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Subject: Re: openssh: privilege separation no longer supported on Cygwin?
To: cygwin AT cygwin DOT com
References: <d436698bbd53eef3cbdda788d4926109 AT xs4all DOT nl>
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID: <37b863f6-ce5c-ef13-569f-8044fe485075@gmail.com>
Date: Mon, 29 May 2017 10:39:28 +0200
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On 29/05/2017 07:23, Houder wrote:
> Hi,
>
> Privilege separation in sshd defaults to "sandbox" (as far as
> I understand, "openssh" has implemented a new mechanism).
>
> ... now I remember Corinna writing, that 'sandbox will not be
> an option for Cygwin' ... or words to that effect.
>
> Does this mean, that under Cygwin, privilege separation is no
> longer possible?
>
> ... because, that is, I think, what I am seeing:
>
>  - the userid of child sshd is still 'cyg_server' ...
>  - and I get an elevated shell when I login ...
>
> Not what I expected ...
>
> Gr. Henri
>

Hi Houder,
please read the last Announcement

https://sourceware.org/ml/cygwin-announce/2017-03/msg00028.html

* This release deprecates the sshd_config UsePrivilegeSeparation
    option, thereby making privilege separation mandatory. Privilege
    separation has been on by default for almost 15 years and
    sandboxing has been on by default for almost the last five.


It seems you misunderstood the communication:
- the possibility to NOT use "privilege separation" is deprecated
- "privilege separation" will became mandatory

Regards
Marco


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