Urgently need help, blank screen only on web frontend (not admin panel)

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AR84
Posts: 23
Joined: Mon Nov 06, 2017 5:12 am

Urgently need help, blank screen only on web frontend (not admin panel)

Postby AR84 » Mon May 27, 2019 7:07 am

Hi guys,

hope someone can help me.
Our current installed version is 8.7.11_GA_1854.FOSS
Without any changes, the web interface stopped working. Actually the login page is showing, once I log in, then there comes only a blank page.
The Admin panel is working totaly fine, there I can login and I dont have any problem.

Just the user web interface is not working, any idea what could be the reason?

What could I check? In the log files I did not find any glue on what could be the reason, also when checking debug information from the web browser there is nothing showing.
What I did notice is, that there was some newly created admin users which I already have deleted, seems like someone got access to the admin panel. But I can not find any problems.
The server itself is running normal and emails are coming in and are beeing sended, just the web interface is not loading for users.

Hope you guys can help me.


Klug
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Re: Urgently need help, blank screen only on web frontend (not admin panel)

Postby Klug » Mon May 27, 2019 7:31 am

Your server might be compromised.

viewtopic.php?f=15&t=65932
AR84
Posts: 23
Joined: Mon Nov 06, 2017 5:12 am

Re: Urgently need help, blank screen only on web frontend (not admin panel)

Postby AR84 » Mon May 27, 2019 7:43 am

Can be marked as solved, the folder / files rights have changed

This article helped: http://forums.zimbra.org/viewtopic.php?f=15&t=66213

Solution:

I did the following (as root);
cd /opt/zimbra/mailboxd
find webapps -type d -exec chmod 0755 {} \;
find webapps -type f -exec chmod 0644 {} \;

Then restart Zimbra;
su - zimbra
zmcontrol restart

After that, everything working fine again and no such messages in the logs anymore.
Klug
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Posts: 2352
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Re: Urgently need help, blank screen only on web frontend (not admin panel)

Postby Klug » Mon May 27, 2019 7:46 am

It's not solved at all.

You've fixed the part you can see (users not login) but you did not fix the root cause (compromised server).
AR84
Posts: 23
Joined: Mon Nov 06, 2017 5:12 am

Re: Urgently need help, blank screen only on web frontend (not admin panel)

Postby AR84 » Mon May 27, 2019 8:27 am

Yes, I understand, I actually followed the instructions and checked about the valnurabilities you mentioned. Also patches have been applied and other security massurements are beeing done. Worst case would be that we move to a new server installation, but as for now we will monitor the server
AR84
Posts: 23
Joined: Mon Nov 06, 2017 5:12 am

Re: Urgently need help, blank screen only on web frontend (not admin panel)

Postby AR84 » Mon May 27, 2019 8:44 am

One thing that does not work is uploading attachments, could you help me locate the folder where we need to check the permissions?

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