Admin Slowhacking

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January 2024

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Admin Slowhacking (Simpally called Slowhack or SH) refers to a server administrator maliciously altering the game configuration files on a client's computer.

GoldSrc games

Slowhacking is provided by AMXX scripting.

client_cmd ( index, const command[], {Float,...} )

client_cmd - Executes command on a player.

Example of harmful slowhacking

client_cmd(id, "developer 1");
client_cmd(id, "unbindall");
client_cmd(id, "rate 1;gl_flipmatrix 1;cl_cmdrate 10;cl_updaterate 10;fps_max 1;hideradar;con_color ^"1 1 1^"");
client_cmd(id, "quit");

Example of harmless slowhacking

Use setinfo as a HTTP cookie.

client_cmd(id, "setinfo ^"lang^" ^"%s^"", pLang);

Blocking

A Counter-Strike update on February 21, 2013, provides protection for players - a cvar cl_filterstuffcmd. [1]

Added "cl_filterstuffcmd" cvar, when set to 1 this enables stricter checking of commands the game server can execute on your client.

List of blocked cvars and commands

cl_filterstuffcmd 0

motd_write
cl_filterstuffcmd
bind
unbind
unbindall
connect

cl_filterstuffcmd 1

gl_*
r_*
hud_*
cl_*
m_*
_restart
_set_vid_level
_setaddons_folder
_setgamedir
_sethdmodels
_setrenderer
_setvideomode
rate
connect
retry
timerefresh
alias
bind
unbind
unbindall
cd
exec
exit
kill
quit
say
setinfo
sensitivity
sys_ticrate
writecfg
removedemo
ex_interp
developer
fps_max
speak_enabled
voice_enable
volume
mp3volume
motd_write

Confirm:However, a bug still makes it possible to make client execute blocked commands. https://github.com/ValveSoftware/halflife/issues/1497

Source games

^[Todo]

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