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To account for the risk of the update failing, users should have a copy of Chrome OS recovery media close by, the page said.įor more information on how to determine if a specific firmware version is impacted, and for step by step instructions for installing the update, consult the Chromium page. Users and admins that need to perform this update should back up any important data (preferably in multiple places) before proceeding with the update. This includes disk encryption keys, implying all user data stored locally on the device will be lost," the page said. This means that all data held by the TPM will be discarded. "Installing the TPM firmware update requires a hardware reset of the TPM chip. As such, Google has made the update optional, the page said.
What's worse is that, if a user wants to run the update to account for the vulnerability, they will need to wipe their local user data to do so.
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A full list of affected devices can be found here. "With the exception of older devices that use the Infineon SLB 9635 TPM, all Chrome OS devices that include an Infineon TPM chip are affected," the Chromium page said. Chromebooks aren’t just about Chrome OSthey’re about the total package of a computer with a simple operating system. Chromebooks are designed to be simple, lightweight, and get updates directly from Google.
However, some targeted attacks are possible, the page said. The Chrome OS software is made for Chromebooks. The attack is very limited and cannot be carried out at scale, as it takes 140.8 CPU years to break a single encryption key, according to the Chromium page. SEE: System update policy (Tech Pro Research) It also shows that, with the right exploit, some encryption can eventually be broken. The vulnerability is important because it shows that, while typically secure, thin clients and zero clients still present some risk to an enterprise organization. The update specifically fixes a Trusted Platform Module (TPM) firmware vulnerability that allows hackers to extract encrypted data. While the update was originally detailed in a Chromium project page in October 2017, it was further explained in a Sunday post from Android Police.
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