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From: Mike Hamburg <hamburg@fas.harvard.edu>
To: Oliver Bandel <oliver@first.in-berlin.de>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Safe marshall?
Date: Wed, 16 Feb 2005 19:11:03 -0500	[thread overview]
Message-ID: <2e5e99be112833192813a47498863ed2@fas.harvard.edu> (raw)
In-Reply-To: <20050216225534.GA556@first.in-berlin.de>

I don't know of any way to tell a C function typing information.  Maybe 
with GCaml, but I haven't seen a new version of that in a long time.  
Even to get such information from within Caml sounds dubious; it seems 
like a Haskell-type-class-esque solution would be needed.

Anyway, is the Objective-C serialization safe?  This sounds unlikely to 
me...

Mike

On Feb 16, 2005, at 5:55 PM, Oliver Bandel wrote:

> On Wed, Feb 16, 2005 at 05:07:55PM -0500, Mike Hamburg wrote:
>> Is there any way to call Marshall in a type-safe way?  I need to use
>> marshaling for a networking program, and I'd rather not leave Marshal
>> as an arbitrary code execution vulnerability (which it is as far as I
>> can tell: switching on a Marshaled value should produce a computed
>> jump, which can be set by an attacker to point to an arbitrary place).
>> Am I stuck writing my own marshal function?
>
> Is it possible to say a C-function *anything* about a datastructure's 
> structure?
> Via the C-interface of OCaml?!
>
> If so.... at least under Mac OS-X it should be possible to solve that 
> task
> with Objective-C. It can dump objects completely.
>
> So this -  at least on this platform - would be possible then.
>
> But IMHO this may not be possible with all Objective-C implementations.
>
> Ciao,
>   Oliver
>
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  reply	other threads:[~2005-02-17  0:11 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-16 22:07 Mike Hamburg
2005-02-16 22:55 ` [Caml-list] " Oliver Bandel
2005-02-17  0:11   ` Mike Hamburg [this message]
2005-02-18  5:26     ` Oliver Bandel
2005-02-17  9:39 ` Gerd Stolpmann
2005-02-17 23:14   ` Eric Stokes
2005-02-18  5:29     ` Oliver Bandel
2005-02-18  9:41       ` Gerd Stolpmann
2005-02-18 10:10         ` Gerd Stolpmann

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