Reliable Controls MACH-ProWebCom/Sys

# ICS Advisory (ICSA-19-353-04) ## Reliable Controls MACH-ProWebCom/Sys Original release date: December 19, 2019 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-19-353-04) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-19-353-04) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2Ficsa-19-353-04) ### 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 8.2** * **ATTENTION:** Exploitable remotely * **Vendor:** Reliable Controls * **Equipment:** MACH-ProWebCom/Sys * **Vulnerability:** Cross-site Scripting ## 2\. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to execute commands on behalf of the affected user. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following versions of MACH ProWebCom/Sys, a web enabled building controller, are affected: * MACH-ProWebSys: All versions prior to 2.15 (Firmware versions prior to 8.26.4) * MACH-ProWebCom: All versions prior to 2.15 (Firmware versions prior to 8.26.4) ### 3.2 VULNERABILITY OVERVIEW #### 3.2.1 [IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79](https://cwe.mitre.org/data/definitions/79.html) An authenticated user clicking on a malicious link may allow an attacker to execute commands on behalf of the affected user. [CVE-2019-18249](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18249) has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is ([AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTORS:** Commercial Facilities * **COUNTRIES/AREAS DEPLOYED:** Worldwide * **COMPANY HEADQUARTERS LOCATION:** Canada ### 3.4 RESEARCHER Gjoko Krstic of Applied Risk reported this vulnerability to CISA. ## 4\. MITIGATIONS Reliable Controls has released MACH-ProWebCom/Sys firmware revision 8.26.4 and software revision 2.15 to resolve the vulnerability. The updated software can be obtained at the following link: [MACH-ProWebCom/Sys firmware revision 8.26.4](https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.reliablecontrols.com%2Fsupport%2Ffirmware%2Freleases.php&data=02%7C01%7Cscott.southwick%40inl.gov%7Ce0f4a319100d45b7b87e08d77d966c72%7C4cf464b7869a42368da2a98566485554%7C0%7C1%7C637115957340128800&sdata=xFoSdyboZ7PLFFqBW3MaI78DKXD8242m60pNhdNOVII%3D&reserved=0) (login required). CISA 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. 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 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). No known public exploits specifically target this vulnerability. High skill level is needed to exploit.