Message-ID: <4214F4A8.3080709@tiscali.de>
Date: Thu, 17 Feb 2005 20:46:48 +0100
From: Matthias-Christian Ott <matthias.christian@tiscali.de>
User-Agent: Mozilla Thunderbird 1.0 (X11/20050108)
MIME-Version: 1.0
To: Adrian Bunk <bunk@stusta.de>
CC: Parag Warudkar <kernel-stuff@comcast.net>,
       Paolo Ornati <ornati@fastwebnet.it>, bruno.virlet@gmail.com,
       linux-kernel@vger.kernel.org
Subject: Re: spam mails with the same Message-ID
References: <4213AB2B.2050604@giesskaennchen.de> <20050217154250.110f4615@localhost> <20050217161048.20daf6cd@localhost> <200502171026.55766.kernel-stuff@comcast.net> <20050217170211.GA1772@stusta.de>
In-Reply-To: <20050217170211.GA1772@stusta.de>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1602
Lines: 56

Adrian Bunk wrote:

>On Thu, Feb 17, 2005 at 10:26:55AM -0500, Parag Warudkar wrote:
>  
>
>>On Thursday 17 February 2005 10:10 am, Paolo Ornati wrote:
>>    
>>
>>>>???ã?
>>>>    ????_??յ_?????_??
>>>>        
>>>>
>>>and... what does this means?
>>>      
>>>
>>SPAM. This looks to me like a new way of spamming though, replying to valid 
>>mailing list messages. (I too received couple of these in reply to my 
>>messages.)
>>    
>>
>
>The most interesting fact seems to be that these spam messages have the 
>same message ID as the original Mails.
>
>If you run a program that automatically discards duplicate mails and the 
>spam message reaches you faster than the original email through 
>linux-kernel (which seems to often happen with these mails), the 
>original email will be discarded. 
>
>I don't know whether these are known attacks, but the automatic 
>discarding of duplicated emails offers attackers nice opportunities if 
>they know a message ID (as with these emails) or can guess the
>message ID (since many MUAs have predictable message IDs, an attacker C
>could use this to suppress a message from person A to person B by 
>sending an email with the message ID to person B bevor person B gets 
>the email from person A).
>
>  
>
>>Parag
>>    
>>
>
>cu
>Adrian
>
>  
>
The spamers become always cleverer :-) .

Matthias-Christian Ott
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/