[LRUG] Ruby prison escape challenge

[Paul Battley]

That was fun. I used a similar tactic, but couldn't get below 50
(hint: you can save one byte because you don't need a space before a
symbol argument).

Unfortunately, someone has properly hacked it and removed the
scoreboard data. You could coax the app into revealing the database
connection details pretty easily.

P

On 11 July 2018 at 13:52, Stephen Best <bestie at gmail.com> wrote:
> That was really fun, thanks for sharing! Unfortunately I'm getting an
> application error when I submit.
>
> Copying the runtime code you provided I can say this solution "works on my
> machine" :D
>
> I managed 51 chars. Will you be sharing the solutions soon?
>
> I've copied Rob's very considerate spoiler mitigation tactic
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> u=prison.method :unlock;u.curry[11]["secret"][self]
>
> On Wed, 11 Jul 2018 at 14:08, Rob Miller <rob at bigfish.co.uk> wrote:
>>
>> Nice challenge! Best I can do is 87, thought I suspect there’s a much
>> cleverer approach that I haven’t thought of…
>>
>> My solution (after a few linebreaks so people can ignore spoilers if they
>> want to):
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>> payload = Class.new{def
>> to_str;caller[0]=~/m/?"":"prison.send(:unlock,22,'secret',self)"end;}.new
>>
>> On 11 Jul 2018, at 11:23, Marek L wrote:
>>
>> Hello, lrug-ers.
>> Hope you are enjoying summer and Ruby.
>> I have created a small fun challenge that I thought you may enjoy as well.
>>
>> https://ruby-prison-break.herokuapp.com/escapes/new
>>
>> So far, Matz broke it with incredible 49 characters!
>> Happy hacking and feel free to share.
>> Marek
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