Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-27 Thread Alessandro Vesely
On 26/Oct/10 19:08, Murray S. Kucherawy wrote: > On Behalf Of Alessandro Vesely >> On 26/Oct/10 06:58, Murray S. Kucherawy wrote: >>> a verifying module might return a syntax error code or arrange not to >>> return a positive result even if the signature technically validates. >> >> -1. How d

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread John R. Levine
>> +0.999 >> >> My only niggle is where you say "dissallowed by section 3.6 of [MAIL]", >> you might want to add a reference to the RFC 2045 which defines the MIME >> headers. > > OK. > >> You might also want to mention RFC 4021 which is a laundry list of every >> known message header. > > What abo

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Murray S. Kucherawy
> -Original Message- > From: John R. Levine [mailto:jo...@iecc.com] > Sent: Tuesday, October 26, 2010 3:38 PM > To: Murray S. Kucherawy > Cc: ietf-dkim@mipassoc.org > Subject: Re: [ietf-dkim] Take two (was Re: Proposal for new text about > multiple header issues) >

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread John R. Levine
+0.999 My only niggle is where you say "dissallowed by section 3.6 of [MAIL]", you might want to add a reference to the RFC 2045 which defines the MIME headers. You might also want to mention RFC 4021 which is a laundry list of every known message header. Regards, John Levine, jo...@iecc.c

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Steve Atkins
On Oct 25, 2010, at 9:58 PM, Murray S. Kucherawy wrote: > 8.14 Malformed Inputs > > DKIM allows additional header fields to be added to a signed message without > breaking the signature. This tolerance can be abused, e.g. in a replay > attack, by adding additional instances of header fields

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Murray S. Kucherawy
> -Original Message- > From: ietf-dkim-boun...@mipassoc.org [mailto:ietf-dkim-boun...@mipassoc.org] > On Behalf Of Alessandro Vesely > Sent: Tuesday, October 26, 2010 2:59 AM > To: ietf-dkim@mipassoc.org > Subject: Re: [ietf-dkim] Take two (was Re: Proposal for new text

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Hector Santos
Steve Atkins wrote: > On Oct 26, 2010, at 1:49 AM, Hector Santos wrote: >> Murray S. Kucherawy wrote: >>> 8.14 Malformed Inputs >>> >>> DKIM allows additional header fields to be added to a >>> signed message without breaking the signature. >>> This tolerance can be abused.. >> DKIM does n

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Steve Atkins
On Oct 26, 2010, at 1:49 AM, Hector Santos wrote: > I will not pretend to know (nor really care) what it will take to get > over this documentation dilemma but I will provide my comments here: > > Murray S. Kucherawy wrote: >> 8.14 Malformed Inputs >> >> >> DKIM allows additional header field

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Hector Santos
Alessandro Vesely wrote: > On 26/Oct/10 06:58, Murray S. Kucherawy wrote: >> a verifying module might return a syntax error code or arrange not to >> return a positive result even if the signature technically validates. > > -1. How does "might" differ from "MAY"? I think it creates an "IETF proc

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Alessandro Vesely
On 26/Oct/10 06:58, Murray S. Kucherawy wrote: > a verifying module might return a syntax error code or arrange not to > return a positive result even if the signature technically validates. -1. How does "might" differ from "MAY"? ___ NOTE WELL: This l

Re: [ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-26 Thread Hector Santos
I will not pretend to know (nor really care) what it will take to get over this documentation dilemma but I will provide my comments here: Murray S. Kucherawy wrote: > 8.14 Malformed Inputs > > > DKIM allows additional header fields to be added to a > signed message without breaking the signat

[ietf-dkim] Take two (was Re: Proposal for new text about multiple header issues)

2010-10-25 Thread Murray S. Kucherawy
8.14 Malformed Inputs DKIM allows additional header fields to be added to a signed message without breaking the signature. This tolerance can be abused, e.g. in a replay attack, by adding additional instances of header fields that are displayed to the end user or used as filtering input, such