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Was my LibreOffice hacked or accessed by outside third party?

asked 2016-12-15 20:47:42 +0200

Resmarohs gravatar image


I have dynamic/changing IP address. It changes after every restart/shutdown - something I need to note now.

I had LibreOffice open, when my Mac encountered problem and had to be forced to shut down. I turned it back on, opened LibreOffice and got this window titled LibreOffice 5.1:

Either another instance of LibreOffice is accessing your personal settings or your personal settings are locked.
Simultaneous access can lead to inconsistencies in your personal settings. Before continuing, you should make sure user [insert my user name] closes LibreOffice on host [ip adress and my ISP provider]
Do you really want to continue?

First I was scared from seeing words "another instance accessing", but as the IP address displayed resembled one of my own, I performed an experiment. I made snapshot of my current IP address, then forcibly shut Mac down one more time, turned it on and opened LibreOffice to get another one of those windows.

I compared IP addresses: The IP address I had before forcibly shutting down was the same the alert window had.

So, is it logical to conclude that when LibreOffice is open and Mac is forcibly shut down, it memorizes the IP address Mac had during shut down, then keeps it in memory and when Mac is turned on again with new IP address, Libre Office still holds to that previous IP address?

And that the first time it happened, where I couldn't compare IPs, it was the same issue - as I have not encountered this problem ever again after that time.

Chance of anything malicious going in should therefore be impossible?

One of the replies in here: Says that:

"Unless you are 'myname' in that error message, then you need a firewall installing (possibly a good idea anyway)."

Problem is, I do not know if the IP address first time had been mine or maybe someone from same ISP provider, accessing my LibreOffice. The following experiment following this event showed that forced shut down does make Libre Office remember the IP address Mac had before forced shut down.

What I need to know is, how likely is it that the first time was someone accessing/hacking my LibreOffice or is that impossible?

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answered 2016-12-15 21:42:27 +0200

floris v gravatar image

Not likely. Google for your question and you will find a lot of discussions of the same thing. Like this one.

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@floris v Hello and thank you! That thread has people who have constant problem with this message. Hm, maybe I got luckier then. Kind of strange I got only so few, almost making me worried. I'd give upvote to you but it won't let me. :) If you do see this message, I was wondering, is it strange LibreOffice knew my IP address?

Resmarohs gravatar imageResmarohs ( 2016-12-16 00:00:17 +0200 )edit

I don't know, it depends on the configuration, if the IP is used there, then Libre might know about it.

floris v gravatar imagefloris v ( 2016-12-16 11:14:57 +0200 )edit

@floris v Sorry, what do you mean by configuration? I simply downloaded LibreOffice to my Mac and installed it. I don't remember it asking about anything about IP address.

Resmarohs gravatar imageResmarohs ( 2016-12-16 12:17:47 +0200 )edit

It's very unlikely that you were hacked. Libre saw the .lock file and that's why it assumed that another user had been busy, it's not, I think, related to your IP address. But another question: do you have a firewall? If not, better get one.

floris v gravatar imagefloris v ( 2016-12-16 15:02:01 +0200 )edit

@floris v Yes, I have Mac firewall enabled and on hardest settings: block all incoming connections (meaning only important system files) and Enable Stealth Mode.

Resmarohs gravatar imageResmarohs ( 2016-12-16 19:38:47 +0200 )edit
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Asked: 2016-12-15 20:47:42 +0200

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Last updated: Dec 15 '16