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comp.lang.ruby

Taint mechanism

Olivier Sarrouy

7/2/2008 10:47:00 AM

Hi everyone,

I would like to ask a few question about the taint mechanism of ruby.

It seems that ruby taint mechanism doesn't care about indirect dataflow
to propagate the taint. For instance, if you got :

myVar1 = ARGV[0] <-- tainted

if myVar1 == "alice"
myVar2 = "Bob"
else
myVar2 = "Eve"
end

myVar2 should be tainted as there is an indirect dataflow from myVar1,
which is tainted, to myVar2. So I think it would be of a great thing to
be able to tackle indirect data flow, in order to be able to "prove"
some security properties on ruby programs.

Is this a choice from ruby core developers or would it be a potential
feature for the next ruby version ?


Thanks to all

Olivier
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