338971 - pasting base64 msg contents into new compose window results in hang...

Status: RESOLVED WORKSFORME

(Thunderbird :: Message Compose Window, defect)

Description

[Charles Swiger]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3

Trying to forward incoming spam to an abuse contact, which consisted of a GIF image as a single base-64 encoded attachment resulted in T'bird hanging.  Example of message which causes the crash:

Return-path: <[e-mail]>
Received: from mac.com (smtpin14-en2 [10.13.11.242])
 by ms84.mac.com (iPlanet Messaging Server 5.2 HotFix 2.06 (built Mar 28 2005))
 with ESMTP id <[e-mail]> for [e-mail]; Tue,
 23 May 2006 06:32:39 -0700 (PDT)
Received: from techflow.com ([218.152.188.158])
	by mac.com (Xserve/smtpin14/MantshX 4.0) with SMTP id k4NDVBfG025284; Tue,
 23 May 2006 06:31:33 -0700 (PDT)
Date: Tue, 23 May 2006 11:04:50 -0300
From: Andreia <[e-mail]>
Subject: Stay at Home Moms  -  DWw
To: [e-mail]
Cc: [e-mail], [e-mail]
Message-id: <[e-mail]>
MIME-version: 1.0
Content-type: multipart/related; boundary=------------315758870255071153060767
X-Accept-Language: en-us
User-Agent: Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.3.1) Gecko/20030701
Original-recipient: rfc822;[e-mail]


--------------315758870255071153060767
Content-Type: text/html;
	charset="us-ascii"
Content-Transfer-Encoding: base64

PGh0bWw+DQoNCjxoZWFkPg0KPG1ldGEgaHR0cC1lcXVpdj0iQ29udGVudC1MYW5ndWFnZSIgY29u
dGVudD0iZW4tdXMiPg0KPG1ldGEgbmFtZT0iR0VORVJBVE9SIiBjb250ZW50PSJNaWNyb3NvZnQg
RnJvbnRQYWdlIDUuMCI+DQo8bWV0YSBuYW1lPSJQcm9nSWQiIGNvbnRlbnQ9IkZyb250UGFnZS5F
[ ...snipped for brevity... ]

Reproducible: Always

Steps to Reproduce:
1. Find a spam message containing a base64 attachment, typically a GIF
2. Hit cntl-u to "view source", hit cntl-a, cntl-c to copy entire contents.
3. Close "view source window".
4. Hit cntl-m or reply button to create a new compose window
5. Paste via cntl-v, results in app hung for at least 5 minutes...
Actual Results:  
T'bird hangs.  Hand seems to be reproducable with other spam messages which use base-64 content-encoding, and not specific to the one quoted above...

Expected Results:  
Compose window in normal state to edit or send on to abuse@ whatever domain...

Hanging application thunderbird.exe, version 1.8.20060.30803, hang module hungapp, version 0.0.0.0, hang address 0x00000000.

Comment 1

[Mike Cowperthwaite]

Can you reproduce this with any other message?  Is this message distinctive in any way, e.g. particularly large?

> version 1.8.20060.30803

I don't recognize this version number.  Which version of TB are you using?

Comment 2

[Charles Swiger]

1.5.0.2, updated from a 1.5 install via Thunderbird's self-update mechanism.  Email sent by it has the following header:

User-Agent: Thunderbird 1.5.0.2 (Windows/20060308)

Comment 3

[Charles Swiger]

That specific message was less than 50K, I believe.  I'm at work now so I can't double-check until tonight, but I believe the following message also displayed the same hang problem:

http://www.pkix.net/~chuck/m1.txt

...and I've seen similar base-64/GIF spams starting to appear recently that I should be able to find more examples if that would help.

Comment 4

[Mike Cowperthwaite]

(In reply to comment #3)
> the following message also displayed the same hang problem:
> 
>  http://www.pkix.net/~chuck/m1.txt

Yes, it does; I simply downloaded that URL to my browser, copied the text, and tried to paste, and wham:  TB 1.5 is sitting there spinning its wheels with 
95+% of CPU.

I can't reproduce using a 2a1 or 3a1 nightly, however.


> ...and I've seen similar base-64/GIF spams starting to appear recently that I
> should be able to find more examples if that would help.

The data in fact is a base-64 *text/html* message.  But the actual content of 
my clipboard buffer is text/plain, so I have no idea what's causing this hang.

Comment 5

[Joshua Cranmer [:jcranmer]]

Comment 4 states "I can't reproduce using a 2a1 or 3a1 nightly." I tested by appending the message to my Junk folder and copying, and, lo and behold, no hang.

RESO WFM.