Meet SH1mmer, the big bad Chromebook exploit no one is talking about

guest · Jan 30, 2023

By Dean Howell - January 30, 2023

There are presumably tens of millions of enterprise-managed Chromebooks in the wild, and that makes them an attractive target for hackers. The recent discovery of the SH1MMER exploit is causing concern for many organizations that rely on Chromebooks for their daily operations.
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SH1MMER (Shady Hacking 1nstrument Makes Machine Enrollment Retreat) is a potentially dangerous exploit capable of completely unenrolling enterprise-managed Chromebooks from their respective organizations, but useful for Chromebook owners who want to use the operating system while still maintaining their privacy. It was discovered by the Mercury Workshop team and was released on Friday, January 13th, 2023 (Friday the 13th but has mostly flown under the radar). We're unsure if the release date is a publicity stunt is merely a coincidence.

The exploit takes advantage of the ChromeOS shim kernel, specifically modified RMA factory shims, to gain code execution at recovery. RMA shims are factory tools that allow certain authorization functions to be signed, but only the KERNEL partitions are checked for signatures by the firmware.
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In conclusion, the SH1MMER exploit is a significant threat to enterprise-managed Chromebooks but can be a boon for hobbyists and Chromebook owners who want to get their hands dirty and truly own their devices.

Source: https://sh1mmer.me/
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Meet SH1mmer, the big bad Chromebook exploit no one is talking about

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