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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.1922 Advisory (icsa-20-154-02) ABB System 800xA Base 3 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ABB System 800xA Base Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Mitigation CVE Names: CVE-2020-8474 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-20-154-02 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-20-154-02) ABB System 800xA Base Original release date: June 02, 2020 Legal Notice All information products included in https://us-cert.gov/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/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.8 o ATTENTION: Low skill level to exploit o Vendor: ABB o Equipment: System 800xA Base o Vulnerability: Incorrect Permission Assignment for Critical Resource 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to escalate privileges and cause system functions to stop or malfunction. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of System 800xA Base are affected: o System 800xA Base: Versions 6.0 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732 Low privileged users can read and modify registry settings used to control system functionality. CVE-2020-8474 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Dams, Energy, Food and Agriculture, Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Switzerland 3.4 RESEARCHER William Knowles of Applied Risk reported this vulnerability to ABB. 4. MITIGATIONS ABB recommends changing any user account passwords suspected to be known by an unauthorized person. Interactive logon (both local and remote) is recommended to be disabled for the service account. This vulnerability is corrected in System 800xA Base 6.1 This vulnerability is planned to be corrected in the next release on the 6.0.3 LTS track after 6.0.3.3 Please note this vulnerability can only be exploited by authenticated users, so users are recommended to ensure only authorized persons have access to user accounts in System 800xA. For more information please refer to ABB's Cybersecurity Advisory . CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Follow the principle of least privilege. 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 this vulnerability. This vulnerability is not exploitable remotely. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------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. 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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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXtcPouNLKJtyKPYoAQjDSg/9F8e1cKMafC6GizL91j/WSJRrfgPA4c/6 DwW/t5d8N0gptl0v0+tD2MePy+L5DHVHxyOPS7L1kPS3R25cQ64kq9Sz9coBMpH7 TO9ykuUEpJzPZUQJf8+U62LL6ncDoMCs1Z1xDNvmdmqziHfslvvvHjdn4uAKtW6U b58xiDSOVg1sY85qwXpKvZitGJqcWKEjqrXBOe7RgxAj6Q8yWoKeU8cVEbir4U5O W0czNwaf2hnd7zVrkXvC7k/fk657i8cZIKpg+3NnvZaDRXH5RkcOQ7IW/PLfRQiz tNYKI2hYLJNqXT2aCiVL5t/sPJh6OMR7wfTpVc0p211wIV/IZZF1zq+lY0CL+vOj JFbFQTK+g2mI0vtA2gwHXneF5S6wSfOmAfihcfUfwdQJ2nPsZUD3dGl3svknqq+r oOkh0cJnlYydkkDcnfHNuyQZFDJg68xF6Qjp9dAyFb+9uB0Ebr8Bf2hfOgSXadsR GlB4m+0wXzwVgC42KE/DL7mMYeTQUYFvUrhdxk1khPrG/+YlpZsS+8JVcwwlMjqy tjda9j19StjdRAwV3nflZYczsKnKU2nWHLXaekMCAtGH8zh8s7OgWHEdsljhvmWX HrOWp6P4M/Ee/+bLj+MKXFr9ImpL7CtzDDYA/h3aR04Qc3OFe3rCfnwAeCQNwFhZ +l1NbD4gy1w= =S0Xu -----END PGP SIGNATURE-----