If you do jsonrpc over http/s (via xhttp module), then you have the ability to authenticate with digest, like a sip request. The you can also inspect the body of the http request using jannson and add further logic in the event route to forbid some commands and/or check the parameters with desired rules.

If rpc is used over fifo file/unix file sockets or bare udp/tcp sockets, then firewall/os permissions are the options for protection right now.

On 9 Oct 2023, at 15:45, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

The execution of rpc commands has to be protected/firewalled anyhow, there are commands that can kill kamailio or old commands that write to file (e.g, dlg.dump_file). Also, the rpc over fifo writes to a file the response. The rpc interface was designed to be used only by trusted apps, being them restricted by firewal or OS permissions.

I tried to avoid opening the old can of worms, more question if it’s a good thing to continue down that path without protections.

You are right, there are a lot of bad things one can do, so maybe we have to live with it. At some point maybe

add a light level of authorization.

For more flexibility in setting "I want to be able to ..." rules, of course contributions are more than welcome.

As always!

…which is one of the reasons I’m dropping the ideas on the mailing list for everyone to consider… :-)

Cheers,
Daniel

On 09.10.23 14:40, Olle E. Johansson via sr-dev wrote:
On 9 Oct 2023, at 14:08, Daniel-Constantin Mierla via sr-dev <sr-dev@lists.kamailio.org> wrote:

corex: rpc command to print shm status report to file based on filter

How do we restrict this? I find it kind of scary that an external app can force kamailio to write

to files in the file system.

- I want to be able to disable it in modparam

- I want to be able to restrict the directory Kamailio can write in

- I want to be able to restrict sizes

/O
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