Getting Admin

The next stage of the Quarantine series.

I noticed that our session cookie was a JWT, signed with HS256.

A vulnerability exists where these tokens can have their signing algorithm set to 'none' and their signature removed, and the web app will accept and process it.

I used the highly useful jwt_tool to resign it, editing my 'privilege' value from '1' to '10'.

This allowed me access to the admin panel (more of a single page).


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