocol Access
linuxImplement firewall rules to restrict access to PAPI protocol ports from untrusted networks
# Example iptables rule: iptables -A INPUT -p tcp --dport <PAPI_PORT> -s <TRUSTED_NETWORK> -j ACCEPT
# iptables -A INPUT -p tcp --dport <PAPI_PORT> -j DROP
Disable Soft AP if Unused
allDisable Soft AP functionality if not required for your deployment
# Configuration command depends on specific ArubaOS version and deployment
# Consult Aruba documentation for disabling Soft AP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate AP management interfaces from untrusted networks
- Deploy intrusion prevention systems (IPS) with rules to detect and block PAPI protocol abuse patterns
🔍 How to Verify
Check if Vulnerable:
Check ArubaOS version against HPE security bulletin; verify if Soft AP daemon is running and PAPI protocol is accessibleCheck Version:
# show version (Aruba CLI command to check current firmware version)Verify Fix Applied:
Verify ArubaOS version is updated to patched version; test PAPI protocol access attempts do not cause service disruption📡 Detection & Monitoring
Log Indicators:
- Multiple connection attempts to PAPI port from single source
- Soft AP daemon crash or restart logs
- Unusual PAPI protocol traffic patterns
Network Indicators:
- High volume of traffic to AP management interface on PAPI ports
- Multiple TCP RST packets from AP after PAPI connections
SIEM Query:
source_ip="*" AND dest_port="<PAPI_PORT>" AND protocol="TCP" AND event_count>10 WITHIN 60s