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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3091 Advisory (icsa-20-252-04) Siemens Spectrum Power 9 September 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens Spectrum Power Publisher: US-CERT Operating System: Network Appliance Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-15790 CVE-2020-15784 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-20-252-04 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-20-252-04) Siemens Spectrum Power Original release date: September 08, 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 3.7 o ATTENTION: Exploitable remotely o Vendor: Siemens o Equipment: Spectrum Power o Vulnerabilities: Cleartext Storage of Sensitive Information, Exposure of Information Through Directory Listing 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an unauthorized attacker to retrieve a list of software users, or in certain cases to list the contents of a directory. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Spectrum Power are affected: o Spectrum Power: All versions prior to v4.70 SP8 3.2 VULNERABILITY OVERVIEW 3.2.1 CLEARTEXT STORAGE OF SENSITIVE INFORMATION CWE-312 Insecure storage of sensitive information in the configuration files could allow the retrieval of usernames. CVE-2020-15784 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/ C:L/I:N/A:N ). 3.2.2 EXPOSURE OF INFORMATION THROUGH DIRECTORY LISTING CWE-548 The affected product may be susceptible to a directory listing attack if configured improperly. CVE-2020-15790 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/ C:L/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Can Demirel of Cyberwise reported these vulnerabilities to Siemens. 4. MITIGATIONS Siemens has released updates and configuration recommendations for Spectrum Power 4 to mitigate the issues. Please contact a Siemens representative for further information. Because operators of critical power systems (e.g., TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes, Siemens recommends that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design. Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens strongly recommends protecting network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to their operational guidelines to run the devices in a protected IT environment. See Siemens' recommended security guidelines for Digital Grid Products . For additional information, please refer to Siemens Security Advisory: SSA-568969 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. High skill level is needed to exploit. 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. 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). 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