(Tested only on Multiplayer, any device crashes)
When a Item Entity is spawned in the world that is Air or not implemented, the client will crash.
Players with mods can use that to crash people on servers.
Linked issues
Comments 6
Ya, this is "intended" as in, "please don't hack/do that". 😉 It will be fixed in the near future though, so I think it's a valid ticket.
Related: MCPE-1531 (but this can be done client-side, not only server-side)
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Updated the affected versions, and added a note (it's currently a major issue for some public servers).
Item spawn using AddItemEntityPacket (0x8E)