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That attack isn't a problem unless he was talking directly to the receiving mail server over SMTP. sendmail will encode the period and unless the receiving mail server is completely broken, the message will just have some SMTP commands in it.

Update: I forgot about the -i flag to sendmail to prevent the rogue period from ending the message. The SMTP commands shouldn't be interpreted by sendmail but the period can be used to shorten the message sent.


In reply to Re: Re: Vetting a CGI script by iburrell
in thread Vetting a CGI script by dvergin

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