KMC Controls created new firmware to mitigate authentication and cross-site request forgery (CSRF) vulnerabilities in its Conquest BACnet routers through its web interface, according to a report with ICS-CERT.

Maxim Rupp, the independent researcher that discovered the vulnerabilities, tested the new firmware to validate that it resolves the vulnerabilities.

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These vulnerabilities are remotely exploitable.

BAC-5051E routers, firmware versions prior to E0.2.0.2 suffer from the issues.

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An unauthorized user can exploit these vulnerabilities to read the configuration of the target device.

KMC Controls is based in New Paris, IN. The affected products, BAC-5051E routers, see use mainly in building automation systems. BAC-5051E routers see action in commercial facilities. KMC Controls estimates that these products are used in the Americas, the Middle East, and Southeast Asia.

An unauthorized user can use a CSRF attack to read configuration data from a file.

CVE-2016-4494 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 5.3.

In addition, a missing authorization check allows an unauthorized user to read configuration data from a file.

CVE-2016-4495 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 5.3.

No known public exploits specifically target these vulnerabilities. However, an attacker with a low skill would be able to exploit these vulnerabilities.

KMC Controls released firmware Version E0.2.0.2 for the BAC-5051E router to add additional security for web-based access to the router’s configuration pages. KMC Controls recommends all BAC-5051E routers should upgrade to this version. Users can obtain the latest version of the firmware in the KMC Controls partner portal, which requires a login.

The BAC-5051E router is not intended to be a public facing Internet device. For best security, install the router behind a firewall inside a site’s intranet network. KMC Controls has also sent a copy of its technical bulletin to users. A copy of this bulletin can be found on KMC Controls’ web site in the service bulletin section.

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