G.W. Haywood wrote: > Hello again, > > On Wed, 17 May 2007 Dennis Peterson wrote: > >>>> ... I also don't scan (or accept) most file formats declared unsafe >>>> by Microsoft. >>> How do you determine this? >> From Microsoft's web page: >> http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262631 > > Um, aren't they just file extensions? (You said formats. :) > > I thought maybe you were using some sort of file magic.
If we're going to be precise, it would be file formats implied by file extensions. You can't block extensions (continuing to be precise just for you :) ) because they have no physical manifestation. It would be nice if Microsoft had used "magic numbers" as found in other operating systems to simplify the identification of various file formats but they didn't so we do what we can with what they've given us and scan the rest. There's hours of entertaining reading about the problem here: http://en.wikipedia.org/wiki/File_format dp _______________________________________________ Help us build a comprehensive ClamAV guide: visit http://wiki.clamav.net http://lurker.clamav.net/list/clamav-users.html
