CVE-2023-35972: Arubanetworks ArubaOS RCE Vulnerability

CVE-2023-35972 Overview

CVE-2023-35972 is an authenticated remote command injection vulnerability affecting the ArubaOS web-based management interface. This vulnerability allows an authenticated attacker to inject and execute arbitrary commands with privileged user permissions on the underlying operating system. Successful exploitation enables complete compromise of the affected device running ArubaOS, granting attackers full control over network infrastructure components.

The vulnerability is classified as CWE-77 (Command Injection), indicating improper neutralization of special elements used in a command. Network infrastructure devices running vulnerable versions of ArubaOS are at risk, particularly in enterprise environments where these devices manage critical network segments.

Critical Impact

Successful exploitation allows attackers to execute arbitrary commands as a privileged user, enabling full compromise of the underlying operating system on affected ArubaOS devices.

Affected Products

• ArubaNetworks ArubaOS
• ArubaNetworks MC-VA Series (MC-VA-10, MC-VA-50, MC-VA-250, MC-VA-1K)
• ArubaNetworks MCR-VA Series (MCR-VA-50, MCR-VA-500, MCR-VA-1K, MCR-VA-5K, MCR-VA-10K)
• ArubaNetworks MCR-HW Series (MCR-HW-1K, MCR-HW-5K, MCR-HW-10K)
• ArubaNetworks SD-WAN

Discovery Timeline

• July 5, 2023 - CVE-2023-35972 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2023-35972

Vulnerability Analysis

This command injection vulnerability resides within the web-based management interface of ArubaOS. The flaw occurs when user-supplied input is incorporated into operating system commands without proper sanitization or validation. While authentication is required to exploit this vulnerability, once an attacker obtains valid credentials (through phishing, credential theft, or other means), they can leverage this flaw to execute arbitrary commands.

The attack is conducted over the network and does not require user interaction beyond the initial authentication. The vulnerability affects confidentiality, integrity, and availability of the target system, as command execution at the privileged level provides complete control over the device.

Root Cause

The root cause is improper neutralization of special elements used in command construction (CWE-77). The ArubaOS web management interface fails to adequately sanitize user input before passing it to system shell commands. This allows specially crafted input containing command separators or shell metacharacters to break out of the intended command context and execute attacker-controlled commands.

Attack Vector

The attack vector for CVE-2023-35972 is network-based, requiring authenticated access to the ArubaOS web management interface. An attacker must first obtain valid administrative credentials to access the vulnerable interface. Once authenticated, the attacker can craft malicious HTTP requests containing command injection payloads directed at vulnerable parameters within the management interface.

The exploitation flow typically involves:

1. Authenticating to the ArubaOS web management interface with valid credentials
2. Identifying vulnerable input fields that are processed by system commands
3. Injecting shell metacharacters and malicious commands into the vulnerable parameters
4. The injected commands execute with the privileges of the web server process, typically root or equivalent

Due to the sensitive nature of this vulnerability, specific exploitation details are not provided. Refer to the Aruba Networks Security Advisory for technical details and affected version information.

Detection Methods for CVE-2023-35972

Indicators of Compromise

• Unusual or unexpected processes spawning from the web server process on ArubaOS devices
• Authentication logs showing suspicious login attempts followed by unusual administrative actions
• Unexpected outbound network connections from ArubaOS management interfaces
• Modified system files or configurations not attributable to legitimate administrative activity

Detection Strategies

• Monitor web management interface logs for requests containing shell metacharacters such as ;, |, &, $(), or backticks
• Implement network detection rules to identify command injection patterns in HTTP traffic to ArubaOS devices
• Deploy behavioral analysis to detect anomalous process execution on network infrastructure devices
• Review authentication logs for credential abuse patterns followed by administrative actions

Monitoring Recommendations

• Enable comprehensive logging on all ArubaOS web management interfaces
• Centralize logs from network infrastructure devices for correlation and analysis
• Implement alerting for failed and successful authentication attempts to management interfaces
• Monitor for configuration changes and command execution on ArubaOS devices through SIEM integration

How to Mitigate CVE-2023-35972

Immediate Actions Required

• Apply the security patches provided by Aruba Networks as documented in ARUBA-PSA-2023-008
• Restrict access to ArubaOS web management interfaces to trusted IP addresses only
• Review and audit administrative credentials for all ArubaOS devices
• Enable multi-factor authentication for management interface access where supported

Patch Information

Aruba Networks has released security updates to address this vulnerability. Organizations should consult the Aruba Networks Security Advisory ARUBA-PSA-2023-008 for specific version information and upgrade guidance. It is critical to update all affected ArubaOS installations to the latest patched versions as soon as possible.

Workarounds

• Disable web-based management interface access from untrusted networks
• Implement network segmentation to isolate management interfaces from general network traffic
• Use jump hosts or bastion servers for administrative access to reduce attack surface
• Deploy web application firewalls (WAF) with command injection detection rules in front of management interfaces where feasible

# Example: Restrict management interface access via ACL
# Consult Aruba documentation for specific implementation
# Limit access to trusted management networks only
ip access-list session mgmt-restrict
  permit ip 10.0.0.0/24 any
  deny ip any any