CVE-2018-7530 in CX-One
Summary
by MITRE
Parsing malformed project files in Omron CX-One versions 4.42 and prior, including the following applications: CX-FLnet versions 1.00 and prior, CX-Protocol versions 1.992 and prior, CX-Programmer versions 9.65 and prior, CX-Server versions 5.0.22 and prior, Network Configurator versions 3.63 and prior, and Switch Box Utility versions 1.68 and prior, may allow the pointer to call an incorrect object resulting in an access of resource using incompatible type condition.
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Analysis
by VulDB Data Team • 01/25/2020
The vulnerability identified as CVE-2018-7530 represents a critical memory corruption issue affecting Omron CX-One software suite and its constituent applications. This flaw manifests in the improper handling of project files during parsing operations, where malformed input data can trigger unpredictable behavior in the software's memory management systems. The affected versions encompass a broad range of industrial automation tools including CX-FLnet, CX-Protocol, CX-Programmer, CX-Server, Network Configurator, and Switch Box Utility, all of which are integral components of Omron's industrial control ecosystem. The vulnerability stems from insufficient validation mechanisms within the file parsing logic, particularly when processing project files that contain malformed or unexpected data structures.
The technical implementation of this vulnerability involves a classic buffer over-read or pointer manipulation issue where the software attempts to access memory resources using incorrect object references. When parsing malformed project files, the application's parser fails to properly validate input data structures, leading to scenarios where pointers may reference memory locations that do not correspond to the expected object types. This condition creates opportunities for arbitrary code execution or system instability, as the software attempts to operate on data that does not conform to its expected memory layout. The issue is classified under CWE-125 as an out-of-bounds read, which is a common precursor to more severe memory corruption vulnerabilities. The vulnerability's impact is amplified by the industrial nature of the affected applications, where these tools are used for programming and configuring critical industrial control systems.
The operational implications of this vulnerability extend beyond simple software instability, particularly within industrial control environments where reliability and security are paramount. Attackers could potentially exploit this vulnerability through social engineering tactics or by delivering malicious project files via USB devices, network shares, or other attack vectors. The exploitation could lead to complete system compromise, allowing unauthorized individuals to execute arbitrary code on industrial control systems, potentially disrupting critical manufacturing processes or gaining access to sensitive operational data. This vulnerability aligns with ATT&CK technique T1059.005 for command and scripting interpreter and T1068 for exploit for privilege escalation, as the memory corruption could enable attackers to gain elevated privileges within the industrial control environment. The widespread adoption of these tools across industrial facilities creates a significant risk landscape where a single compromised system could affect entire production lines.
Mitigation strategies for this vulnerability should prioritize immediate software updates to versions that address the parsing logic flaws and implement proper input validation mechanisms. Organizations should conduct comprehensive vulnerability assessments of their industrial control systems to identify all instances of affected software versions and ensure proper patch management procedures are in place. Network segmentation and access controls should be implemented to limit the potential attack surface, particularly for industrial control systems that may be exposed to external networks. Additionally, implementing application whitelisting policies and restricting user privileges for industrial automation tools can help reduce the risk of exploitation. Security monitoring should be enhanced to detect unusual file access patterns or attempts to load malformed project files, as these activities could indicate attempted exploitation of this vulnerability. The remediation process should also include comprehensive staff training on recognizing potential social engineering attacks that could deliver malicious project files, given the nature of the vulnerability's exploitation vector.