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f10851e3fd
_CuaDriverSession._call_tool_via_cli() (the EAGAIN/silent-empty MCP fallback transport) invokes `cua-driver call <tool> <json>` via subprocess.run() with no env= argument, so the third-party cua-driver binary inherits the full, unsanitized parent environment. The primary MCP spawn site (_lifecycle_coro) already applies _sanitize_subprocess_env(cua_driver_child_env()) before opening the stdio client, per the same policy #53503/#55709 established for other subprocess spawn points — this fallback path, added alongside the EAGAIN/silent-empty-capture hardening, missed it. Fix: apply the same env=_sanitize_subprocess_env(cua_driver_child_env()) to the subprocess.run() call in _call_tool_via_cli(), mirroring the sanctioned spawn site exactly (telemetry policy applied first, then Hermes-managed secrets filtered).
73 lines
2.8 KiB
Python
73 lines
2.8 KiB
Python
"""Regression test: the cua-driver CLI-fallback transport must sanitize the
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subprocess environment like every other cua-driver spawn site.
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``_CuaDriverSession._call_tool_via_cli()`` (the EAGAIN/silent-empty MCP
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fallback) invoked ``subprocess.run`` with no ``env=`` at all, so the
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third-party ``cua-driver`` binary inherited the full, unsanitized parent
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environment — including provider API keys and other Hermes-managed
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secrets that ``_lifecycle_coro``'s primary MCP spawn already strips via
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``_sanitize_subprocess_env(cua_driver_child_env())``.
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"""
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import json
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from unittest.mock import MagicMock
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from tools.computer_use.cua_backend import _CuaDriverSession
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def _make_session() -> _CuaDriverSession:
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# _call_tool_via_cli() doesn't touch any instance state (bridge/session/
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# capabilities); bypass __init__ so the test doesn't need a real
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# _AsyncBridge.
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return object.__new__(_CuaDriverSession)
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def _fake_completed_process(stdout: str) -> MagicMock:
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proc = MagicMock()
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proc.stdout = stdout
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proc.stderr = ""
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proc.returncode = 0
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return proc
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def test_cli_fallback_strips_provider_secret_from_subprocess_env(monkeypatch):
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monkeypatch.setenv("ANTHROPIC_API_KEY", "sk-super-secret-should-not-leak")
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monkeypatch.setenv("PATH", "/usr/bin:/bin")
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captured = {}
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def fake_run(cmd, **kwargs):
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captured["env"] = kwargs.get("env")
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return _fake_completed_process(json.dumps({"tree_markdown": "root"}))
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monkeypatch.setattr("subprocess.run", fake_run)
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session = _make_session()
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result = session._call_tool_via_cli("list_windows", {}, timeout=5.0)
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assert result["isError"] is False
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assert captured["env"] is not None, "subprocess.run must receive an explicit env="
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assert "ANTHROPIC_API_KEY" not in captured["env"]
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# Sanitization filters secrets, not everything — an ordinary var survives.
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assert captured["env"].get("PATH") == "/usr/bin:/bin"
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def test_cli_fallback_applies_telemetry_policy(monkeypatch):
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"""The env should also go through cua_driver_child_env(), like every
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other cua-driver spawn site, not just _sanitize_subprocess_env alone."""
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monkeypatch.delenv("HERMES_CUA_TELEMETRY", raising=False)
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captured = {}
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def fake_run(cmd, **kwargs):
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captured["env"] = kwargs.get("env")
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return _fake_completed_process(json.dumps({"tree_markdown": "root"}))
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monkeypatch.setattr("subprocess.run", fake_run)
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session = _make_session()
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session._call_tool_via_cli("list_windows", {}, timeout=5.0)
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# cua_driver_child_env() injects this when telemetry is disabled
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# (the default) — confirms the fallback goes through the same helper
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# the sanctioned spawn site uses, not an ad hoc env dict.
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assert captured["env"].get("CUA_DRIVER_RS_TELEMETRY_ENABLED") == "0"
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