Valdis.Kletnieks at Valdis.Kletnieks at
Sat May 26 19:14:47 UTC 2001

On Sat, 26 May 2001 10:48:48 EDT, Mitch Halmu said:

> Besides interoperability concerns with current software that will have
> to become 'legacy', you will open the gates to any hacker and script
> kiddie that can now mail you their favorite virus, trojan or worm just
> as is was compiled. It's bad enough that unprintable characters and
> buffer overflows in the header must be neutered. Scary stuff that you
> haven't even thought of could happen with 8 bit message bodies...

FUD.  Complete and total FUD.

There's *NO* change in what can be transferred.  The ONLY difference is you
can avoid converting it to base64 at the one end and then decoding it at
the other end.  If you haven't noticed, viruses, trojans, and worms are being
transmitted just as were compiled, via the *current* infrastructure.

And the need for neutering characters in the header was recognized in
RFC1342, 10 years ago.

And 8 bit message bodies have been supported by Sendmail since 8.7,
all the way back in 1996.  The only thing that BDAT buys you over the
currently existing and *widely* deployed 8bitmime support (where Sendmail
will even automatically upgrade/downgrade from 8bit to 7bit using either
quoted-printable or base64, on a configurable basis), is that 8bitmime
is still bound by the 1000-char line length restriction in SMTP, where
you need a CR-LF pair at least every 998 characters.

BDAT doesn't open any exposures other than programmers that can't get
a length-data encoding right.  Hmm.. maybe we *should* worry... ;)
				Valdis Kletnieks
				Operating Systems Analyst
				Virginia Tech

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 211 bytes
Desc: not available
URL: <>

More information about the NANOG mailing list