PHOENIX CONTACT Automation Worx Software Suite

# ICS Advisory (ICSA-19-171-01) ## PHOENIX CONTACT Automation Worx Software Suite Original release date: June 20, 2019 | Last revised: August 05, 2019 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-171-01) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-171-01) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-19-171-01) ### Legal Notice All information products included in [https://us-cert.gov/ics](/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/](/tlp/). * * * ## 1\. EXECUTIVE SUMMARY * **CVSS v3 7.5** * **ATTENTION:** Exploitable remotely/low skill level to exploit * **Vendor:** Phoenix Contact * **Equipment:** Automation Worx Software Suite * **Vulnerabilities:** Access of Uninitialized Pointer, Out-of-bounds Read, Use After Free ## 2\. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker, with access to an original PC Worx or Config+ project file, to perform remote code execution. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following components of Automation Worx Software Suite Version 1.86 and earlier are affected: * PC Worx * PC Worx Express * Config+ ### 3.2 VULNERABILITY OVERVIEW #### 3.2.1 [ACCESS OF UNINITIALIZED POINTER CWE-824](https://cwe.mitre.org/data/definitions/824.html) An access of uninitialized pointer vulnerability may allow remote code execution. [CVE-2019-12870](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12870) 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](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/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](https://cwe.mitre.org/data/definitions/125.html) An out-of-bounds read vulnerability may allow remote code execution. [CVE-2019-12869](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12869) 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:N/UI:R/S:U/C:L/I:N/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)). #### 3.2.3 [USE AFTER FREE CWE-416](https://cwe.mitre.org/data/definitions/416.html) A use after free vulnerability may allow remote code execution. [CVE-2019-12871](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12871) 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](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTORS:** Critical Manufacturing * **COUNTRIES/AREAS DEPLOYED:** Worldwide * **COMPANY HEADQUARTERS LOCATION:** Germany ### 3.4 RESEARCHER 9sg Security Team working with Trend Micro's Zero Day Initiative reported these vulnerabilities to CISA. CERT@VDE coordinated these vulnerabilities with Phoenix Contact. ## 4\. MITIGATIONS Phoenix Contact is currently working on the next version of the Automation Worx Software Suite. This advisory will be updated with details of the new version when it becomes available. Phoenix Contact recommends users exchange project files using only secure file exchange services, and that project files should not be exchanged via unencrypted email. CISA also recommends users take the following measures to protect themselves from social engineering attacks: * Do not click web links or open unsolicited attachments in email messages. * Refer to [Recognizing and Avoiding Email Scams](https://www.us-cert.gov/sites/default/files/publications/emailscams_0905.pdf) for more information on avoiding email scams. * Refer to [Avoiding Social Engineering and Phishing Attacks](https://www.us-cert.gov/ncas/tips/ST04-014) 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](https://www.us-cert.gov/ics/Recommended-Practices) on the ICS webpage on [us-cert.gov](https://www.us-cert.gov/). Several recommended practices are available for reading and download, including [Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies](https://www.us- cert.gov/sites/default/files/recommended_practices/NCCIC_ICS- CERT_Defense_in_Depth_2016_S508C.pdf). Additional mitigation guidance and recommended practices are publicly available on [the ICS webpage on us-cert.gov](https://www.us-cert.gov/ics) in the Technical Information Paper, [ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies](https://www.us-cert.gov/ics/tips/ICS- TIP-12-146-01B). 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.