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Re: Re[2]: Linux hardening

from [Daniel Margolis] Network Security [Permanent Link]
Subject: Re: Re[2]: Linux hardening
Date: Mon, 29 Aug 2005 19:04:46 -0400 

On Aug 23, 2005, at 12:58 PM, Kir wrote:

How did u modify your wget or curl for not to download to /tmp and /var/tmp?


It`s  simple, really: you can modify source code of the wget
to   include  string  matching (strncmp(url, "/tmp", 4)) and
throwing  exception on positive result. Then all you need to
do  is recompile code and replace original wget with the new
one.


What do you mean? Curl prints to STDOUT. If someone manages to exec a shell, couldn't he just redirect the curl output to /tmp as he desires?

Anyway, it seems to me it'd be more effective to make sure he cannot execute whatever it is he downloaded; the noexec flag and GRSec's TPE would probably both be useful for that.

Or did I misunderstand you?

Dan

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