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Date: Tue, 03 Sep 2013 13:41:03 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Jonas Meurer <jonas@...esources.org>, Vincent Danen <vdanen@...hat.com>,
contribute@...ios.org
Subject: Re: CVE request: unauthorized host/service views displayed
in servicegroup view
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On 08/30/2013 09:47 AM, Jonas Meurer wrote:
> Any news on that?
>
> I still believe that there's a misunderstanding. I still consider
> the bug I found as security relevant. Hostnames are leaked to
> unauthorized nagios-cgi users.
>
> In case that you don't agree with what I've written below, please
> explain.
>
> Honestly, I cannot believe that it was meant as a _feature_ by
> nagios devs that _all_ hostnames are displayed for _all_ users,
> regardless whether they're listed in contacts/contactgroups.
>
> I don't consider this issue too important, but still a CVE would
> be appropriative in my opinion. It should be fixed in future
> uploads of nagios3 to the major distributions. Most nagios admins
> might be unaware of this issue.
>
> Kind regards, jonas
>
>
> Am 2013-08-04 02:40, schrieb Jonas Meurer:
>> Hello,
>>
>> sorry, I'm on holidays and cannot work on this issue for the next
>> two weeks. But I think that there is a missunderstanding. See my
>> short comment below.
>>
>> Am 02.08.2013 19:27, schrieb Vincent Danen:
>>> * [2013-07-10 17:17:08 +0200] Jonas Meurer wrote:
>>>
>>>> Hello,
>>>>
>>>> Am 2013-07-08 20:16, schrieb Kurt Seifried:
>>>>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
>>>>>
>>>>> On 06/26/2013 01:42 PM, Kurt Seifried wrote:
>>>>>> On 06/26/2013 12:36 PM, Vincent Danen wrote:
>>>>>>> I don't believe a CVE has been assigned to this issue
>>>>>>> yet.
>>>>>>
>>>>>>> It was reported that Nagios 3.4.4 at least, and
>>>>>>> possibly earlier versions, would allow users with
>>>>>>> access to Nagios to obtain full access to the
>>>>>>> servicegroup overview, even if they are not authorized
>>>>>>> to view all of the systems (not configured for this
>>>>>>> ability in the authorized_for_* configuration option).
>>>>>>> This includes the servicegroup overview, summary, and
>>>>>>> grid.
>>>>>>
>>>>>>> Provided the user has access to view some services,
>>>>>>> they will be able to see all services (including those
>>>>>>> they should not see). Note that the user in question
>>>>>>> must have access to some services and must have access
>>>>>>> to Nagios to begin with.
>>>>>>
>>>>>>> This has not yet been corrected upstream.
>>>>>>
>>>>>>> References:
>>>>>>
>>>>>>> http://www.mail-archive.com/nagios-users@lists.sourceforge.net/msg39749.html
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>>
>>>>>>>
http://tracker.nagios.org/view.php?id=456
>>>>>>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=714171
>>>>>>>
>>>>>>>
https://bugzilla.redhat.com/show_bug.cgi?id=978531
>>>>>>
>>>>>>
>>>>>>> Thanks.
>>>>>>
>>>>>> Please use CVE-2013-2214 for this issue.
>>>>>
>>>>> It appears there are may be some problems with this issue,
>>>>> potentially this may have been a bad configuration and not
>>>>> a source code based problem, however we haven't been able
>>>>> to confirm it yet. I've also not been able to contact
>>>>> upstream about this easily (no security@ address, if anyone
>>>>> know whom to forward this to, please let me know, thanks.
>>>>
>>>> I'm wondering why you fail to reproduce this issue. I posted
>>>> some details regarding my setup at the Nagios Tracker:
>>>> http://tracker.nagios.org/view.php?id=456
>>>>
>>>> Unfortunately Nagios upstream sometimes rather unresponsive.
>>>> At least that's what I observed.
>>>>
>>>> Please let me know if you need any further details regarding
>>>> the bug or advice on how to reproduce it.
>>>
>>> To close the loop on this, the CVE should probably be
>>> rejected. According to upstream, this is done by design. One
>>> of our users noted it in our bugzilla:
>>>
>>> https://bugzilla.redhat.com/show_bug.cgi?id=978531#c11
>>>
>>> He has a thorough explanation, but the bottom line is this
>>> seems to be by design, as noted in the changelog:
>>>
>>> http://www.nagios.org/projects/nagioscore/history/core-3x
>>>
>>> * Users can now see hostgroups and servicegroups that contain
>>> at least one host or service they are authorized for, instead
>>> of having to be authorized for them all (Ethan Galstad)
>>
>> As I understand this changelog entry, it means the following:
>>
>> Hostgroups and servicegroups are listed with all the
>> _authorized_ members if the user is authorized to see at least
>> one member.
>>
>> To me it doesn't mean the following (which was the case without
>> my patch):
>>
>> Servicegroups are listed with all members (regardless wether
>> authorized or unauthorized) if the user is authorized to see at
>> least one member.
>>
>> Another argument for my point of view is that the nagios
>> maintainers (silently) accepted my patch (at least if I remember
>> correctly, it has been incorporated into the upstream development
>> repository). Unfortunately there's still not one single statement
>> from upstream about the issue, that I'm aware of.
>>
>>> I suspect this CVE should be rejected as this is done by
>>> design.
>>
>> Like explained above, I disagree with this suggestion :)
>>
>> Kind regards, jonas
https://bugzilla.redhat.com/show_bug.cgi?id=978531#c11
So as I understand it, NOTABUG, upstream documented it, etc.
- --
Kurt Seifried Red Hat Security Response Team (SRT)
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