Re: About (TWiki/web apps) sessions save dir - Was: Re: RFS: Second try for twiki-ldapcontrib, new upstream version - Re: RFS: twiki-ldapcontrib - LDAP services for TWiki
Having slept on it, I agree with Vincent and Dmitry.
I think there is no sane way to have a secure session dir for cgi apps
that might at any time need to be recreated with a unique name...
basically, imagine what happens when you have a heavily loaded server,
each of 100s of cgi scripts realising that the session dir has gone, and
they all create a unique new one, and try to update the cfg file!!!
seriously bad news.
I will re-do the twiki package to rely on /var/run/twiki (or
/var/lib/twiki/tmp if someone here suggests so) and a cronjob.
Post Lenny, I think is is desperatly important for DD's to get a Secure
cgi session _file_ policy created - and I suspect, some support systems
to ensure that it won't cause the server issues such as filling up /var,
preventing logging (the reason that I originally was asked to move it
out of /var/lib/twiki).
Could someone please give me an idea of how long i have before it is too
late to fix this for lenny?
Sven
Olivier Berger wrote:
> Hi Vincent.
>
> Le samedi 16 août 2008 à 13:26 +0200, Vincent Bernat a écrit :
>> I would be happy to upload your fix but I disagree with it. As pointed
>> by Olivier at the end of the bug report, /tmp can be flushed at boot or
>> by some cronjobs. Therefore, you cannot ensure that the twiki directory
>> still exists when twiki will be running.
>>
>> I cannot give an universal solution, but in Roundcube, we use
>> /var/lib/roundcube/temp and we provide a cron job that will clean it
>> every m days where <m> can be set by the user in /etc/default/roundcube
>> (and I just noticed that this is broken... will upload a fix). This way,
>> we don't fill up /var but we don't rely on anything in /tmp. Moreover,
>> we don't have to handle a complex script in postinst to circumvent
>> symlinks attacks.
>>
>> The problem with webapps is that we don't have a clear policy of what to
>> do. You can just look at other packages, like phpmyadmin, mediawiki,
>> etc. Each attempt to establish a webapps policy seems to be aborted.
>
> That's why I asked for advice on debian-devel@ with no success :(
> http://lists.debian.org/debian-devel/2008/08/msg00340.html
>
> Feel free to comment anyway ;)
>
> Best regards,
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