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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3697 Advisory (icsa-19-274-03) Moxa EDR 810 Series 2 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Moxa EDR 810 Series Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-10969 CVE-2019-10963 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-274-03 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-274-03) Moxa EDR 810 Series Original release date: October 01, 2019 Legal Notice All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.2 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Moxa o Equipment: EDR 810 o Vulnerabilities: Improper Input Validation, Improper Access Control 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow remote code execution or access to sensitive information. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of the Moxa EDR 810 router are affected: EDR-810: All versions 5.1 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER INPUT VALIDATION CWE-20 An authenticated attacker may abuse the ping feature to execute unauthorized commands on the router, which could allow an attacker to perform remote code execution. CVE-2019-10969 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/ C:H/I:H/A:H ). 3.2.2 IMPROPER ACCESS CONTROL CWE-284 An unauthenticated attacker may be able to retrieve some log files from the device, which may allow sensitive information disclosure. Log files must have previously been exported by a legitimate user. CVE-2019-10963 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/ C:L/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Taiwan 3.4 RESEARCHER 4. MITIGATIONS Moxa recommends users upgrade to the latest firmware, v5.2 or later. For more information, please see Moxa's security advisory . CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o 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. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.gov . Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXZQ6+2aOgq3Tt24GAQhhyRAAqzNu+ugiDlxavBwM6K+4IaJW3nITdVE9 o2Ww/otR/fY1PSE9hRDR4hMUfWGM+iJsbzphki7oMUWwA66TYD7GpAH1RLxUFLP5 VkWPP/tIkxxBzQ5HQ0k8Otgx9L2/ywFzbP21q4BISo8KLvustylSKgG4HvucWggz koOoKnkshhhsZLxzi2Z2QAEO9XQBRTgG/tLpc7p2xkVTCYvf3jRRmSiAOupebeTH glAWhb/uQE10I4u+hz8bkSi9zV0fXY3VxbGE4rlP/8vEjMYovF+H50eUEZCsaahO EM8HjLw2JdjlO6pAMR6OVNdfCWH7H5e4LwrFYizgJOjVPgjoW1enUuTtmDRX0v5N Hxo2fjLOYHCk0XJH0IIgtMRO2ib+FXc07L3Wfr+Hg+QruGIyiG3kyt9HEUwbjuae uTLdgo2u8EYoLxUdu2j4BWMubundJhhj+DwaCnDxwBSP35ZJTizKXB/zCeFuHJDd i4+Ic3+6kdHzvCzKxzkxqeKgq9I05pi36wnjbGn51jARkRc8H5IPjAWd2glwufjI 6bTAD2mwNwkAn5xjh9z4WUzOvBuErldpjwSE3Y28tmrBllXIeJa1XzwMnA2QkzpG 0SFxhABHF80e/jLc7NqmoiSyIO9EBouZAJHrPI/hYst+moyEt+S7TxhTuDTFsOyL 33EEideCoFQ= =x6nm -----END PGP SIGNATURE-----