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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2304 Advisory (icsa-21-182-03) Delta Electronics DOPSoft 2 July 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Delta Electronics DOPSoft Version 4.0.10.17 and prior Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Access Confidential Data -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-27455 CVE-2021-27412 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-182-03 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-182-03) Delta Electronics DOPSoft Original release date: July 01, 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 7.8 o ATTENTION: Low attack complexity o Vendor: Delta Electronics o Equipment: DOPSoft o Vulnerabilities: Out-of-bounds Read 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow arbitrary code execution and disclose information. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of DOPSoft, a software supporting the DOP-100 series HMI screens, are affected: o DOPSoft Version 4.0.10.17 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 OUT-OF-BOUNDS READ CWE-125 The affected product is vulnerable to an out-of-bounds read while processing project files, which may allow an attacker to disclose information. CVE-2021-27455 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/ C:L/I:N/A:N ). 3.2.2 OUT-OF-BOUNDS READ CWE-125 The affected product is vulnerable to an out-of-bounds read, which may allow an attacker to execute arbitrary code. CVE-2021-27412 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/ I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Taiwan 3.4 RESEARCHER Natnael Samson (@NattiSamson), working with Trend Micro's Zero Day Initiative, reported these vulnerabilities to CISA. 4. MITIGATIONS Delta Electronics has released an updated version of DOPSoft and recommends users install this update on all affected systems. CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. CISA also recommends users take the following measures to protect themselves from social engineering attacks: 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 these vulnerabilities. These vulnerabilities are 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 iQIVAwUBYN5kdeNLKJtyKPYoAQh0GRAAmEXtwsKB1QASu3q9/aXi9xbLpowd7BFf z8MzB6KYLcjP8jMukKNYk4eTrZCdR0Yw8qB265rj4cTAkl0rKGos2QkJT64X0YiC YWVTc+2rWLan+cjw2kGOZoPe00BhcMzuAH3yAAg855C/H9GRESc9xTJMZBGafeEm 8BV8xUD9CpOl0oISlnrB4h9soM/fw8XeLUOC7ARr3hHuPexICEE1lX8FZgAW41Zx ExoKWt7IvJnzcxNG6ZWryZHt22h9h7tV2vj1l4X+M3LduF2ufPiDmCY/ZKTL3eyu diL7ZhEpvsU7CuiHtlI0wdWC7d22elj3VhR0OQLhh5k8Fde22pIfyJeUV22pmjkh hoxRRZsu7oBFUUoI/P3aHWFuQcb0a3OK5b7k0QEHC/x3de85uH5wMuQTpEW3Lyk8 moqbPutpVhU2zZymBMKHj3GC0nTE7Rt2Nbz4FW9BClpOPM9ulc0BAT41/OiRfksU hMe+H8isi8bSe1k3DhlNSTzQXpHue6E1bQiGOFCpX9+rebEtBdxIO9d097e8jgH7 kPvBHMTvLkj6iItrfDlfr9gnXxDTXYboIOMbXTbs7ayO+epqQ6qymzQcZA7bvsVq 7F4NNapnMiquLh7vZBwP/QfUV2A2PbwPAGSIQoq3ZSMpfNUgdluN/OnScHm9Wwxk cAWJ5Oo5r2g= =oCo/ -----END PGP SIGNATURE-----