CVE-2018-8714 in MatrikonOPC OPC Controller
Summary
by MITRE
Honeywell MatrikonOPC OPC Controller before 5.1.0.0 allows local users to transfer arbitrary files from a host computer and consequently obtain sensitive information via vectors related to MSXML libraries.
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Analysis
by VulDB Data Team • 02/07/2020
The vulnerability identified as CVE-2018-8714 affects Honeywell MatrikonOPC OPC Controller versions prior to 5.1.0.0, representing a critical security flaw that enables local attackers to execute unauthorized file transfers from host systems. This vulnerability specifically leverages weaknesses within the Microsoft XML (MSXML) libraries that are integrated into the OPC controller software, creating a pathway for information disclosure attacks. The issue stems from insufficient validation mechanisms within the file transfer functionality, allowing malicious users with local access to manipulate the underlying MSXML components to extract sensitive data from the host computer. The attack vector operates through the exploitation of improper input handling within the OPC controller's file transfer processes, where MSXML libraries fail to properly sanitize user-supplied data before processing file operations.
The technical exploitation of this vulnerability involves the manipulation of MSXML library functions to bypass normal file access controls and transfer arbitrary files from the target system. Local users can leverage this flaw to access files that should normally be restricted, potentially including configuration files, log data, or other sensitive information stored on the host computer. The vulnerability demonstrates characteristics consistent with CWE-22 Improper Limitation of a Pathname to a Restricted Directory, as the system fails to properly restrict file access paths during transfer operations. Additionally, the flaw exhibits elements of CWE-73 Improper Control of File Name or Path, where the application does not adequately validate or sanitize file paths before processing. The MSXML library component becomes a critical attack surface through which malicious file operations can be initiated without proper authorization.
The operational impact of CVE-2018-8714 extends beyond simple information disclosure, as the ability to transfer arbitrary files from a compromised host creates opportunities for further attack escalation. An attacker who successfully exploits this vulnerability can potentially extract configuration details, system credentials, or other sensitive data that could be used for additional compromise attempts. The local privilege requirement reduces the complexity of exploitation but does not eliminate the risk, as local access often represents a foothold that can be gained through various attack vectors such as credential theft, physical access, or other initial compromise methods. The vulnerability directly impacts the confidentiality aspect of the CIA triad and can potentially enable privilege escalation or lateral movement within affected networks. Organizations utilizing Honeywell MatrikonOPC OPC Controller software in industrial control systems or other critical infrastructure environments face significant risks from this flaw.
Mitigation strategies for CVE-2018-8714 should prioritize immediate software updates to version 5.1.0.0 or later, which contain patches addressing the MSXML library vulnerabilities. System administrators should implement strict access controls and monitor local user activities on systems running affected OPC controller software. Network segmentation and the principle of least privilege should be enforced to limit potential damage from successful exploitation attempts. Regular vulnerability assessments should include checks for outdated OPC software components and proper patch management procedures. The remediation process should also involve reviewing and updating security policies to address local privilege escalation risks and ensure that MSXML libraries are properly configured with appropriate security settings. Organizations should consider implementing intrusion detection systems that can identify anomalous file transfer activities and establish monitoring procedures for detecting unauthorized file access attempts. This vulnerability aligns with ATT&CK technique T1074.001 Data Staged and T1005 Data from Local System, highlighting the need for comprehensive endpoint protection measures and regular security audits of industrial control systems.