Fix __darwinAllowLocalNetworking sandbox
#10078
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The sandbox rule `(allow network* (local ip))` doesn't do what it implies. Adding this rule permits all network traffic. We should be matching on (remote ip "localhost:*")` instead.
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This pull request has been mentioned on NixOS Discourse. There might be relevant details there: https://discourse.nixos.org/t/2024-03-04-nix-team-meeting-minute-130/40830/1 |
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Motivation
The sandbox rule
(allow network* (local ip))doesn't do what it implies. Using this rule permits all network traffic. We should be matching on(remote ip "localhost:*")instead.Context
This is a first step towards fixing #6049
Similar issue experienced in Bazel bazelbuild/bazel#10068.
It's hard to tell because the sandbox is notoriously poorly documented by Apple, but it seems likely that this was working at some point and Apple made a breaking change. Either way, this has been a reported issue since at least 2019 (by other build systems), so I think it's safe to say that MacOS versions where this might still work are obsolete by now.
I tested the following scenarios with
netcaton MacOS 14.3.1 (23D60) usingsandbox-exec -f sandbox-defaults.sb ...:_ALLOW_LOCAL_NETWORKING=1Priorities and Process
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