[ mailman-Bugs-815297 ] Breaking signatures in message/rfc822 attachement!

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Tue Sep 30 13:42:25 EDT 2003


Bugs item #815297, was opened at 2003-09-30 19:42
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
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Category: security/privacy
Group: 2.1 (stable)
Status: Open
Resolution: None
Priority: 5
Submitted By: Bernhard Reiter (ber)
Assigned to: Nobody/Anonymous (nobody)
Summary: Breaking signatures in message/rfc822 attachement!

Initial Comment:
Mailman _must_ not touch MIME-parts which are nested

more deeply in the mail. As tested with Mailman 2.1.2,

header lines will be sometimes reformatted in

message/rfc822 attachments which will break the OpenPGP

signature

(also conforming to the PGP/MIME standard) on that part.



I'm attaching a simple email with on long header.

Forward this as MIME part and sign it sending it

through Mailman,

the signature will be broken.



This is an email security affecting bug, because if people 

start believing that a *BAD* signature does not mean much,

because they get many broken by mailman, they will not

react

to a seriously manipulated email anymore!



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