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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3443 Multiple vulnerabilities have been identified in Delta Electronics TPEditor 11 September 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Delta Electronics TPEditor Publisher: ICS-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-13544 CVE-2019-13540 CVE-2019-13536 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-253-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-253-01) Delta Electronics TPEditor Original release date: September 10, 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 7.8 o ATTENTION: Low skill level to exploit o Vendor: Delta Electronics o Equipment: TPEditor o Vulnerabilities: Stack-based Buffer Overflow, Heap-based Buffer Overflow, Out-of-bounds Write 2. RISK EVALUATION Successful exploitation of these vulnerabilities may allow information disclosure, remote code execution, or may crash the application. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of TPEditor, a programming software for Delta text panels, are affected: o TPEditor Versions 1.94 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121 Multiple stack-based buffer overflow vulnerabilities may be exploited by processing specially crafted project files, which may allow an attacker to remotely execute arbitrary code. CVE-2019-13540 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U /C:H/I:H/A:H ). 3.2.2 HEAP-BASED BUFFER OVERFLOW CWE-122 Multiple heap-based buffer overflow vulnerabilities may be exploited by processing specially crafted project files, which may allow an attacker to remotely execute arbitrary code. CVE-2019-13536 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U /C:H/I:H/A:H ) 3.2.3 OUT-OF-BOUNDS WRITE CWE-787 Multiple out-of-bounds write vulnerabilities may be exploited by processing specially crafted project files, which may allow remote code execution. CVE-2019-13544 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; 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 kimiya of 9sg Security Team working with Trend Micro's Zero Day Initiative (ZDI) reported these vulnerabilities to CISA. 4. MITIGATIONS Delta Electronics recommends affected users update to the latest version of Delta Industrial Automation TPEditor, Version 1.95, which is available for download at: http://www.deltaww.com/services/DownloadCenter2.aspxsecID=8&pid=2&tid=0&CID=06 &itemID=060302&typeID=1&downloadID=&title=&dataType=8;&check=1&hl=en-US Delta Electronics also recommends affected users restrict the interaction with the application to trusted files. CISA 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.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. 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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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