not mentioning that there are actualy two
pieces of data there that need untainting: one is the domain
parameter obtained from the CGI, but the other is the PATH
of your program. If you use backticks like that, and don't set up your PATH
explicitly, perl -T
That appears not to make sense in a CGI environment, but it makes a lot of sense when you're writing setuid root scripts that can be run from the command line.
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