oss-security - Re: CVE Request: Planeshift buffer overflow

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Message-ID: <CAB9ZNAw9vZZKGKyiHANxw+v0gomhqqzxR3xywzPOV13Q5bviAQ@mail.gmail.com>
Date: Thu, 17 May 2012 22:53:02 -0500
From: Andres Gomez <agomez@...idsignal.com>
To: Kurt Seifried <kseifried@...hat.com>
Cc: oss-security@...ts.openwall.com, bugtraq@...urityfocus.com, 
	vuln@...unia.com
Subject: Re: CVE Request: Planeshift buffer overflow

Hi kurt,

The fact that only local user can modify program files doesn't mean there
is no security risk, there are a lot of examples but look at this:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4620

this is very similar, only local user can modify software files, but as
defined by Mitre this bug "allows user-assisted remote attackers to execute
arbitrary code", because an attacker can deceive a user to download and use
a specially crafted file. I accept the fact that "chatbubbles.xml" being a
configuration file makes it harder to be replaced, but still there is a
risk.

Thanks for the feedback,

Andres Gomez

2012/5/17 Kurt Seifried <kseifried@...hat.com>

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 05/17/2012 03:29 PM, Andres Gomez wrote:
> > Planeshift is an online multiplayer role playing game which is
> > open source (http://en.wikipedia.org/wiki/PlaneShift_(video_game))
> > and "chatbubbles.xml" is a sort of configuration file for chat
> > windows inside the game, so I can't be changed directly by remote
> > users.
>
> It doesn't sounds like any security boundary is being crossed.
>
> If you can edit that file I'm guessing you can also modify the other
> game files (executables, libraries, etc.), so there is no escalation
> of privilege as far as I can tell. If the ifle is owned by a unique
> user (e.g. it's a local config thing) again, if you can edit a users
> files you already have access, so no escalation of privilege. If this
> is correct then I will not be assigning a CVE.
>
> - --
> Kurt Seifried Red Hat Security Response Team (SRT)
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