Date: Tue, 31 Mar 2015 10:09:00 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: Slawa Olhovchenkov <slw@zxy.spb.ru>, freebsd-security@freebsd.org Subject: Re: ftpd don't record login in utmpx Message-ID: <551A561C.5000904@digiware.nl> In-Reply-To: <20150331034402.GE74532@zxy.spb.ru> References: <20150330142543.GD74532@zxy.spb.ru> <44y4me9gfi.fsf@lowell-desk.lan> <20150331034402.GE74532@zxy.spb.ru>
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On 31-3-2015 05:44, Slawa Olhovchenkov wrote:
> On Mon, Mar 30, 2015 at 08:08:49PM -0400, Lowell Gilbert wrote:
>
>> Slawa Olhovchenkov <slw@zxy.spb.ru> writes:
>>
>>> ftpd from FreeBSD-10 and up don't record ftp logins to utmpx database
>>> (for case of chrooted login).
>>> This is lack security information.
>>> I found this is done by r202209 and r202604.
>>> I can't understand reason of this.
>>> Can somebody explain?
>>
>> Having a jail log into the base system is a security issue in the
>> making. Can't you do this in a safer way by doing remote logging to the
>> base system rather than having the jail hold on to a file handle that
>> belongs outside the jail?
>
> Jail? Why I you talk about jail?
>
>> It's certainly possible to maintain these kinds of capabilities, but
>> you would have to convince code reviewers that the same results can't be
>> achieved some other way that's easier to secure.
I might have just too many miles on the clock already....
It used to liek this: to be able to do anything usefull in a chroot,
you'd rebuild those parts of the system tree that you need in under the
chrootdir.
Eg. including ls(1) and all the libs it needed to function in ftpd.
Some for apaches that ran chrooted, you'd carry/duplicate all you needed
into the chroot env
So in this case you probably need
${CHROOTDIR/var/log
and create the database there.
A Jail is no different in that, other than that it does this by default
in some of the packages: eg. ezjail.
--WjW
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