[171021] in North American Network Operators' Group
Re: [[Infowarrior] - NSA Said to Have Used Heartbleed Bug for Years]
daemon@ATHENA.MIT.EDU (Scott Howard)
Tue Apr 15 12:03:16 2014
In-Reply-To: <ED78B1C68B84A14FA706D13A230D7B431E326CEC@ITS-MAIL02.campus.ad.csulb.edu>
Date: Tue, 15 Apr 2014 09:02:46 -0700
From: Scott Howard <scott@doc.net.au>
To: Matthew Black <Matthew.Black@csulb.edu>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Apr 15, 2014 at 6:56 AM, Matthew Black <Matthew.Black@csulb.edu>wrote:
> Seriously? When files are deleted, their sectors are simply released to
> the free space pool without erasing their contents. Allocation of disk
> sectors without clearing them gives users/programs access to file contents
> previously stored by other users/programs.
>
No worthwhile filesystem will allow you to read a block of disk that you
haven't already written to. Once you've written to it, any existing data
that was there is overwritten.
The same isn't true for block-level access, but as a rule that requires
admin access, and once you have that all bets are off...
Scott
