Upcoming Critical PHP Security Release

The demo video has been going around Twitter today and apparently the proof of concept is privately being shared around too. The video shows pasting something in the URL and then gaining a shell on the server. It looks completely catastrophic.

I think the best course of action is to just shut your server down before the patch goes live and then bring it back after you have patched.

A lot of people are going to be up late on account of this.

There is a temporary mitigation! https://twitter.com/k_firsov/status/2112718728232329240

php.ini:

    session.upload_progress.enabled = Off

No hints as to what versions are affected?

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