CVE-2024-33518: ArubaOS Radio Frequency Manager DoS Flaw

CVE-2024-33518 Overview

CVE-2024-33518 is an unauthenticated denial-of-service (DoS) vulnerability in the Radio Frequency Manager service of HPE Aruba Networking ArubaOS. The flaw is reachable over the network through the Process Application Programming Interface (PAPI) protocol. A remote attacker can send crafted PAPI traffic to disrupt the normal operation of the affected service without authentication or user interaction. The weakness is classified under [CWE-121] Stack-based Buffer Overflow. Exploitation impacts availability only, with no direct effect on confidentiality or integrity of data handled by ArubaOS.

Critical Impact
Unauthenticated remote attackers can interrupt the Radio Frequency Manager service on affected ArubaOS controllers, degrading wireless network operations.

Affected Products

HPE Aruba Networking ArubaOS (Mobility Conductor and Mobility Controllers)
ArubaOS-managed WLAN Gateways
ArubaOS-managed SD-WAN Gateways

Discovery Timeline

2024-05-01 - CVE-2024-33518 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-33518

Vulnerability Analysis

The vulnerability resides in the Radio Frequency Manager (RF Manager) service on ArubaOS devices. RF Manager is responsible for coordinating radio resource management functions across managed access points and controllers. Communication with the service occurs through the PAPI protocol, Aruba's proprietary management channel used between wireless infrastructure components. A remote attacker who can reach the PAPI service on the network can transmit a crafted request that triggers a stack-based memory corruption condition inside the RF Manager process. Successful exploitation halts or restarts the service, producing a denial-of-service condition against wireless management functions. Because the flaw is exposed over the network and requires no privileges or user interaction, the attack complexity is low.

Root Cause

The underlying weakness is a stack-based buffer overflow tracked as [CWE-121]. The RF Manager service does not correctly validate the size of attacker-controlled input received through PAPI before copying it into a fixed-size stack buffer. This oversized copy corrupts adjacent stack memory and destabilizes the process. In the confirmed impact scenario, the corruption leads to a service crash rather than reliable code execution.

Attack Vector

Exploitation is performed remotely over the network by sending crafted PAPI protocol packets to a reachable ArubaOS interface. No credentials or user interaction are required. Devices with PAPI exposed to untrusted networks, such as management interfaces reachable outside a trusted segment, present the highest exposure. Refer to the Aruba Networks Security Alert for the definitive list of affected versions and PAPI exposure guidance.

Detection Methods for CVE-2024-33518

Indicators of Compromise

Unexpected restarts or crash logs of the Radio Frequency Manager process on ArubaOS controllers.
Loss of RF management telemetry or gaps in access point coordination events.
Inbound PAPI traffic (UDP/8211) originating from untrusted or unexpected source addresses.

Detection Strategies

Monitor ArubaOS syslog output for RF Manager service faults, coredumps, or watchdog restarts.
Inspect network flow records for PAPI traffic reaching controllers from outside the management VLAN.
Correlate wireless service outages with concurrent spikes in PAPI packet volume or malformed PAPI messages.

Monitoring Recommendations

Forward ArubaOS logs to a centralized analytics platform and alert on repeated RF Manager crashes.
Baseline normal PAPI source addresses so anomalous senders can be flagged automatically.
Track availability metrics for wireless services to identify service disruption patterns tied to exploitation attempts.

How to Mitigate CVE-2024-33518

Immediate Actions Required

Apply the fixed ArubaOS versions listed in ARUBA-PSA-2024-004 to all Mobility Conductors, Mobility Controllers, and managed gateways.
Restrict PAPI protocol traffic to trusted management segments using access control lists and firewall policy.
Audit management interfaces for unnecessary network exposure and remove public reachability.

Patch Information

Hewlett Packard Enterprise (HPE) Aruba Networking published fixed ArubaOS builds in security advisory ARUBA-PSA-2024-004. Administrators should consult the vendor advisory for the specific fixed versions that correspond to their deployed ArubaOS train and upgrade accordingly.

Workarounds

Enable the ArubaOS Enhanced PAPI Security feature to require cluster-wide authentication of PAPI messages where supported.
Block UDP port 8211 at perimeter and inter-VLAN boundaries so only authorized controllers and access points can reach the service.
Segment management traffic onto a dedicated out-of-band network isolated from user and guest VLANs.

bash

# Configuration example: restrict PAPI (UDP/8211) to trusted management hosts
# Applied on an upstream firewall or ArubaOS CPsec policy
ip access-list session restrict-papi
  user host <trusted-controller-ip> any udp 8211 permit
  user any any udp 8211 deny
  user any any any permit