Digi ConnectPort LTS 32 MEI

# ICS Advisory (ICSA-20-042-13) ## Digi ConnectPort LTS 32 MEI Original release date: February 11, 2020 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-20-042-13) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-20-042-13) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-20-042-13) ### 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 2.4** * **ATTENTION** : Exploitable remotely/low skill level to exploit * **Vendor** : Digi International * **Equipment** : ConnectPort LTS 32 MEI * **Vulnerabilities** : Unrestricted Upload of File with Dangerous Type, Cross-site Scripting ## 2\. RISK EVALUATION Successful exploitation of these vulnerabilities could limit system availability. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following versions of ConnectPort LTS 32 MEI, which provides serial over Ethernet connectivity, are affected: * ConnectPort LTS 32 MEI: firmware Version 1.4.3 (82002228_K 08/09/2018), bios Version 1.2 ### 3.2 VULNERABILITY OVERVIEW #### 3.2.1 [UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434](https://cwe.mitre.org/data/definitions/434.html) Successful exploitation of this vulnerability could allow an attacker to upload a malicious file to the application. [CVE-2020-6975](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6975) has been assigned to this vulnerability. A CVSS v3 base score of 2.4 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N)). #### 3.2.2 [IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79](https://cwe.mitre.org/data/definitions/79.html) Multiple cross-site scripting vulnerabilities exist that could allow an attacker to cause a denial-of-service condition. [CVE-2020-6973](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6973) has been assigned to this vulnerability. A CVSS v3 base score of 2.4 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTORS** : Commercial Facilities, Critical Manufacturing, Food and Agriculture, Healthcare and Public Health, Transportation Systems * **COUNTRIES/AREAS DEPLOYED** : Worldwide * **COMPANY HEADQUARTERS LOCATION** : United States ### 3.4 RESEARCHER Murat Aydemir, Critical Infrastructure Penetration Test Specialist at Biznet Bilisim A.S., and Fatih Kayran, Penetration Test Specialist at Biznet Bilisim A.S., reported these vulnerabilities to CISA. ## 4\. MITIGATIONS Digi recommends users upgrade to the mandatory release of ConnectPort LTS Version 1.4.5, released on November 8, 2019. Digi International recommends the following best practices: * Test the new release in a controlled environment with your application before you update production devices. * Unless otherwise noted, apply updates in the following order: 1. Device firmware 2. Modem firmware 3. Configuration 4. Application If you prefer manually updating one device at a time, follow these steps from the manual: [Firmware update process](https://www.digi.com/resources/documentation/digidocs/pdfs/90000301-88.pdf) Contact the Digi Technical Support team at <https://www.digi.com/support> to find out more on this release. CISA 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](https://www.us-cert.gov/ics/alerts/ICS-ALERT-10-301-01). * 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. 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/ics). 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. 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. No known public exploits specifically target these vulnerabilities.