bugtraq - Re: 2 vulnerabilities combine to auto execute received files in Nokia series 60 OS

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Message-ID: <41F557F3.3080606@psilanthropy.org>
Date: Mon, 24 Jan 2005 14:17:55 -0600
From: Anders Langworthy <hades@...lanthropy.org>
To: Paul Kurczaba <seclists@...urinews.com>
Cc: rohit@...tikalsolutions.com, bugtraq@...urityfocus.com,
        full-disclosure@...ts.netsys.com
Subject: Re: 2 vulnerabilities combine to auto
	execute	received files in Nokia series 60 OS

Paul Kurczaba wrote:
> Wouldn't the phone try to open the jpg file as a picture, and not execute
> it. Just like on desktop PCs: if you rename a .exe (application/program) to
> a jpg (picture file), and try to open the file, your image program will open
> the file, thinking it is a image file. The application code will not be
> executed.

Ideally, yes.  But as demonstrated by the Microsoft GDI exploit, just 
because a file is not executed proper doesn't necessarily mean it's safe 
from problems in the underlying application.

I'd still say that this isn't really a problem directly (after all, it's 
considered "safe" to view a webpage with images that are loaded without 
prompting), but the fact that attachments are automagically loaded does 
provide a spectacular way to automatically infect a large amount of 
phones if somebody were to come up with a way to payload an attachment.

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