CVE-2023-22331 in CONPROSYS HMI System
Summary
by MITRE • 01/20/2023
Use of default credentials vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote unauthenticated attacker to alter user credentials information.
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Analysis
by VulDB Data Team • 09/28/2025
The vulnerability identified as CVE-2023-22331 represents a critical security flaw in the CONPROSYS HMI System version 3.4.5 and earlier releases. This issue stems from the improper configuration of authentication mechanisms within the system's user management framework, creating a persistent security weakness that exposes industrial control systems to unauthorized access. The flaw specifically manifests through the use of default credentials that remain unchanged post-installation, providing attackers with persistent access vectors to manipulate user account information without requiring authentication. This vulnerability directly impacts the integrity and confidentiality of industrial automation environments where such systems are deployed, potentially compromising critical infrastructure operations.
The technical implementation of this vulnerability resides in the system's default credential configuration process, which fails to enforce strong authentication requirements during initial setup. According to CWE-798 standards, the use of hardcoded or default credentials represents a fundamental security misconfiguration that enables unauthorized access to system resources. The flaw allows remote attackers to exploit the system through unauthenticated network connections, leveraging the default administrative credentials to modify user account information, including passwords and access permissions. This represents a classic privilege escalation vector where minimal effort can yield maximum impact, as the default credentials are often publicly documented and readily available in various security databases and forums. The vulnerability specifically affects the user management module of the CHS system, where authentication controls are bypassed through the exploitation of these hardcoded credentials.
The operational impact of CVE-2023-22331 extends beyond simple credential manipulation to potentially compromise entire industrial control networks. Attackers can leverage this vulnerability to establish persistent access to the HMI system, enabling them to monitor operations, modify control parameters, or escalate privileges to gain deeper system access. This vulnerability aligns with ATT&CK technique T1078.004, which describes legitimate credentials usage for unauthorized access, making detection particularly challenging as the malicious activity appears to originate from legitimate administrative accounts. The implications are severe for critical infrastructure sectors including manufacturing, energy, and utilities, where such compromise could lead to production disruptions, safety hazards, or unauthorized control of industrial processes. Organizations utilizing CONPROSYS HMI Systems in operational technology environments face significant risk exposure, as this vulnerability can facilitate lateral movement within network segments and provide attackers with persistent access to industrial control systems.
Mitigation strategies for CVE-2023-22331 should prioritize immediate credential management actions including the enforcement of strong password policies, immediate change of default credentials, and implementation of multi-factor authentication where possible. System administrators must conduct comprehensive inventory assessments to identify all affected installations and ensure proper configuration of authentication mechanisms. The vulnerability requires immediate patching or upgrade to versions that address the default credential implementation, as specified by the vendor's security advisories. Network segmentation and access control measures should be implemented to limit the attack surface, while continuous monitoring of authentication logs should be established to detect potential exploitation attempts. Organizations should also consider implementing security awareness training for personnel managing these systems to prevent social engineering attacks that might exploit this vulnerability, as the use of default credentials often indicates poor security hygiene practices that extend beyond the technical implementation.