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Re: [ietf-dkim] ISSUE: 4871bis - Security Loop hole with Multiple 5322.From

2010-10-07 06:04:11
On Wed, 06 Oct 2010 13:25:28 +0100, Murray S. Kucherawy  
<msk(_at_)cloudmark(_dot_)com> wrote:

-----Original Message-----
From: ietf-dkim-bounces(_at_)mipassoc(_dot_)org  
[mailto:ietf-dkim-bounces(_at_)mipassoc(_dot_)org] On Behalf Of Charles 
Lindsey
Sent: Wednesday, October 06, 2010 3:47 AM
To: DKIM
Subject: Re: [ietf-dkim] ISSUE: 4871bis - Security Loop hole with  
Multiple 5322.From

And note that pious exhortations to ensure that RFC5322 be followed, or
that MUAs should be fixed to solve this problem, are no solution. We  
live
in the Real World (TM), and neither of those things is going to happen,
desirable as they might be.

If we can't rely on people to provide valid input when admonished to do  
so, then there's no point in continuing any of this work.

Well it is a plain fact that lots of mail non conforming to RFC 5322 is  
floating around, and nearly all MUAs are accepting it on the grounds of  
"being liberal in what they accept". So it is clear that we cannot "rely  
on people" as you suggest. And for sure you cannot expect phishers to heed  
any admonishments whatsoever.

And yet we must develop systems that are secure in spite of all that.

-- 
Charles H. Lindsey ---------At Home, doing my own thing------------------------
Tel: +44 161 436 6131                       
   Web: http://www.cs.man.ac.uk/~chl
Email: chl(_at_)clerew(_dot_)man(_dot_)ac(_dot_)uk      Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K.
PGP: 2C15F1A9      Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 AB A5
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