Bug 475505

Summary: Ending portal does not stop screen cast
Product: [Plasma] xdg-desktop-portal-kde Reporter: Jonas Eymann <j.eymann>
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: grave CC: aleixpol, jgrulich, nate
Priority: NOR    
Version First Reported In: 5.27.8   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 5.27.9
Sentry Crash Report:

Description Jonas Eymann 2023-10-12 08:44:30 UTC
SUMMARY
***
When sharing the screen in a Plasma Wayland session using TeamViewer, the screen cast continues to get transmitted even after the user has stopped the portal session. This can have potential security implications as the user is wrongly assuming that the session was stopped.
***

STEPS TO REPRODUCE
1. Install recent TeamViewer version on a system running KDE Plasma (tested with Fedora 38 and KDE Plasma 5.27.8)
2. Connect to the system when running a Wayland session
3. In the status bar of KDE Plasma, click the screen icon indicating an active remote desktop portal session and click "End"

OBSERVED RESULT
* Remote input gets stopped properly, but screen cast is still being updated on the remote side

EXPECTED RESULT
* Screen cast should not get updated anymore

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 38, KDE neon testing
KDE Plasma Version: 5.27.8

ADDITIONAL INFORMATION
* TeamViewer should also close the connection due to the stopped signal. This is a known issue at TeamViewer (however, this would then hide above problem)
* I found this merge request which might be related, but I think it was only merged to master, i.e. not the 5.27 branch: https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/merge_requests/215
Comment 1 Bug Janitor Service 2023-10-12 08:47:02 UTC
A possibly relevant merge request was started @ https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/merge_requests/235
Comment 2 Nate Graham 2023-10-13 21:36:48 UTC
Thanks for noticing. It was cherry-picked into Plasma 5 with https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/7d3e4285a0f95e45c5fcde10f63d46343c16630f.