From: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
To: Gervasio Bernal <gervasiobernal@speedy.com.ar>
Cc: netfilter-devel@lists.netfilter.org
Subject: Re: New extension: CRYPT target
Date: Tue, 23 May 2006 18:46:42 +0200 [thread overview]
Message-ID: <44733C72.1020008@gmx.net> (raw)
In-Reply-To: <4473380F.5050102@speedy.com.ar>
Gervasio Bernal wrote:
> Gervasio Bernal wrote:
>> Carl-Daniel Hailfinger wrote:
>>
>>> Gervasio Bernal wrote:
>>>
>>>
>>>> Carl-Daniel Hailfinger wrote:
>>>>
>>>>
>>>>> Gervasio Bernal wrote:
>>>>>
>>>>>
>>>>>
>>>>>> (on host A, 1.2.3.4, FTP client)
>>>>>> # iptables -t mangle -A POSTROUTING -d 1.2.3.5 -p tcp --dport 20:21 -j
>>>>>> CRYPT --cipher blowfish --key topsecret --mode ecb --direction encrypt
>>>>> Ouch. If anybody runs ps while this iptables command is running, he has
>>>>> your top secret key.
>>>
>>> How are you going to prevent that?
>> Well, give us some time to study it.
>
> One possible solution would be to use a file to store the key, and chmod
> that file.That would be correct?
No. Still leaves a race. You have to chmod the file before you store the
key in it. Then it would be ok.
Regards,
Carl-Daniel
--
http://www.hailfinger.org/
next prev parent reply other threads:[~2006-05-23 16:46 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-21 15:59 New extension: CRYPT target Gervasio Bernal
2006-05-21 17:01 ` Carl-Daniel Hailfinger
2006-05-21 21:15 ` Gervasio Bernal
2006-05-21 22:17 ` Carl-Daniel Hailfinger
2006-05-22 23:49 ` Gervasio Bernal
2006-05-23 16:27 ` Gervasio Bernal
2006-05-23 16:46 ` Carl-Daniel Hailfinger [this message]
2006-05-23 17:07 ` Patrick McHardy
2006-05-23 17:14 ` Carl-Daniel Hailfinger
2006-05-23 23:13 ` Gervasio Bernal
2006-05-24 5:03 ` Patrick Schaaf
2006-05-23 18:26 ` Michael Richardson
2006-05-21 22:57 ` Michael Richardson
2006-05-22 23:36 ` Gervasio Bernal
2006-05-23 13:08 ` Michael Richardson
2006-05-23 17:19 ` Gervasio Bernal
2006-05-21 17:51 ` Martijn Lievaart
2006-05-21 20:34 ` Cedric Blancher
2006-05-21 21:01 ` Gervasio Bernal
2006-05-21 22:54 ` Michael Richardson
2006-05-21 20:27 ` Gervasio Bernal
2006-05-25 16:11 ` Lennart Poettering
2006-05-26 18:12 ` Gervasio Bernal
2006-05-26 18:25 ` Patrick McHardy
-- strict thread matches above, loose matches on Subject: below --
2006-05-23 23:33 Gervasio Bernal
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