CVE-2023-3322 in Ability Zenon
Summary
by MITRE • 07/24/2023
A vulnerability exists by allowing low-privileged users to read and update the data in various directories used by the Zenon system. An attacker could exploit the vulnerability by using specially crafted programs to exploit the vulnerabilities by allowing them to run on the zenon installed hosts. This issue affects ABB Ability™ zenon: from 11 build through 11 build 106404.
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Analysis
by VulDB Data Team • 08/16/2023
The vulnerability identified as CVE-2023-3322 represents a critical privilege escalation and data exposure flaw within the ABB Ability™ zenon industrial automation software platform. This vulnerability specifically targets the access control mechanisms implemented within the zenon system, allowing low-privileged user accounts to gain unauthorized read and write access to sensitive directories and data structures that should typically be restricted to administrators or high-privilege entities. The flaw exists within the software's permission model and directory access controls, creating a pathway for unauthorized data manipulation and information disclosure.
The technical implementation of this vulnerability stems from inadequate access control validation within the zenon runtime environment. When low-privileged users execute specially crafted programs or scripts on hosts where zenon is installed, the system fails to properly enforce the security boundaries that should separate user access levels. This weakness enables attackers to traverse directory structures and manipulate data within various system directories that contain configuration files, operational parameters, and potentially sensitive industrial control information. The vulnerability manifests as a failure in the authorization enforcement mechanism that should prevent unauthorized access to protected system resources, making it a direct violation of the principle of least privilege and mandatory access controls.
The operational impact of CVE-2023-3322 extends beyond simple data exposure to encompass potential operational technology (OT) disruption and industrial control system compromise. In industrial environments where zenon serves as a critical component of process control and monitoring, an attacker with this vulnerability could potentially manipulate operational parameters, alter configuration settings, or access sensitive process data that could lead to production disruptions, safety hazards, or unauthorized control system modifications. The affected version range from build 11 through build 106404 indicates this is a widespread issue affecting multiple iterations of the software, suggesting the vulnerability has been present for an extended period and potentially exploited in the wild. This vulnerability directly maps to CWE-284 (Improper Access Control) and could be leveraged to achieve tactics described in the MITRE ATT&CK framework under T1078 (Valid Accounts) and T1566 (Phishing for Information) for initial access, followed by T1059 (Command and Scripting Interpreter) and T1068 (Exploitation for Privilege Escalation) for exploitation and escalation.
Mitigation strategies for CVE-2023-3322 should prioritize immediate patch deployment from ABB as the primary remediation approach, as this vulnerability affects a specific software version range that requires targeted updates. Organizations should implement network segmentation to limit access to zenon hosts, enforce strict user access controls, and conduct thorough privilege audits to minimize the attack surface. Additionally, monitoring for unauthorized access attempts and unusual directory traversal activities should be implemented through security information and event management systems. The vulnerability highlights the importance of proper access control implementation in industrial control systems and demonstrates the critical need for regular security assessments of OT environments. System administrators should also consider implementing additional layers of security including intrusion detection systems, privileged access management solutions, and regular security training for personnel who interact with industrial control systems to prevent exploitation of similar access control weaknesses.