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  • Omron addressed multiple flaws in its CX-Supervisor product

Omron addressed multiple flaws in its CX-Supervisor product

Pierluigi Paganini January 21, 2019

The electronics firm Omron released a security update to address flaws in its CX-Supervisor product that can be exploited DoS attacks and remote code execution.

CX-Supervisor allows to rapidly create human-machine interfaces (HMIs) for supervisory control and data acquisition (SCADA) systems thanks to the availability of a large number of predefined functions and libraries. The software is widely adopted in multiple industries, mainly in the energy sector.

The vulnerabilities were reported through Trend Micro’s Zero Day Initiative (ZDI). by the security expert Esteban Ruiz of Source Incite. One of the vulnerabilities, tracked as CVE-2018-19027 received a “high” severity rating.

The CVE-2018-19027 flaw affects the CX-One products, the flaw was reported to the vendor on 2018-07-02 while it was publicly disclosed on 2019-01-14.

“This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of OMRON CX-One CX-Protocol. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.” reported the advisory published by ZDI.

“The specific flaw exists within the handling of PSW files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process.”

CX-Supervisor Omron

The ICS-CERT published an advisory that includes details for all the vulnerabilities discovered by the expert, The addressed issues include a use-after-free, lack of proper validation for user-supplied input, and type confusion issues that can be exploited by attackers to execute arbitrary code on the vulnerable systems.

The “IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77″ could allow and attacker to inject commands to delete files and/or delete the contents of a file on the system by using a specially crafted project file. The exploitation of this bug, tracked as CVE-2018-19013 can cause a DoS condition, the issue has received a CVSS v3 base score of 5.0.

The vulnerabilities have been addressed with the release of version 3.5.0.11 of CX-Supervisor.
The ICS-CERT also suggest to upgrade development projects and save them in the new format, then rebuilt in the latest 3.5.0.11 format.

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Pierluigi Paganini

CX-Supervisor, ICS (SecurityAffairs – CX-Supervisor, ICS)

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