CVE-2024-31470: Arubanetworks ArubaOS RCE Vulnerability

CVE-2024-31470 Overview

A buffer overflow vulnerability exists in the underlying SAE (Simultaneous Authentication of Equals) service of Aruba ArubaOS and HP InstantOS. This vulnerability allows unauthenticated remote code execution by sending specially crafted packets to the PAPI (Aruba's Access Point management protocol) UDP port (8211). Successful exploitation enables attackers to execute arbitrary code as a privileged user on the underlying operating system, potentially leading to complete system compromise.

Critical Impact

Unauthenticated attackers can achieve remote code execution with privileged access on affected Aruba network devices by exploiting the buffer overflow in the SAE service via UDP port 8211.

Affected Products

• Aruba Networks ArubaOS
• HP InstantOS

Discovery Timeline

• 2024-05-14 - CVE-2024-31470 published to NVD
• 2025-06-24 - Last updated in NVD database

Technical Details for CVE-2024-31470

Vulnerability Analysis

This vulnerability represents a stack-based buffer overflow (CWE-121) in the SAE service component of ArubaOS and InstantOS. The SAE protocol is part of WPA3 authentication and handles the Dragonfly key exchange. The vulnerable code fails to properly validate the length of incoming data before copying it into a fixed-size buffer on the stack.

The exploitation pathway is particularly dangerous because it requires no authentication and can be triggered remotely via the network. The PAPI protocol operates over UDP port 8211, which is commonly exposed on Aruba access points for management purposes. An attacker who can send crafted UDP packets to this port can overflow the buffer, overwrite return addresses or other critical stack data, and redirect execution to attacker-controlled code.

The impact of successful exploitation is severe: the attacker gains the ability to execute arbitrary code with privileged (root-level) permissions on the underlying operating system of the access point. This could allow for persistent backdoor installation, lateral movement within the network, traffic interception, or use of the compromised device as a pivot point for further attacks.

Root Cause

The root cause is improper bounds checking in the SAE service when processing PAPI protocol messages. Specifically, the code does not adequately validate the size of user-supplied data before copying it into a stack-allocated buffer, leading to a classic stack-based buffer overflow condition (CWE-121). This allows an attacker to write beyond the intended buffer boundaries and corrupt adjacent memory, including saved return addresses on the stack.

Attack Vector

The attack vector is network-based, requiring the attacker to send specially crafted UDP packets to port 8211 on a vulnerable Aruba access point. The attack requires:

1. Network accessibility to the target device's PAPI UDP port (8211)
2. Crafted packets containing malformed data designed to overflow the buffer in the SAE service
3. No authentication or user interaction is required

The attacker constructs malicious PAPI protocol packets with oversized fields that, when processed by the SAE service, overflow the stack buffer and allow control of program execution flow.

Detection Methods for CVE-2024-31470

Indicators of Compromise

• Unusual or malformed UDP traffic targeting port 8211 on Aruba access points
• Unexpected process crashes or restarts of the SAE service on access points
• Anomalous outbound network connections from access point devices
• Unauthorized configuration changes or new administrative accounts on network infrastructure

Detection Strategies

• Deploy network intrusion detection rules to identify malformed PAPI protocol traffic on UDP port 8211
• Monitor access point logs for unexpected service crashes, particularly involving the SAE authentication service
• Implement network segmentation to limit exposure of management protocols and detect unauthorized access attempts
• Use network traffic analysis to identify anomalous UDP packet sizes or patterns targeting access point management interfaces

Monitoring Recommendations

• Enable verbose logging on Aruba access points and centralize logs for security analysis
• Monitor for unexpected firmware or configuration changes on network infrastructure devices
• Implement alerts for unusual network traffic patterns originating from or destined to access point management ports
• Regularly audit network device configurations and compare against known-good baselines

How to Mitigate CVE-2024-31470

Immediate Actions Required

• Apply the latest security patches from Aruba Networks immediately for all affected ArubaOS and InstantOS devices
• Restrict network access to UDP port 8211 using firewall rules or access control lists to trusted management networks only
• Implement network segmentation to isolate access point management interfaces from general network traffic
• Monitor for exploitation attempts while planning and executing patch deployment

Patch Information

Aruba Networks has released security updates to address this vulnerability. Administrators should consult the Aruba Networks Security Alert (ARUBA-PSA-2024-006) for specific patch versions and upgrade instructions. Additional technical guidance is available from the HPE Support Document.

Workarounds

• Implement strict firewall rules to block external access to UDP port 8211 on all access points
• Use network access control to ensure only authorized management stations can communicate with access point management interfaces
• Consider disabling PAPI protocol access from untrusted network segments if operationally feasible
• Deploy intrusion prevention systems with signatures capable of detecting buffer overflow exploitation attempts

# Example: Restrict access to PAPI UDP port using iptables on upstream firewall
iptables -A INPUT -p udp --dport 8211 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p udp --dport 8211 -j DROP