So it sounds like if you don't sideload apps you would not be at risk, correct?
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This is just polluting the namespace and making it harder for blue teamers and incident responders to share IOCs.
His repos either lack a PoC and just contain a README with more emojis than facts; try to pass a public version checker off as a PoC; or invent a non-working PoC in the absence of technical details.
Bullshit asymmetry.
It has to do with setting the device owner, and gaining those powers; enabling / disabling apps, remote wipe, etc.. It's a local privilege escalation attack and doesn't require user interaction.
In particular they're usually f-droid and open source apps compiled by f-droid.