Firmware Fix for Photovoltaic System

Thursday, December 20, 2012 @ 01:12 PM gHale


There are now mitigation details for multiple vulnerabilities that affect the Carlo Gavazzi EOS-Box Photovoltaic Monitoring System, according to a report on ICS-CERT.

Carlo Gavazzi produced a firmware update that fully resolves these remotely exploitable vulnerabilities. A successful exploitation of the vulnerabilities would allow an attacker to gain unauthorized access, access private information, and execute remote code. This device sees use in the energy sector.

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EOS-Box is the Carlo Gavazzi device with firmware version prior to 1.0.0.1080_2.1.10 suffers from the issue.

Attackers could use the vulnerabilities to exploit the device by gaining unauthorized access in the system, leaking stored information, and remotely executing code on the device. This could allow a loss of availability, integrity, and confidentiality of the affected system. Carlo Gavazzi products generally see use in industrial automation and energy systems.

Carlo Gavazzi Automation is an Italian-based company that maintains offices in several countries around the world, including the United States.

The affected product, EOS-Box, is an embedded PC that supervises photovoltaic plants, operating as an integrated control system. The EOS-Box goes across the renewable energy sector. Carlo Gavazzi said these products mainly see use in the United States, Canada, Europe, and Asia.

The Carlo Gavazzi device stores hard-coded passwords in the PHP file of the device. By using the hard-coded passwords, attackers can log into the device with administrative privileges. This could allow the attacker to have unauthorized access. CVE-2012-6428 is the number assigned to this vulnerability, which has a CVSS v2 base score of 10.0.

In addition, the Carlo Gavazzi device does not check the validity of the data before executing queries. By accessing the SQL table of certain pages that do not require authentication, attackers can leak information from the device. This could allow the attacker to compromise confidentiality. CVE-2012-6427 is the number assigned to this vulnerability, which has a CVSS v2 base score of 7.8.

Exploits that target these vulnerabilities are publicly available and an attacker with a low skill would be able to exploit these vulnerabilities.

Carlo Gavazzi developed a new firmware Version 1.0.0.1080_2.1.10 that mitigates these vulnerabilities. Carlo Gavazzi released the new firmware December 18 directly to the devices. Users will be able to manually download the firmware on their device by using the Firmware Update function in the System Menu in the device’s Web interface.



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