28 August 2019
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3249 Advisory (icsa-19-239-01) Delta Controls enteliBUS Controllers 28 August 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: enteliBUS Controllers Publisher: US-CERT Operating System: Network Appliance Impact/Access: Administrator Compromise -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-9569 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-239-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-239-01) Delta Controls enteliBUS Controllers Original release date: August 27, 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 9.8 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Delta Controls o Equipment: enteliBUS Controllers o Vulnerability: Buffer Overflow 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker on the same network to gain complete control of the device's operating system and allow remote code execution. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Delta Controls enteliBUS Controllers, industrial control systems, are affected: o enteliBUS Manager firmware Versions 3.40 R5 build 571848 and prior o enteliBUS Manager Touch (eBMGR-TCH) firmware Versions 3.40 R5 build 571848 and prior o enteliBUS Controller (eBCON) firmware Versions 3.40 R5 build 571848 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 BUFFER COPY WITHOUT CHECKING SIZE OF INPUT ('CLASSIC BUFFER OVERFLOW') CWE-120 The affected products are vulnerable to a buffer overflow condition due to the lack of input validation, which may allow an attacker to remotely execute arbitrary code. CVE-2019-9569 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Government Facilities o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Canada 3.4 RESEARCHER Douglas McKee @fulmetalpackets and contributing researcher Mark Bereza @ROPsicle of McAfee Advanced Threat Research reported this vulnerability to Delta Controls. 4. MITIGATIONS Delta Controls recommends users upgrade from enteliBUS 3.40 firmware to Version 3.40 R6 build 612850. Delta Controls also states it is important buildings are updated to the 3.40 R6 release to mitigate risk. The firmware is only accessible by Delta Controls registered partners and is not available for public download. To acquire the firmware update, contact a Delta Controls distributor or Delta Controls directly. In addition to upgrading enteliBUS, Delta Controls recommends the following actions to secure building sites: o Do not leave building controllers exposed to the Internet. If remote connections to the network are required, use a virtual private network (VPN). Secure networks using Tempered Networks products (available through Delta Controls). o Regularly review and validate the list of users authorized to access sites and controllers. o Ensure personnel with access to the system are knowledgeable about and are trained to use Delta Controls products and networks. o Follow security industry recommended practices for securing sites . For more information on the vulnerability and more detailed mitigation instructions, please see Delta Controls Security Bulletin "SecB0001: enteliBUS 3.40 Controllers Remote Code Execution Vulnerability." (Login required; only accessible by Delta Controls registered partners and not available for public download.) 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 onus-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. No known public exploits specifically target this vulnerability. - --------------------------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 firstname.lastname@example.org 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. 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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: email@example.com 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). 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