CVE-2023-1133: Deltaww InfraSuite Device Master RCE Flaw

CVE-2023-1133 Overview

Delta Electronics InfraSuite Device Master versions prior to 1.0.5 contain a critical insecure deserialization vulnerability in the Device-status service. The service listens on port 10100/UDP by default and accepts unverified UDP packets, deserializing their content without proper validation. This flaw allows an unauthenticated attacker to remotely execute arbitrary code on vulnerable systems, potentially leading to complete system compromise.

Critical Impact

Unauthenticated remote code execution via insecure deserialization in industrial control system management software, enabling attackers to gain complete control of affected systems without any user interaction.

Affected Products

• Delta Electronics InfraSuite Device Master versions prior to 1.0.5
• Systems running Device-status service on port 10100/UDP
• Industrial control system environments utilizing InfraSuite for device management

Discovery Timeline

• March 27, 2023 - CVE-2023-1133 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2023-1133

Vulnerability Analysis

This vulnerability is classified as CWE-502 (Deserialization of Untrusted Data). The Device-status service in Delta Electronics InfraSuite Device Master implements a UDP listener on port 10100 that processes incoming packets without verifying their source or validating the content before deserialization. When the service receives a UDP packet, it directly deserializes the payload data, trusting that the content is legitimate.

The lack of authentication combined with improper deserialization handling creates a severe attack surface. An attacker can craft malicious serialized objects that, when deserialized by the vulnerable service, execute arbitrary code with the privileges of the InfraSuite Device Master application. This is particularly concerning in industrial control system (ICS) environments where this software is typically deployed to manage critical infrastructure devices.

Root Cause

The root cause of this vulnerability lies in the insecure implementation of the Device-status service's UDP packet handling mechanism. The service fails to implement several critical security controls:

1. Missing Authentication: The UDP service accepts packets from any source without verifying the sender's identity
2. Lack of Input Validation: Incoming packet data is not validated or sanitized before processing
3. Unsafe Deserialization: The service uses insecure deserialization methods that execute code embedded in serialized objects without restriction

Attack Vector

The attack vector is network-based, requiring only network access to the target system on UDP port 10100. The exploitation process involves:

1. The attacker identifies a system running InfraSuite Device Master with the Device-status service exposed
2. A malicious serialized payload is crafted containing code execution gadgets
3. The payload is sent as a UDP packet to port 10100 on the target system
4. The Device-status service deserializes the malicious content
5. Arbitrary code executes with the privileges of the InfraSuite application

The vulnerability requires no authentication, no user interaction, and has low attack complexity. Successful exploitation results in complete compromise of confidentiality, integrity, and availability of the affected system.

For detailed technical information and exploitation techniques, refer to the Packet Storm Security advisory and the CISA ICS Advisory ICSA-23-080-02.

Detection Methods for CVE-2023-1133

Indicators of Compromise

• Unexpected UDP traffic to port 10100 from external or unauthorized IP addresses
• Anomalous process execution spawned by the InfraSuite Device Master application
• Unusual network connections originating from systems running InfraSuite Device Master
• System logs indicating deserialization errors or exceptions in the Device-status service

Detection Strategies

• Deploy network intrusion detection systems (NIDS) with rules monitoring UDP traffic to port 10100
• Implement application whitelisting to detect unauthorized process execution from InfraSuite components
• Configure endpoint detection and response (EDR) solutions to monitor process behavior anomalies in the InfraSuite installation directory
• Utilize SentinelOne's behavioral AI to detect exploitation attempts through anomalous code execution patterns

Monitoring Recommendations

• Enable comprehensive logging for the InfraSuite Device Master application and its associated services
• Monitor network traffic patterns for unusual UDP packet sizes or frequencies to port 10100
• Implement real-time alerting for any process execution chains originating from the Device-status service
• Review firewall logs for external connection attempts to UDP port 10100

How to Mitigate CVE-2023-1133

Immediate Actions Required

• Upgrade Delta Electronics InfraSuite Device Master to version 1.0.5 or later immediately
• Implement network segmentation to isolate ICS/SCADA systems from general network traffic
• Block external access to UDP port 10100 at the network perimeter firewall
• Deploy SentinelOne agents on affected systems for real-time threat detection and automated response

Patch Information

Delta Electronics has released version 1.0.5 of InfraSuite Device Master to address this vulnerability. Organizations should apply this update as soon as possible following their change management procedures. Refer to the CISA ICS Advisory ICSA-23-080-02 for official patch guidance and additional security recommendations.

Workarounds

• Restrict network access to UDP port 10100 using host-based firewalls if patching is not immediately possible
• Implement network-level access controls to allow connections only from authorized management systems
• Consider disabling the Device-status service temporarily if it is not critical to operations
• Deploy network monitoring solutions to detect and alert on any exploitation attempts

# Firewall rule to restrict UDP port 10100 access (Linux iptables example)
# Allow only authorized management subnet
iptables -A INPUT -p udp --dport 10100 -s 192.168.100.0/24 -j ACCEPT
# Block all other UDP traffic to port 10100
iptables -A INPUT -p udp --dport 10100 -j DROP