Omron CX-One CX-Protocol Type Confusion (CVE-2018-19027)

# ICS Advisory (ICSA-19-010-02) ## Omron CX-One CX-Protocol Original release date: January 10, 2019 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-010-02) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-010-02) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-010-02) ### Legal Notice All information products included in [https://us-cert.gov/ics](/ics) are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see [https://www.us- cert.gov/tlp/](/tlp/). * * * ## 1\. EXECUTIVE SUMMARY * **CVSS v3 6.6** * **ATTENTION:** Low skill level to exploit * **Vendor:** Omron * **Equipment:** CX-Protocol within CX-One * **Vulnerabilities:** Type Confusion ## 2\. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to execute code under the privileges of the application. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS CX-One Versions 4.50 and prior, including the following applications: * CX-Protocol Versions 2.0 and prior ### 3.2 VULNERABILITY OVERVIEW **3.2.1 [ACCESS OF RESOURCE USING INCOMPATIBLE TYPE ('TYPE CONFUSION') CWE-843](https://cwe.mitre.org/data/definitions/843.html)** Three type confusion vulnerabilities exist when processing project files. An attacker could use a specially crafted project file to exploit and execute code under the privileges of the application. [CVE-2018-19027](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19027) has been assigned to this vulnerability. A CVSS v3 base score of 6.6 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTOR:** Critical Manufacturing * **COUNTRIES/AREAS DEPLOYED:** Worldwide * **COMPANY HEADQUARTERS LOCATION:** Japan ### 3.4 RESEARCHER Esteban Ruiz (mr_me) of Source Incite, working with Trend Micro's Zero Day Initiative, reported these vulnerabilities to NCCIC. ## 4\. MITIGATIONS Omron has released an updated version of CX-One to address the reported vulnerabilities. These releases are available through the CX-One auto-update service. * CX-Protocol Version 2.01 NCCIC also recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: * Minimize network exposure for all control system devices and/or systems, and ensure that they are [not accessible from the Internet](/ics/alerts/ICS-ALERT-10-301-01). * Locate control system networks and remote devices behind firewalls, and isolate them from the business network. * When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC also provides a section for [control systems security recommended practices](/ics/content/recommended-practices) on the ICS-CERT web page. Several recommended practices are available for reading and download, including [Improving Industrial Control Systems Cybersecurity with Defense-in- Depth Strategies](/sites/default/files/recommended_practices/NCCIC_ICS- CERT_Defense_in_Depth_2016_S508C.pdf). Additional mitigation guidance and recommended practices are publicly available on the [ICS-CERT website](/ics/) in the Technical Information Paper, [ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies](/ics/tips/ICS-TIP-12-146-01B). Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.