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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0262 Advisory (icsa-21-021-05) WAGO M&M Software fdtCONTAINER 22 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WAGO M&M Software fdtCONTAINER Publisher: ICS-CERT Operating System: Windows Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-12525 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-021-05 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-021-05) WAGO M&M Software fdtCONTAINER Original release date: January 21, 2021 Legal Notice All information products included in https://us-cert.cisa.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://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.3 o ATTENTION: Low skill level to exploit o Vendor: M&M Software GmbH, a subsidiary of WAGO Kontakttechnik o Equipment: fdtCONTAINER o Vulnerability: Deserialization of Untrusted Data 2. RISK EVALUATION If an attacker can socially engineer a valid user into loading a manipulated project file, malicious code can be executed without notice. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following products are affected: o fdtCONTAINER component Versions between 3.5.0 and 3.5.20304.x Versions between 3.6.0 and 3.6.20304.x Versions older than 3.5 o fdtCONTAINER application Versions between 4.5.0 and 4.5.20304.x Versions between 4.6.0 and 4.6.20304.x Versions older than 4.5 o dtmINSPECTOR Version 3 (Based on FDT 1.2.x) There are reports indicating the following products incorporate the affected component: o Emerson Rosemount Transmitter Interface Software (RTIS) SKUs: 04088-9000-0001, 4088-9000-0002, and 7000003-312 o PEPPERL+FUCHS PACTware 5.0, up to and including Version 5.0.5.31 3.2 VULNERABILITY OVERVIEW 3.2.1 DESERIALIZATION OF UNTRUSTED DATA CWE-502 A vulnerability has been discovered in the fdtCONTAINER component issued by M&M Software and used by other products, including RTIS and PACTware. An attacker might be able to exploit this vulnerability on the workstation running RTIS by supplying/providing a manipulated project file. If that project file is loaded, malicious code can be executed without notice. CVE-2020-12525 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:R/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy, Transportation Systems o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Emerson reported this vulnerability to CISA and M&M Software. 4. MITIGATIONS M&M Software recommends users choose one of the following solutions: o Update the fdtCONTAINER component/fdtCONTAINER application to a version that provides a more secure deserialization of the project data. This version will still use a deprecated serialization technology but will fix the currently known attack vector and will be compatible with existing, non-manipulated project files. o Update the fdtCONTAINER component/fdtCONTAINER application to a version (fdtCONTAINER component: 3.7 or newer, fdtCONTAINER application: 4.7 or newer) that provides a secure deserialization of the project data with an updated serialization technology. This will break the compatibility to existing, non-manipulated project files. The CERT@VDE advisory for M&M Software also recommends the following mitigation practices: o Exchange project data only via secure exchange services. o Use appropriate means to protect the project storage from unauthorized manipulation. o Do not open project data from an unknown source. o Reduce the user rights of the host application to the necessary minimum. Emerson recommends users ensure all workstations containing any software used to interact with field instruments be protected using industry cybersecurity best practices. Furthermore, Emerson has made the decision to discontinue RTIS so no additional software updates will be provided. Therefore, Emerson recommends users transition to the free AMS Instrument Inspector software as a replacement device configuration tool. For additional information, please contact Emerson Global Customer Care (24/7 Support) Phone: +1-888-889- 9170 or email: ContactUs@Emerson.com CERT@VDE has published an advisory ( VDE-2021-001 ) for this vulnerability in PEPPERL+FUCHS PACTware. CISA recommends users take the following measures to protect themselves from social engineering attacks: o Ensure the least-privilege user principle is followed. o Do not open project files from untrusted sources. o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. 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.cisa.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.cisa.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. 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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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