CVE-2024-31473: Arubanetworks ArubaOS RCE Vulnerability

CVE-2024-31473 Overview

CVE-2024-31473 is a critical command injection vulnerability affecting the deauthentication service in Aruba Networks ArubaOS and HP InstantOS. The 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 compromise of affected access points and network infrastructure.

Critical Impact

Unauthenticated attackers can achieve remote code execution with privileged access on Aruba access points, enabling full system compromise without requiring any authentication.

Affected Products

• Aruba Networks ArubaOS
• HP InstantOS

Discovery Timeline

• 2024-05-14 - CVE-2024-31473 published to NVD
• 2025-06-24 - Last updated in NVD database

Technical Details for CVE-2024-31473

Vulnerability Analysis

This vulnerability is classified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS command injection. The flaw exists within the deauthentication service component of Aruba's access point firmware. When the service processes incoming packets on the PAPI UDP port 8211, it fails to properly sanitize user-supplied input before incorporating it into operating system commands.

The network-accessible nature of this vulnerability is particularly concerning as it requires no authentication, no user interaction, and has low attack complexity. An attacker positioned on the network with access to UDP port 8211 can craft malicious packets that, when processed by the vulnerable service, result in arbitrary command execution with elevated privileges on the access point's underlying operating system.

Root Cause

The root cause of this vulnerability is insufficient input validation in the deauthentication service. The service accepts data from PAPI protocol packets and incorporates this data into system commands without proper sanitization or escaping of special characters. This allows an attacker to inject additional commands or command modifiers that are then executed by the system with the privileges of the service process.

Attack Vector

The attack vector is network-based, targeting UDP port 8211 which hosts the PAPI management protocol. An attacker can exploit this vulnerability by:

1. Identifying Aruba access points with exposed PAPI ports on the network
2. Crafting malicious UDP packets containing command injection payloads
3. Sending these packets to port 8211 on the target access point
4. Achieving code execution as a privileged user when the deauthentication service processes the malicious input

The vulnerability requires no authentication, making it particularly dangerous in environments where UDP port 8211 is accessible from untrusted network segments or the internet.

Detection Methods for CVE-2024-31473

Indicators of Compromise

• Unusual UDP traffic patterns targeting port 8211 on Aruba access points
• Unexpected process spawning or command execution on access point devices
• Anomalous network connections originating from access point management interfaces
• Suspicious entries in access point system logs related to the deauthentication service

Detection Strategies

• Deploy network intrusion detection systems (NIDS) with signatures for PAPI protocol anomalies and command injection patterns
• Monitor UDP port 8211 traffic for malformed or suspicious packet structures
• Implement endpoint detection on network management systems to identify compromised access points
• Establish baseline behavior for access point communications and alert on deviations

Monitoring Recommendations

• Enable detailed logging on Aruba access points and centralize log collection
• Monitor for unexpected outbound connections from access point devices
• Track firmware versions across all access points to identify unpatched systems
• Implement network segmentation monitoring to detect lateral movement from compromised access points

How to Mitigate CVE-2024-31473

Immediate Actions Required

• Review the Aruba Networks Security Alert and apply vendor-recommended patches immediately
• Restrict network access to UDP port 8211 using firewall rules to limit exposure
• Isolate access point management interfaces on dedicated management VLANs
• Audit network for any unauthorized access to PAPI ports

Patch Information

Aruba Networks has released security patches addressing this vulnerability. Organizations should immediately consult the Aruba Networks Security Alert ARUBA-PSA-2024-006 for specific patch versions and update instructions. Additional technical guidance is available in the HPE Support Document.

Workarounds

• Implement strict network access controls to block external access to UDP port 8211
• Deploy access control lists (ACLs) to restrict PAPI protocol communication to trusted management stations only
• Consider disabling the PAPI protocol if not required for management operations
• Use network segmentation to isolate access point management traffic from untrusted network segments

# Example firewall rule to restrict PAPI port access
# Allow only trusted management network to access UDP port 8211
iptables -A INPUT -p udp --dport 8211 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p udp --dport 8211 -j DROP