[Akonadi] [Bug 402061] New: Google resources handled wrong / Double calendar entries, and invite hijacked as Organizer

[Joerg Mertin]

https://bugs.kde.org/show_bug.cgi?id=402061

            Bug ID: 402061
           Summary: Google resources handled wrong / Double calendar
                    entries, and invite hijacked as Organizer
           Product: Akonadi
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Google Resource
          Assignee: dvratil at kde.org
          Reporter: kdebugs_jm at solsys.org
                CC: kdepim-bugs at kde.org
  Target Milestone: ---

Created attachment 116880
  --> https://bugs.kde.org/attachment.cgi?id=116880&action=edit
IRC Discussion about the bug

SUMMARY
When using google as calendar service (google calendar configured, "use
groupware communication"), 2 things happen when one receives an invite.


STEPS TO REPRODUCE
1. When accepting the invite, the calendar entry is Hijacked and one is
entering the appointment as organizer, and sending out that Acceptance with a
full calendar entry (ics-file) to all attendees
2. If any of these attendees Accepts your hijacked calendar entry, and you add
these to the calendar (the acceptance), a new calendar entry is added to the
google calendar and all attendees receive a new mail (snowball system).


OBSERVED RESULT

- One becomes the Owner (organizer) of the calendar entry very fast, and
receives tons of rejected/accepted mails from all other attendees.
- When Manipulating any of these acceptance mails, one starts the process
again, cause duplicate, tripple, quadruple etc. entries in the calendar.


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: KUbuntu 18.10
(available in About System)
KDE Plasma Version: 5.14.4
KDE Frameworks Version:  5.52.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION
See discussion in IRC chat (added as text attachment).

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