Omron CX-One Stack-based Buffer Overflow, Heap-based Buffer Overflow, Type Confusion _._ (CVE-2018-7530 CVE-2018-7514 CVE-2018-8834 )

# ICS Advisory (ICSA-18-100-02) ## Omron CX-One Original release date: April 10, 2018 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-100-02) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-100-02) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-100-02) ### 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 5.3** * **ATTENTION** : Low skill level to exploit. * **Vendor** : Omron * **Equipment** : CX-One * **Vulnerabilities:** Stack-based Buffer Overflow, Heap-based Buffer Overflow, Type Confusion _._ ## 2\. RISK EVALUATION Successful exploitation of these vulnerabilities could allow remote code execution. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following versions of CX-One are affected: * 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. ### 3.2 VULNERABILITY OVERVIEW ### 3.2.1 [HEAP-BASED BUFFER OVERFLOW CWE-122](https://cwe.mitre.org/data/definitions/122.html) Parsing malformed project files may cause a heap-based buffer overflow. [CVE-2018-8834](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8834) has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](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:L)). ### 3.2.2 [STACK-BASED BUFFER OVERFLOW CWE-121](https://cwe.mitre.org/data/definitions/121.html) Parsing malformed project files may cause a stack-based buffer overflow. [CVE-2018-7514](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7514) has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](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:L)). ### 3.2.3 [ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (TYPE CONFUSION) CWE-843](https://cwe.mitre.org/data/definitions/843.html) Parsing malformed project files may allow the pointer to call an incorrect object resulting in an access of resource using incompatible type condition. [CVE-2018-7530](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7530) has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](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:L)). ### 3.3 BACKGROUND * **Critical Infrastructure Sectors:** Critical Manufacturing * **Countries/Areas Deployed:** Worldwide * **Company Headquarters Location:** Japan ### 3.4 RESEARCHER Rgod, 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-FLnet version 1.10, * CX-Protocol version 1.993, * CX-Programmer versions 9.66, * Common Module including CX-Server version 5.0.23, * Network Configurator version 3.64, and * Switch Box Utility version 1.69 NCCIC recommends that users take the following measures to protect themselves from social engineering attacks: * Do not click web links or open unsolicited attachments in email messages. * Refer to [Recognizing and Avoiding Email Scams](/reading_room/emailscams_0905.pdf) for more information on avoiding email scams. * Refer to [Avoiding Social Engineering and Phishing Attacks](/cas/tips/ST04-014.html) for more information on social engineering attacks. 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 in the ICS‑CERT Technical Information Paper, [ICS-TIP-12-146-01B-- Targeted Cyber Intrusion Detection and Mitigation Strategies](/ics/tips/ICS- TIP-12-146-01B), that is available for download from the [ICS-CERT website.](/ics/) 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.