CVE-2024-48840: ABB ASPECT-ENT-2 Firmware RCE Vulnerability

CVE-2024-48840 Overview

CVE-2024-48840 is a critical unauthorized access vulnerability affecting ABB's building automation and energy management systems, including the ASPECT Enterprise, NEXUS Series, and MATRIX Series product lines. This vulnerability enables remote code execution (RCE) through improper access control mechanisms, allowing unauthenticated attackers to execute arbitrary code on vulnerable devices over the network.

The vulnerability is classified under CWE-94 (Improper Control of Generation of Code), indicating that the affected systems fail to properly restrict the generation or execution of code based on user-supplied input. Given the industrial nature of these devices and their role in building automation systems, successful exploitation could lead to complete system compromise, disruption of critical infrastructure operations, and potential lateral movement within operational technology (OT) networks.

Critical Impact

Unauthenticated attackers can achieve remote code execution on ABB building automation systems, potentially compromising critical infrastructure and OT environments.

Affected Products

• ABB ASPECT Enterprise (ASPECT-ENT-2, ASPECT-ENT-12, ASPECT-ENT-96, ASPECT-ENT-256) firmware versions prior to v3.08.02
• ABB NEXUS Series (NEXUS-2128, NEXUS-264, NEXUS-3-2128, NEXUS-3-264 and variants) firmware versions prior to v3.08.02
• ABB MATRIX Series (MATRIX-11, MATRIX-216, MATRIX-232, MATRIX-264, MATRIX-296) firmware versions prior to v3.08.02

Discovery Timeline

• December 5, 2024 - CVE-2024-48840 published to NVD
• February 27, 2025 - Last updated in NVD database

Technical Details for CVE-2024-48840

Vulnerability Analysis

This vulnerability stems from improper code generation controls within the affected ABB building automation products. The flaw allows attackers to inject and execute arbitrary code without requiring authentication, which is particularly dangerous given the network-accessible nature of these devices.

ABB building automation systems like ASPECT, NEXUS, and MATRIX are commonly deployed in enterprise environments to manage critical building functions including HVAC, lighting, access control, and energy management. The ability to execute arbitrary code on these systems could allow attackers to manipulate building operations, disable safety systems, or use the compromised devices as a pivot point for further network intrusion.

The network-based attack vector combined with no required privileges or user interaction makes this vulnerability highly exploitable. Attackers can potentially achieve high impact on confidentiality and integrity of the affected systems, with additional limited impact on system availability and scope extending to other connected systems.

Root Cause

The root cause of CVE-2024-48840 is improper control of code generation (CWE-94) within the firmware of affected ABB products. The vulnerable components fail to properly validate or sanitize input that is used in code generation or execution contexts, allowing attackers to inject malicious code that the system will execute with elevated privileges.

This type of vulnerability typically arises when user-controlled input is incorporated into dynamically generated code without adequate sanitization, or when the system exposes code execution capabilities through interfaces that lack proper authentication and authorization checks.

Attack Vector

The attack can be executed remotely over the network without authentication. An attacker with network access to vulnerable ABB devices can send specially crafted requests that exploit the code injection vulnerability. The attack requires no user interaction and has low complexity, making it accessible to attackers with limited technical sophistication.

The exploitation scenario involves an attacker identifying network-accessible ABB ASPECT, NEXUS, or MATRIX devices running vulnerable firmware versions, then crafting malicious payloads that leverage the improper code control mechanisms to achieve arbitrary code execution. Once code execution is achieved, attackers can install persistent backdoors, exfiltrate sensitive configuration data, manipulate building automation functions, or use the compromised device as a launching point for further attacks within the OT network.

Detection Methods for CVE-2024-48840

Indicators of Compromise

• Unexpected outbound network connections from ABB building automation devices to unknown external IP addresses
• Unusual processes or services running on affected devices that deviate from baseline configurations
• Modifications to device firmware or configuration files outside of scheduled maintenance windows
• Authentication failures or anomalous access patterns in device logs

Detection Strategies

• Deploy network monitoring to identify suspicious traffic patterns to and from ABB building automation devices
• Implement behavioral analysis to detect anomalous command execution or process spawning on affected systems
• Configure IDS/IPS rules to alert on known exploitation patterns targeting ABB devices
• Perform regular firmware integrity checks against known-good baseline images

Monitoring Recommendations

• Enable comprehensive logging on all ABB ASPECT, NEXUS, and MATRIX devices and forward logs to a centralized SIEM
• Monitor network segments containing building automation systems for unusual traffic patterns
• Establish baseline behavior profiles for affected devices and alert on deviations
• Conduct periodic vulnerability scans targeting OT/ICS network segments to identify unpatched systems

How to Mitigate CVE-2024-48840

Immediate Actions Required

• Identify all ABB ASPECT, NEXUS, and MATRIX devices in your environment and determine current firmware versions
• Isolate vulnerable devices from untrusted network segments until patching can be completed
• Apply firmware updates to version 3.08.02 or later as provided by ABB
• Implement strict network access controls to limit exposure of building automation systems

Patch Information

ABB has released firmware version 3.08.02 to address this vulnerability. Organizations should obtain the security update from the ABB Security Advisory and apply it to all affected ASPECT Enterprise, NEXUS Series, and MATRIX Series devices. Before deploying updates in production environments, test firmware updates in a controlled setting to verify compatibility with existing configurations.

Workarounds

• Segment building automation networks from corporate IT networks using firewalls and VLANs
• Implement strict access control lists (ACLs) to restrict network access to affected devices to authorized management stations only
• Disable unnecessary network services and protocols on affected devices where possible
• Deploy network-based intrusion prevention systems (IPS) capable of inspecting traffic to OT/ICS devices

# Example network segmentation firewall rules (iptables)
# Block external access to ABB building automation devices
iptables -A INPUT -p tcp -d <ABB_DEVICE_IP> --dport 80 -s ! <TRUSTED_MGMT_NETWORK> -j DROP
iptables -A INPUT -p tcp -d <ABB_DEVICE_IP> --dport 443 -s ! <TRUSTED_MGMT_NETWORK> -j DROP
iptables -A INPUT -p tcp -d <ABB_DEVICE_IP> --dport 502 -s ! <TRUSTED_MGMT_NETWORK> -j DROP