CVE-2024-47460: Aruba Access Point PAPI RCE Vulnerability

CVE-2024-47460 Overview

CVE-2024-47460 is a critical command injection vulnerability affecting the underlying CLI service in Aruba Access Points. 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 an attacker 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 by exploiting the PAPI protocol on UDP port 8211, enabling complete takeover of affected Aruba Access Points.

Affected Products

• Aruba Access Points with PAPI protocol enabled
• Devices exposing UDP port 8211
• HPE Aruba Networking products (refer to HPE Support Document for specific versions)

Discovery Timeline

• 2024-11-05 - CVE-2024-47460 published to NVD
• 2024-11-06 - Last updated in NVD database

Technical Details for CVE-2024-47460

Vulnerability Analysis

This vulnerability is classified under CWE-77 (Improper Neutralization of Special Elements used in a Command - Command Injection). The flaw exists within the CLI service that processes PAPI protocol messages. Due to insufficient input validation, specially crafted packets can inject malicious commands that are executed with elevated privileges on the target system.

The attack can be initiated remotely over the network without requiring any authentication or user interaction, though the attack complexity is considered high. The scope of impact is changed, meaning successful exploitation can affect resources beyond the vulnerable component's security scope, potentially compromising the confidentiality, integrity, and availability of the entire system.

Root Cause

The root cause of this vulnerability is improper neutralization of special elements within the CLI service that handles PAPI protocol communications. When processing incoming UDP packets on port 8211, the service fails to adequately sanitize user-controlled input before incorporating it into system commands. This lack of input validation allows attackers to inject arbitrary shell commands that are subsequently executed by the underlying operating system.

Attack Vector

The attack is conducted over the network by sending maliciously crafted UDP packets to port 8211, which is used by the PAPI (Aruba's Access Point management protocol). The attacker does not require any prior authentication or user privileges to exploit this vulnerability.

The exploitation process involves:

1. Identifying an exposed Aruba Access Point with UDP port 8211 accessible
2. Crafting malicious PAPI protocol packets containing command injection payloads
3. Sending the crafted packets to the target device
4. The vulnerable CLI service processes the packet and executes the injected commands with privileged user permissions

Due to the network-based attack vector and lack of authentication requirements, any network-accessible Aruba Access Point running a vulnerable firmware version is at risk. Refer to the HPE Support Document for detailed exploitation indicators and mitigation guidance.

Detection Methods for CVE-2024-47460

Indicators of Compromise

• Unusual UDP traffic patterns targeting port 8211 from external or unauthorized sources
• Unexpected privileged process execution on Aruba Access Points
• Anomalous CLI service behavior or crash patterns
• Evidence of unauthorized command execution in system logs

Detection Strategies

• Implement network monitoring to detect suspicious UDP packets targeting port 8211
• Deploy intrusion detection/prevention systems (IDS/IPS) with signatures for PAPI protocol anomalies
• Monitor access point logs for unexpected CLI command execution or privilege escalation attempts
• Utilize SentinelOne Singularity platform for behavioral detection of post-exploitation activities

Monitoring Recommendations

• Establish baseline traffic patterns for PAPI protocol communications and alert on deviations
• Configure centralized logging for all Aruba Access Points to enable correlation analysis
• Implement network segmentation to limit exposure of management protocols like PAPI
• Deploy continuous monitoring for indicators of lateral movement following potential access point compromise

How to Mitigate CVE-2024-47460

Immediate Actions Required

• Review and apply patches from HPE Aruba as documented in the HPE Support Document
• Restrict network access to UDP port 8211 using firewall rules to allow only authorized management systems
• Implement network segmentation to isolate access point management interfaces from untrusted networks
• Audit all Aruba Access Points for signs of compromise before and after patching

Patch Information

HPE has released security updates to address this vulnerability. Organizations should consult the official HPE Support Document for specific patch versions and update procedures. Given the critical nature of this vulnerability and its potential for unauthenticated remote code execution, patching should be prioritized immediately.

Workarounds

• Block or restrict UDP port 8211 at network perimeter firewalls if PAPI protocol access from external networks is not required
• Implement access control lists (ACLs) to limit PAPI protocol communications to known, trusted management IP addresses only
• Enable enhanced logging on access points to capture detailed CLI service activity for forensic purposes
• Consider temporarily disabling the PAPI protocol if operationally feasible until patches can be applied

# Example: Firewall rule to restrict PAPI protocol access (adjust for your environment)
# Block external access to UDP port 8211 on Aruba Access Points
iptables -A INPUT -p udp --dport 8211 -s <trusted_management_network> -j ACCEPT
iptables -A INPUT -p udp --dport 8211 -j DROP