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Taint mode does not help against null bytes (or any other bytes) in your read_file "$page.html" example. Reads are not checked for tainted data. Writes are though, so write_file "$page.html" would've been stopped by the -T switch.

In short, I'd like to add this: Don't think -T will do the job for you! Just think it may help you if you slipped up.

ihb

See perltoc if you don't know which perldoc to read!
Read argumentation in its context!


In reply to Re: Security techniques every programmer should know by ihb
in thread Security techniques every programmer should know by Juerd

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    erix .oO( apparently but does not GotToBFast )
    [Discipulus]: now i must come back to my house/hoven monks: dont do interesting discussion in my absence!
    [erix]: or apparently, now it does :)
    [GotToBTru]: heh
    erix prods ambrus to (re-)start cbstream...
    [GotToBTru]: I've got a program with an if ... or ... statement with 80 clauses
    [stevieb]: 80 clauses? dispatch table?
    [GotToBTru]: no, lookup
    [stevieb]: no, I mean have you considered using a dispatch table. an 80 condition if/else is huge :)
    [GotToBTru]: that is how this should have been done, no question

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