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August 2008
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2008.08.31 22:01 "Re: Some security fixes from RHEL", by Bob Friesenhahn
On Sun, 31 Aug 2008, Toby Thain wrote: > >> Hylafax is used on tiff files recieved from fax machines on the other >> end. Some malicious user might send invalid tiff files. > > All of your other examples are reasonable, but this one is practically > impossible, as the fax protocol does not transfer "a TIFF file" per se, but > is an extremely narrowly defined protocol with extensive verification and > handshaking. TIFF is only a convenient wrapper, created post facto, for the > verified compressed multipage transmission. In other words, afaik, you can't > insert "an arbitrary TIFF" in the sending end of the call and expect that to > pop out the other end. Except for faxes delivered as TIFF files via the Internet. Hylafax has a much narrower focus than the other packages mentioned. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/