Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2365 Advisory (icsa-20-191-01) Phoenix Contact Automation Worx Software Suite 13 July 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Phoenix Contact Automation Worx Software Suite Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-12498 CVE-2020-12497 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-20-191-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-20-191-01) Phoenix Contact Automation Worx Software Suite Original release date: July 09, 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 7.8 o ATTENTION: Low skill level to exploit o Vendor: Phoenix Contact o Equipment: Automation Worx Software Suite o Vulnerabilities: Stack-based Buffer Overflow, Out-of-Bounds Read 2. RISK EVALUATION Successful exploitation could allow an attacker to execute arbitrary code under the privileges of the application. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following components and versions of Automation Worx Software Suite are affected: o PC Worx version 1.87 and prior o PC Worx Express version 1.87 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121 Due to insufficient input data validation while processing project files the buffer could be overflown. An attacker could use a specially crafted project file to exploit and execute code under the privileges of the application. CVE-2020-12497 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 ). 3.2.2 OUT-OF-BOUNDS READ CWE-125 Insufficient input data validation while processing project files could result in an out-of-bounds read. An attacker could use a specially crafted project file to exploit and execute code under the privileges of the application. CVE-2020-12498 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: Communications, Critical Manufacturing, Information Technology o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Natnael Samson and mdm, working with Trend Micro Zero Day Initiative, reported these vulnerabilities to CISA. 4. MITIGATIONS Phoenix Contact recommends users exchange project files only using secure file exchange services. Project files should not be exchanged via unencrypted email. In addition, we recommend exchanging or storing project files together with a checksum to ensure their integrity. With the next version of Automation Worx Software Suite, a sharpened input data validation, with respect to buffer size and description of size and number of objects referenced in a file, will be implemented. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o 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. 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. 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXwvkweNLKJtyKPYoAQjQ4BAAkKIvtAlSNHG/RijllImHydCeJlqBf8Wv RtFrYUUz3yndOBkbp3y0/LfiDf1blXskegspq+K4rXv5XtEdaBn8yl9A4/YE8t0F Vavaw1OPs5U6O1VjD4t+PfO2xUYcsutZuvDtCaV90Y8szz6dR9Wgn8ALElO1AFIC TlM27Fc0/B+BmV32pp8okNywb0kvfrdSdg4PO7Z1CtiSlH5VZ3cL4s3JQ1YRDLDW V8yO/9EDxLTH1v6hAZP/OxPwQgO7ZZBF7z/UJjwU4UyQOCJ87MA/yTNjWtCPqNkV GMlS4SSFGHncpxr6Jt1g/7YsnQHGMDsfDxfm39I36H0wShehU2zv3ApxSXVKCVk9 Oc37JXeksI1K5jmwn8jcMZLswHMw4M5JakwoWsbG4/wupjn7OeEKZxv4LllVU8uH +v9HHaj97Lh/MosmRkn8dlzn3SXO7oCmdfqN5PRtSSw5azKFgRkOxgV1hFJfZnYx j7Z/kYy/sL4GOqIpo5WyYWlnUxtTypMuJkUXpHNMGtU/3aMvvwf48oMl+ECrYo0S I/k4hgFBQf7W1FDEqhxmuxkaXBU4Ze3RQjA5KJy9koP+4d0j54EL+Q8D/Pf9nUoQ XaNTqovv4SORgq5sV/3qIwd5LAnkEY5ea9OrLX/3QuAQHb4WOKAy3q+Yzk4/+z+R 3vXsFOq+Bf0= =yNhk -----END PGP SIGNATURE-----