Chrome100 is a directory of recovery images for Google's operating system Chrome OS.
Chrome OS recovery images are a necessity for any IT admins or a Chrome OS hobbyist. Chrome OS recovery images can be used to repair broken installs of Chrome OS, bypassing being pinned to an outdated version of Chrome OS, or more desirably: downgrading to an earlier version of Chrome OS.
Downgrading Chrome OS may be done in order to continue using a deleted feature, patched bug, or to avoid a new feature. This opens the door to many patched CVEs and exploits being used, despite being patched in newer versions of Chrome OS.
Yes. Although your IT admin may notice you're on an earlier version of Chrome OS (which often goes unnoticed).
RMA shims are disk images stored on USB devices that contain a combination of the ChromeOS factory bundle components used to reinstall the operating system and tools for performing repair and diagnostics.
The Sh1mmer exploit uses publicly leaked RMA shims to modify the management of enrollment of devices. It allows users to unenroll enterprise-managed Chromebooks and bypass device restrictions. It was developed by security researchers from the Mercury Workshop Team.
For more information, see sh1mmer.me.
See the guide.