Hetronic Nova-M Authentication Bypass by Capture-Replay (CVE-2018-19023)

# ICS Advisory (ICSA-19-003-03) ## Hetronic Nova-M Original release date: January 03, 2019 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-003-03) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-003-03) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-003-03) ### 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 7.6** * **ATTENTION:** Low skill level to exploit * **Vendor:** Hetronic * **Equipment:** Nova-M * **Vulnerability:** Authentication Bypass by Capture-Replay ## 2\. RISK EVALUATION Successful exploitation of this vulnerability could allow unauthorized users to view commands, replay commands, control the device, or stop the device from running. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following versions of Hetronic remote control transmitters and receivers are affected: Transmitters: * Nova-M: all versions prior to r161, Receivers: * ES-CAN-HL: all versions prior to Main r1864, Estop_v24, * BMS-HL: all versions prior to Main r1175, Estop_v24, * MLC: all versions prior to Main r1600, Estop_v24, and * DC Mobile: all versions prior to Main r515, Estop_v24. ### 3.2 VULNERABILITY OVERVIEW **3.2.1 [AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294](https://cwe.mitre.org/data/definitions/294.html)** These devices use fixed codes that are reproducible by sniffing and re- transmission. This can lead to unauthorized replay of a command, spoofing of an arbitrary message, or keeping the controlled load in a permanent "stop" state. [CVE-2018-19023](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19023) has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been calculated; the CVSS vector string is ([AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTORS:** Multiple * **COUNTRIES/AREAS DEPLOYED:** Worldwide * **COMPANY HEADQUARTERS LOCATION:** United States ### 3.4 RESEARCHER Jonathan Andersson, Philippe Z Lin, Akira Urano, Marco Balduzzi, Federico Maggi, Stephen Hilt, and Rainer Vosseler working with Trend Micro's Zero Day Initiative reported this vulnerability to NCCIC. ## 4\. MITIGATIONS Hetronic recommends that all Nova-M users update their radio transmitters to firmware version r161 and their receivers to the following versions: * ES-CAN-HL: Main r1864, Estop_v24 * BMS-HL: Main r1175, Estop_v24 * MLC: Main r1600, Estop_v24 * DC Mobile: Main r515, Estop_v24 The new firmware patches can be obtained free of charge by signing in to the Hetronic website portal or by bringing the transmitter and receiver to any Hetronic service center. A list of service centers can be found at the following link: <http://www.hetronic.com/contact-us/find-a-partner> 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 this vulnerability.