Kick exploits: Difference between revisions

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'''Kick exploits''' are [[Wikipedia:Exploit (computer security)|exploits]] in the [https://minecraft.wiki/w/Java_Edition_protocol Java Edition protocol] implementation or game logic implementation that can be abused to disconnect a client from the server.
'''Kick exploits''' are [[Wikipedia:Exploit (computer security)|exploits]] in the [https://minecraft.wiki/w/Java_Edition_protocol Java Edition protocol] implementation or game logic implementation that can be abused to disconnect a client from the server.


=Server-side=
==Serverside==


Server-side kicks force the server to disconnect a client.
Serverside kicks force the server to disconnect a client.


===Oversized packets===
===Oversized packets===
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ViaVersion kick exploits are occasionally the result of [[ViaVersion#Bugs|ViaVersion bugs]], but are usually caused by [[Kick exploits#Oversized packets|oversized packet kicks]].
ViaVersion kick exploits are occasionally the result of [[ViaVersion#Bugs|ViaVersion bugs]], but are usually caused by [[Kick exploits#Oversized packets|oversized packet kicks]].


=Clientside=
==Clientside==


Client-side exploits cause unpatched clients to disconnect from the server.
Clientside exploits cause unpatched clients to disconnect from the server.
 
===Long commands in command blocks===
 
When a client opens a command block that contains a large command inside, and attempts to request a completion for it (always done for legacy commands like <code>/sudo</code>), it can be too large for the server to accept and the server will kick the player.


==References==
==References==

Latest revision as of 06:03, 12 August 2026

Kick exploits are exploits in the Java Edition protocol implementation or game logic implementation that can be abused to disconnect a client from the server.

Serverside[edit]

Serverside kicks force the server to disconnect a client.

Oversized packets[edit]

Oversized packets are achieved by making the server generate a packet that is too large for it to encode, resulting in the server disconnecting the player.

Such exploits have since been largely patched by PaperMixins[1].

ViaVersion kick exploits[edit]

ViaVersion kick exploits are occasionally the result of ViaVersion bugs, but are usually caused by oversized packet kicks.

Clientside[edit]

Clientside exploits cause unpatched clients to disconnect from the server.

Long commands in command blocks[edit]

When a client opens a command block that contains a large command inside, and attempts to request a completion for it (always done for legacy commands like /sudo), it can be too large for the server to accept and the server will kick the player.

References[edit]