Security problem: Locked cinnamon is not-locked!

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Perlover
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Security problem: Locked cinnamon is not-locked!

Post by Perlover » Sun May 06, 2018 7:44 am

Hello!

I have Mint 18.3
Cinnamon 3.6.7

Computer: ASUS UX305C
This computer has micro-hdmi output
Video resolution of ASUS UX305C: 3200x1800 (i think it's related problem)

What happens: i have locked it by Ctrl + Alt + Del
At display of ultrabook i see locked screen and i have locked it.
But if i connect it to monitor (1920x1080) to micro-HDMI-HDMI cable there i see small locked window (left up corner, 1/3 part) and other space - not locked screen
And i had connect mouse to UX305C. I don't know important this or not.

I made video: https://www.dropbox.com/s/j01s2fl9mpp3m ... 4.mp4?dl=0

It's high security vulnerability! Locked computer now is not already locked computer :(

Please help to close this hole!

Thanks!

Perlover

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karlchen
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Re: Security problem: Locked cinnamon is not-locked!

Post by karlchen » Sun May 13, 2018 7:42 am

<bump> No-one interested in the reported issue? </bump>
Image
Linux Mint 18.1 64-bit Cinnamon Desktop, Total Commander 9.21a 64-bit
Ubuntu 18.04.1 32-bit Mate Desktop, Total Commander 9.21a 32-bit
Windows? - 1 window in every room

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MtnDewManiac
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Re: Security problem: Locked cinnamon is not-locked!

Post by MtnDewManiac » Mon May 14, 2018 1:30 pm

karlchen wrote:
Sun May 13, 2018 7:42 am
<bump> No-one interested in the reported issue? </bump>
Was it reported in the proper place? According to http://linuxmint-troubleshooting-guide. ... where.html , for Cinnamon, that place is here:
http://github.com/linuxmint/Cinnamon

Regards,
MDM
Mint 18 Xfce 4.12.

If guns kill people, then pencils misspell words, cars make people drive drunk, and spoons made Rosie O'Donnell fat.

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karlchen
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Re: Security problem: Locked cinnamon is not-locked!

Post by karlchen » Mon May 14, 2018 6:03 pm

Hm. Actually, the reported behaviour reminded me of some bug which had affected the Ubuntu Unity Desktop once in the past.
Similar or same way of getting around the lock screen.
I had hoped someone might remember that case.
I am not even sure if Unity itself was the culprit, or some other system module.
Plus, I had hoped some Mint 18.3 Cinnamon users might chime in and report whether they can reproduce the problem.
My LM 18.1 Cinnamon system is a desktop machine and has got only 1 monitor, not connected via micro-HDMI.
Image
Linux Mint 18.1 64-bit Cinnamon Desktop, Total Commander 9.21a 64-bit
Ubuntu 18.04.1 32-bit Mate Desktop, Total Commander 9.21a 32-bit
Windows? - 1 window in every room

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