Files
infra/modules/nixos/security/ai-worker-restricted.nix
Hermes 9459839d74 fix: restrict docker commands for ai-worker user
Remove ai-worker from docker group and enforce sudo whitelist.

SECURITY: Being in the docker group gives unrestricted access to the
Docker daemon socket (/var/run/docker.sock), allowing any docker command:
docker exec, docker cp, docker run -v /:/host, docker commit, etc.

Changes:
- Remove extraGroups = ["docker"] from ai-worker user definition
- Add comprehensive sudo NOPASSWD whitelist for safe docker subcommands
  ALLOWED: ps, inspect, logs, images, info, version, stats, start, stop,
  restart, rm, rmi, wait, pull, build, run, compose, system,
  network ls, volume ls
  BLOCKED (implicitly): exec, cp, commit, diff, export, import, load,
  save, attach, push, tag, create, plugin, network create, volume create
- Update ai-worker-restricted.nix module to reflect new approach
- Update README-ai-worker.md with new security model and examples

All docker commands must now be prefixed with sudo.
The Hermes agent's host_run tool needs to be updated to prepend sudo.
2026-05-20 20:34:19 -04:00

25 lines
941 B
Nix

{ config, pkgs, lib, ... }:
with lib;
{
options.services.aiWorkerAccess = mkOption {
type = types.bool;
default = false;
description = "Enable AI worker SSH access with restricted sudo docker commands";
};
config = mkIf config.services.aiWorkerAccess {
# SECURITY: ai-worker is NOT added to docker group.
# Docker access is granted via sudo whitelist in users/ai-worker.nix.
# This prevents unrestricted docker daemon access (docker exec, cp, commit, etc.)
# Only specific docker subcommands are allowed via sudo NOPASSWD rules.
# The old approach (docker group membership) has been removed because:
# - Docker group gives UNRESTRICTED access to the docker daemon socket
# - No way to limit which docker subcommands a docker group member can run
# - Allowed: docker exec, docker cp, docker run -v /:/host, etc.
# users.groups.docker.members = [ "ai-worker" ]; // REMOVED
};
}