Re: Testing squid 4.0.23 - grsec denied kernel module auto-load of nf_conntrack_netlink by uid 23

[Michael Tremer <michael.tremer@ipfire.org>]

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Okay, please keep an eye on squid 4 for us then. I am not following this very
closely and have no idea what will change in squid 4.

Best,
-Michael

On Sun, 2018-01-21 at 21:35 +0100, Matthias Fischer wrote:
> On 21.01.2018 19:57, Michael Tremer wrote:
> > Hello,
> > 
> > yes this is correct.
> > 
> > We don't allow an unprivileged user to load any kernel modules.
> 
> Ok, then my suspicion was right.
> 
> > What does squid need this for? Why are you playing around with squid 4?
> 
> 1. I don't know. 3.5.27 doesn't do this.
> 2. As I wrote - just to keep in touch with their development. Once in a
> while, 'squid 3' will be deprecated and I wanted to see what comes next,
> even though this may take a long time. Just being curious and the
> 'Devel' was somehow bored. ;-)
> 
> > You should be able to load the module first and then start squid.
> 
> I'm not that curious - this was for testing and for testing only.
> 
> Best,
> Matthias
> 
> > Best,
> > -Michael
> > 
> > On Sun, 2018-01-21 at 01:50 +0100, Matthias Fischer wrote:
> > > Hi,
> > > 
> > > Just to keep in touch, I tested 'squid 4.0.23' yesterday - it seemed to
> > > run fine at first. But after a while I took a closer look at the logs
> > > and discovered a bunch of kernel messages within a few hours and I don't
> > > know what exactly triggered these messages:
> > > 
> > > ...
> > > 132 Time(s): grsec: denied kernel module auto-load of
> > > nf_conntrack_netlink by uid 23
> > > ...
> > > 
> > > As far as I found out: "uid 23" => squid-user, and the new squid tried
> > > to 'autoload' a module which 'grsec' didn't like. Is this a correct
> > > interpretation and has anyone some useable clue how to avoid this?
> > > 
> > > Besides, after going back to '3.5.27' the messages didn't came back
> > > again. '4.0.22' didn't throw these messages, too. They changed something
> > > and I don't know what it is...
> > > 
> > > Thanks for all tips!
> > > 
> > > Best,
> > > Matthias
> > > 
> > > 
> 
> 

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