Server: Nextcloud 12 - Issues with Integrity Check and "X-Frame-Options"..."SAMEORIGIN"

[ghost]

Hi Nextclouders,

I just installed Nextcloud 12 alpha (Nextcloud 12.0 alpha Build:2017-04-28T22:01:10+00:00 d4e5b1bf14a9dfd0a4ac09285d6e8e073f8a2d74), based on an ODroid C2, NGINX 1.13, Ubuntu 16.04.02 LTS x64,, PHP 7.1.4, mariadb 10.0.29 and ran into two issues:

• Some files have not passed the integrity check. Further information on how to resolve this issue can be found in our documentation. (List of invalid files… / Rescan…)

> Raw output

Array
(
[bruteforcesettings] => Array
(
[EXCEPTION] => Array
(
[class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
[message] => Signature data not found.
)

• The "X-Frame-Options" HTTP header is not configured to equal to "SAMEORIGIN". This is a potential security or privacy risk and we recommend adjusting this setting.

NGINX is configured properly using "proxy_set_header X-Frame-Options "SAMEORIGIN; always;";"

This is a clone of my productiv Nextcloud 11.0.3 environment which is running without the issues above.

Cheers, Carsten

[MorrisJobke]

The SAMEORIGIN, SAMEORIGN looks wrong, but @LukasReschke can say more on this. In my instance it is only written once:

Maybe @josh4trunks knows why there is same origin listed twice in the headers for Nginx.

[josh4trunks]

@MorrisJobke Maybe it is being set twice because of proxy_set_header X-Frame-Options "SAMEORIGIN; always;";".
@riegercloud I'm not sure why you say this is "configured properly", I do not see this in the documentation.

The documentation already has add_header X-Frame-Options "SAMEORIGIN";

[ghost]

Hi and thanks for all the responses.
I am running NGINX 1.13 as a reverse proxy.
My production system does not show the SAMEORIGIN twice neither.

My Testcloud is installed in a subfolder, located on a second server. The main gateway.conf points to the second server - maybe it is related to that configuration?

The gateway.conf contains of
...
add_header Referrer-Policy "same-origin" always;
add_header X-Frame-Options "SAMEORIGIN" always;
...

The Nextcloud.conf's consists of:
...
server {
...
proxy_set_header X-Frame-Options "SAMEORIGIN; always;";
...
}
...
location ~* .(?:css|js)$ {
...
proxy_set_header X-Frame-Options "SAMEORIGIN; always;";
...

I would provide more information if you are interested in - please let me know ;-)
...:::carsten

[josh4trunks]

Please try removing proxy_set_header X-Frame-Options "SAMEORIGIN; always;";

[ghost]

I removed both entries in the testcloud.conf (Nextcloud 12)

and restarted the relevant services:
service nginx stop && service redis-server restart && service php7.1-fpm restart && service nginx start

Unfortunately still the same behaviour. But i recognized the duplicate entries only appear for e.g. the login or file requests

not for e.g. files

could that point to tne root cause?

[ghost]

gateway_conf.pdf
nextcloud_conf.pdf
ssl_conf.pdf
testcloud_conf.pdf

[josh4trunks]

Can you please post your configs in code blocks instead of PDFs?
Why do you have all of these proxy_set_header lines, when the documentation never uses them?
Ohh, I think you explained this above. I'm not familiar with the difference between these. What is your second server running, just PHP?

That is interesting, even with you SAMEORIGIN lines commented out, the header shows up.
Can you show the contents of your fastcgi_params file?

[ghost]

The documentation of what? Nextcloud?
The documentation didn't fit all my requirements and we did investigat with others in a more secure and more quicker environement.

fastcgi_params (default - no cahnges applied):

fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $document_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;
fastcgi_param  REQUEST_SCHEME     $scheme;
fastcgi_param  HTTPS              $https if_not_empty;

fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx/$nginx_version;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

fastcgi_param  REDIRECT_STATUS    200;

[josh4trunks]

yes i meant the nedtcloud documentation.
from what i am reading proxy_set_header sends these headers to the backend server (in this case php-fpm), I'm pretty sure you should be using addheader.

ok to clarify. you have an nginx instance running the gateway_conf configuration, then for the testcloud, nginx on another machine?

[josh4trunks]

im not sure hoe this double header is being generated. possibly a bug in nextcloud 12?

Im a bit lost in your setup but i do not think that could cause the double header.
you have a gateway (is this also running the ssl_conf) then 2 different ngjnx servers behind it. you also dodnt shoe you php-handler block, but i doubt that has an issue with it.

[josh4trunks]

ohh, i see where the ssl conf is included. disregard my previous question on that.

[ghost]

Server A (nc.c-rieger.de):

• gateway.conf
• ssl.conf

points to

• nextcloud.conf (on Server A / root-folder)
• testcloud.conf (on Server B / as a subfolder -> nc.c-rieger.de/testcloud)

i will re-install Nextcloud 12 in a root-folder instead of a subfolder and will doublecheck.
But as mentioned before, the same nginx-confguration is running well in the productive environment.
I guess, it is a bug in NC12. Maybe hardcoded?

Will be back with the testresults ... but i have to accompany my twins to their riding first.

[josh4trunks]

sounds good, I'm suspecting a bug here

[ghost]

I re-installed NC12 from scratch in the web-root (https://192.168.2.17/login) and took the configuration from Nextclouds-Documentation.

Unfortunately, i still ran in the same issues:

So this must be related to NC12 and NGINX.
Does anybody have a look at the Integrity Failure as well?

[LukasReschke]

The X-Frame-Options header has been moved to the PHP processing and outside of .htaccess so that applications can decide themselves if they want to be iframed. For example for iframing a public Nextcloud calendar or so.

So the X-Frame-Options header should be dropped from the NGINX configuration as this would also make it impossible for applications to control themselves if they want to allow iframing.

[ghost]

OK, if removed from NGINX it works fine.
This should be documented properly and can be closed from my perspective.
But the other issue remains open.
Thank you @LukasReschke

[LukasReschke]

Potential patch at https://github.com/nextcloud/server/pull/4626

[MorrisJobke]

See https://github.com/nextcloud/documentation/issues/434 for the documentation update as well as the release notes

[LukasReschke]

New dailies are at https://download.nextcloud.com/server/daily/latest-master.tar.bz2

[sergeyklay]

@LukasReschke Thank you!