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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3777 Advisory (icsa-19-281-02) GE Mark VIe Controller 9 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: GE Mark VIe Controller Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Root Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-13918 CVE-2019-13554 Reference: ESB-2019.3559 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-281-02 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-281-02) GE Mark VIe Controller Original release date: October 08, 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 6.8 o ATTENTION: Low skill level to exploit o Vendor: GE o Equipment: Mark VIe Controller o Vulnerabilities: Improper Authorization, Use of Hard-coded Credentials 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to create read/write/execute commands within the Mark VIe control system. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS All versions of the GE Mark VIe Controller are affected by at least one of the vulnerabilities. Some versions are affected by both. For more information contact GE. 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER AUTHORIZATION CWE-285 The affected product has an unsecured Telnet protocol that may allow a user to create an authenticated session using generic default credentials. CVE-2019-13554 has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/ C:L/I:L/A:L ). 3.2.2 USE OF HARD-CODED CREDENTIALS CWE - 798 The affected product is shipped with pre-configured hard-coded credentials that may allow root-user access to the controller. A limited application of the affected product may ship without setup and configuration instructions immediately available to the end user. The bulk of controllers go into applications requiring the GE commissioning engineer to change default configurations during the installation process. CVE-2019-13918 has been assigned to this vulnerability. A CVSS v3 base score of 6.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/ C:L/I:N/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTOR: Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Sharon Brizinov of Claroty reported these vulnerabilities to GE. 4. MITIGATIONS GE recommends users apply the following mitigations: o Disable the Telnet service (Telnet was enabled by default on Mark VIe controllers with versions of Control*ST earlier than v6.0). o Reset controller passwords upon transfer of Mark VIe to the operating environment GE Mark VIe Control system owners can request access and find instructions in GEH-6808, Control*ST Software Suite How to Guidelines. GE Mark VIe Control system owners can reference GEH-6839, Secure Deployment Guidelines, for further instruction on security actions with installation and maintenance of their control system. GE recommends organizations employ a defense-in-depth strategy through user authentication and authorization with features native to the control system to remediate security risk against the communication protocol vulnerabilities described. For more information contact GE at https://www.ge.com/security 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. No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. - --------------------------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. 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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: 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). 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