CVE-2024-31466: Arubanetworks ArubaOS RCE Vulnerability

CVE-2024-31466 Overview

CVE-2024-31466 is a critical buffer overflow vulnerability affecting the underlying CLI service in Aruba Networks ArubaOS and HP InstantOS. This vulnerability enables unauthenticated remote code execution by sending specially crafted packets to the PAPI (Aruba's Access Point management protocol) UDP port 8211. Successful exploitation allows an attacker to execute arbitrary code with privileged user permissions 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 access points and controllers by exploiting buffer overflow conditions in the PAPI CLI service.

Affected Products

• Aruba Networks ArubaOS
• HP InstantOS

Discovery Timeline

• 2024-05-14 - CVE-2024-31466 published to NVD
• 2025-06-24 - Last updated in NVD database

Technical Details for CVE-2024-31466

Vulnerability Analysis

CVE-2024-31466 represents a stack-based buffer overflow vulnerability (CWE-121) within the CLI service component that processes PAPI protocol messages. The vulnerability exists in how the service handles incoming packets on UDP port 8211, where insufficient bounds checking allows attackers to overwrite stack memory with attacker-controlled data.

The PAPI protocol is Aruba's proprietary Access Point management protocol used for communication between access points and controllers. When the CLI service receives a malformed packet with an oversized payload, the buffer overflow condition occurs, enabling attackers to corrupt adjacent stack memory including return addresses and saved registers.

This vulnerability requires no authentication, meaning any network-adjacent attacker capable of sending UDP packets to port 8211 can attempt exploitation. The attack complexity is low and requires no user interaction, making this an attractive target for automated exploitation.

Root Cause

The root cause is a stack-based buffer overflow (CWE-121) in the CLI service's packet parsing routines. When processing PAPI protocol messages, the service copies user-supplied data into a fixed-size stack buffer without proper length validation. This allows an attacker to supply input exceeding the buffer boundaries, overwriting adjacent stack memory and potentially gaining control of program execution flow.

Attack Vector

The attack is executed over the network by sending specially crafted UDP packets to port 8211, which hosts the PAPI management protocol service. The attack flow involves:

1. An attacker identifies an accessible Aruba access point or controller with UDP port 8211 exposed
2. The attacker crafts a malicious PAPI protocol packet containing an oversized payload designed to overflow the vulnerable buffer
3. The packet is sent to the target system's PAPI service
4. The CLI service processes the packet and copies the malicious payload into a stack buffer without bounds checking
5. The overflow corrupts adjacent stack memory, allowing the attacker to hijack execution flow
6. The attacker achieves arbitrary code execution with the privileges of the CLI service (privileged user)

Due to the network-based attack vector and lack of authentication requirements, exploitation can be performed by any attacker with network access to the target device.

Detection Methods for CVE-2024-31466

Indicators of Compromise

• Unusual or malformed UDP traffic patterns targeting port 8211 on Aruba access points and controllers
• Unexpected process crashes or service restarts of the CLI service component
• Anomalous network connections initiated from access point devices to external systems
• Evidence of unauthorized commands executed on access point infrastructure
• Memory corruption artifacts in system logs or crash dumps

Detection Strategies

• Deploy network intrusion detection rules to monitor for anomalous UDP traffic to port 8211 with unusual payload sizes
• Implement SIEM correlation rules to detect patterns of rapid connection attempts to PAPI services
• Monitor system logs on Aruba devices for CLI service crashes or unexpected restarts
• Use network segmentation monitoring to detect unauthorized access to management protocol ports

Monitoring Recommendations

• Enable detailed logging on Aruba access points and controllers for the CLI service component
• Implement network traffic analysis to baseline normal PAPI protocol behavior and alert on deviations
• Configure alerting for any unexpected outbound connections from access point infrastructure
• Monitor for firmware integrity changes or unauthorized configuration modifications

How to Mitigate CVE-2024-31466

Immediate Actions Required

• Apply vendor-provided security patches immediately as outlined in the Aruba Networks Security Advisory
• Restrict network access to UDP port 8211 using firewall rules to allow only trusted management systems
• Implement network segmentation to isolate access point management traffic from untrusted networks
• Monitor for exploitation attempts using network intrusion detection systems
• Review the HPE Security Bulletin for additional guidance

Patch Information

Aruba Networks has released security updates to address this vulnerability. Administrators should consult the official Aruba Networks PSA-2024-006 Security Advisory for specific patch versions and upgrade instructions. HP InstantOS users should reference the HPE Security Bulletin for applicable firmware updates.

Workarounds

• Block UDP port 8211 at network perimeters and restrict access to trusted management networks only
• Implement strict access control lists (ACLs) on network devices to prevent unauthorized access to PAPI protocol
• Consider disabling the PAPI protocol if not required for your deployment until patches can be applied
• Deploy network monitoring to detect and alert on any attempts to access port 8211 from unauthorized sources

# Example firewall rule to restrict PAPI protocol access
# Allow only trusted management subnet to access UDP port 8211
iptables -A INPUT -p udp --dport 8211 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p udp --dport 8211 -j DROP