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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2282 Multiple vulnerabilities have been identified in Delta Electronics CNCSoft and ScreenEditor 8 August 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Delta Electronics CNCSoft and ScreenEditor Publisher: ICS-CERT Operating System: Windows Impact/Access: Administrator Compromise -- Remote with User Interaction Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-10636 CVE-2018-10598 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-18-219-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-18-219-01) Delta Electronics CNCSoft and ScreenEditor Original release date: August 07, 2018 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 CVSS v3 8.8 ATTENTION: Exploitable remotely/low skill level to exploit Vendor: Delta Electronics Equipment: CNCSoft and ScreenEditor Vulnerabilities: Stack-based Buffer Overflow, Out-of-Bounds Read 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to gain remote code execution with administrator privileges. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS According to Delta Electronics, the following products are affected: CNCSoft Version 1.00.83 and prior, and the accompanying, ScreenEditor Version 1.00.54 3.2 VULNERABILITY OVERVIEW 3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121 Multiple stack-based buffer overflow vulnerabilities cause the software to crash due to lacking user input validation before copying data from project files onto the stack. CVE-2018-10636 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). 3.2.2 OUT-OF-BOUNDS READ CWE-125 Two out-of-bounds read vulnerabilities cause the software to crash due to lacking user input validation for processing project files. CVE-2018-10598 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: Taiwan 3.4 RESEARCHER Mat Powell working with Trend Micros Zero Day Initiative reported these vulnerabilities to NCCIC. 4. MITIGATIONS Delta Electronics recommends the following: Update to the latest version of CNCSoft, v1.01.09. The updated version can be found at: http://www.deltaww.com/Products/PluginWebUserControl/downloadCenterCounter.aspx?DID=84&DocPath=1&hl=en-US Restrict the interaction with the application to trusted files. NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls, and isolate them from the business network. When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. Contact Information For any questions related to this report, please contact the NCCIC at: Email: NCCICCUSTOMERSERVICE@hq.dhs.gov Toll Free: 1-888-282-0870 For industrial control systems cybersecurity information: http://ics-cert.us-cert.gov or incident reporting: https://ics-cert.us-cert.gov/Report-Incident? The NCCIC 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW2osnmaOgq3Tt24GAQiWCA/+L1LGusGXC+Q+HQ6tIBdVlXz4HaXh0Oza cH1jfGTOStguTaqpQut0+xkWGbFKPAZkHKwCund+JulzhBdoHhoPZYVAnxrANJVC qr+cWQpKizvzW/OpNNi1SAtn9UtgdAFTkm3F9zf8oiJh2SxSLKV7CguzBHVkvqwi EcWeND67IBPKTsjS7TKdw0mKZ1ndI2Rvy0lOlh4Uq3bF4KER3Cn/z/uqoviqd0hc mCise6BzF8QuXqIdgVP67tiC8NsP/YSRmD0pWB6oP7YqXzPrZDTs7B/sxHhcaTZY cEezVzGSPgRvC2j7WAzcc7ATynNXzq5AMLA576xbPrMvHIHZnefZe9FGQ9oR04cN i5Hin1oabS9ZTWuF5c8k9JqIYozObFa0jWkOktzeKs/z4OkPh4xyd0+6K/DCgmR3 BSsXNdiq26s/1xikuD8/+CQw3hK2luVj/JmGrStb8+v552OdTPx2gPI+aMJdWrpW 4Zhnxtb6eAYJyyStDyFTiOdRr3NuSEnqWpWZ7eR/qTgwaeca3dyvXo48ASWbFDXk quJJhvoBp1Mau79jwor5LdV2KVMPCnePOZgbJsRcjfG273Ir5gnVN6tDsAZIyCQx fVniPESQg5eQPosDwBbQ4iI8082NOqbfSBtxag/7iANo8rqaChqd4t9fsUS3l/ed I0j3aiWhwLE= =bd2H -----END PGP SIGNATURE-----