on Fri, Nov 16, 2001 at 08:49:47AM -0600, measl@mfn.org (measl@mfn.org) wrote:
On Fri, 16 Nov 2001, A. Melon wrote:
Would someone please inform the recipient listed in the bounce message below, and his/her postmaster that GPG signatures in RFC 2015 MIME encoded form are not hazardous attachements?
Yeah, that's me.
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DishnetDSL SENDER NOTIFICATION
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has been stripped of all/certain attachments by DishnetDSL Mail server due to security reasons.
DishnetDSL allows only the following attachments:
1. .doc ^^^^ Maybe safe, depending on what produced it, and who recieves it. 2. .txt 3. .xls ^^^^ Oh yeah, *thats* secure!
4. .ppt 5. .pdf ^^^^ Usually OK, but...
There are some PDF exploits I've heard of, not sure if they're theoretical or not. Postscript itself is not immune, as it's an executable format itself. There's discussion I've heard of Postscript exploits which would be resident in printer networks. Powerpoint's also got its problems. ZIP is a panapoly which encompasses a whole slew of formats. And even good old .TXT is not secure if my understanding of MSFT filehandling is right. Associate .TXT with MS Word, add a .TXT extension to a MS Word file with a macro virus, and you're back to the root problem. A similar issue exists with RTF files if they're opened by MS Word by default -- the extension determines the application, but not the method(s) used for opening the file. I'm of the opinion that MIME has its uses. -- Karsten M. Self <kmself@ix.netcom.com> http://kmself.home.netcom.com/ What part of "Gestalt" don't you understand? Home of the brave http://gestalt-system.sourceforge.net/ Land of the free Free Dmitry! Boycott Adobe! Repeal the DMCA! http://www.freesklyarov.org Geek for Hire http://kmself.home.netcom.com/resume.html