
I've been using
weechat to connect to IRC
since late 2016 and one
of its killer feature is relays. They let use other frontends like the
Weechat
Android app or the amazing
Glowing Bear (packaged in
Debian Bullseye by yours truly).
Sadly, relays also used to be somewhat of a security risk: anyone with access to
a relay
could run scripts on the machine running
weechat by using
commands such as
/exec or
/script. Not great.
Since version 2.5 (Buster had version 2.3), you can mitigate this
risk by setting a command allowlist for relays. Later versions
implemented a
sane default by blocking the following commands:
/exec
/fset
/set
/unset
/plugin
/script
/python
/perl
/ruby
/lua
/tcl
/guile
/javascript
/php
/secure
/upgrade
/quit
Sadly, this default
didn't make in into Bullseye. If you are
running
weechat and are using the relays feature, after upgrading to
Bullseye, I would recommend you run the following commands in the
weechat
TUI:
/set relay.weechat.commands *,!exec,!fset,!set,!unset,!plugin,!script,!python,!perl,!ruby,!lua,!tcl,!guile,!javascript,!php,!secure,!upgrade,!quit
/save