Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4007 Advisory (icsa-19-302-01) PHOENIX CONTACT Automation Worx Software Suite 30 October 2019 =========================================================================== 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: Mitigation CVE Names: CVE-2019-16675 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-302-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-302-01) PHOENIX CONTACT Automation Worx Software Suite Original release date: October 29, 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: Phoenix Contact o Equipment: Automation Worx Software Suite o Vulnerability: Improper Input Validation 2. RISK EVALUATION Successful exploitation of this vulnerability could compromise the availability, integrity, or confidentiality of an application programming workstation. Automated systems programmed using one of the affected products are not impacted. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of the Automation Worx Software Suite are affected: o PC Worx Versions 1.86 and prior o PC Worx Express Versions 1.86 and prior o Config+ Versions 1.86 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER INPUT VALIDATION CWE-20 A manipulated PC Worx or Config+ project file could lead to arbitrary code execution due to insufficient input data validation. CVE-2019-16675 has been assigned to this vulnerability. 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: Communications, Critical Manufacturing, Information Technology o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER 9sg Security Team working with Trend Micro's Zero Day Initiative reported this vulnerability to CISA. CERT@VDE coordinated this vulnerability with Phoenix Contact. 4. MITIGATIONS Phoenix Contact is in the process of developing an updated version of this product. Prior to receiving the updated version, Phoenix Contact strongly recommends users exchange project files using only secure file exchange services, and that project files should not be exchanged via unencrypted email. Phoenix Contact expects the next version of the Automation Worx Suite to be available prior to the end of 2019, noting the upcoming release of Automation Worx Software Suite will have a more robust validation of arrays regarding dimension and the number of elements allowed during input data conversion. In addition, input data validation will be extended in order to strengthen defenses against manipulated project files. Additional preventative security measures will be enabled for the compiler settings as well. 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 this vulnerability. - --------------------------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 iQIVAwUBXbjeLmaOgq3Tt24GAQjssg//efmaRDfW6ovESbsEunik0+ymI6ss5OVN lmc2ULpzyF1HyFTGEL7Abf2+JwbZ8iszy+LBTjyhBZ5AYzmiCgY1E9IkWyhg76Lv tvW2EHxKMK6azwtmaxPB/n9f9/RISLFaqt30deR6kZfrXyfOrGjx4u/THlvUy8bv 05ErJMKAYDRbGKi8JR/5RG8+N5p2a6sLxJZytqNID1eQyz6kFIgCjKmiFZxwMNUW EeTdAC/3+1MNfotklAE/BfZGwSJZe7RwGk+w8F8/gwidfy9UmwhYwTahBZopBqJ0 5YhXh66jTvdPkERD/h3jGLYRCfHQlsSPtysv6KSMIkAWsv1ZYyrqK+mIBEllhS9K YUclBKHtRNirJsPCWGHBN63h7TzGBrAXWft2xzrHfL/B79BxYsTdt8jp5TbSmOG9 NtqJpITbKAyqVqQB+ECh9aldmXyK2Dp6BA1i/CqXhJ1Oz43tiktmgqjDQ2zdZ7ec W793jT9nH/neZrOdMP0JbitH8gfvTKxO5A5Oc5G1c3BZeV5qMogGM6TtGclo1hRx lnpAHaxOc/iFmtl1VFXQ6sS4N7oLkrkUdRUOTfBtktySRTtRLJtPsf5Jy1SvQlEg Ar0FwjCjuJj5vvZ7yUxLwyYAVqrs/P4W3ujuASIm+qDiyiaArMtgrRCDPBKH9abT QFkEgWNLmfM= =0Xva -----END PGP SIGNATURE-----