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a81b519d41
## What does this PR do?
Closes a critical hole in the hardline command floor. HARDLINE_PATTERNS is
the unconditional last line of defense: detect_hardline_command runs BEFORE
every yolo / approvals.mode=off / cron approve-mode bypass, so it is the only
gate standing between the agent (or a prompt-injected instruction) and an
irrecoverable disk wipe. The three rm rules anchored on a bare path token,
and _normalize_command_for_detection never strips shell quotes — so the
ordinary, recommended shell idioms slipped straight through:
rm -rf "/" rm -rf '/' rm -rf "/etc"
rm -rf "$HOME" rm -rf ${HOME} rm -rf "${HOME}"
All of these returned NO hardline match. A leading quote pushes the path out
of reach of the flag group, a trailing quote breaks the `(\s|$)` terminator,
and the `${HOME}` brace form was never listed at all. Under --yolo,
approvals.mode=off, or cron approve-mode the dangerous-command layer is also
skipped, so these commands reached execution with zero gate — exactly the
unrecoverable data loss the floor is documented to make impossible. Because
quoting paths and `${HOME}` are normal shell usage, not exotic obfuscation,
this is a high-severity, easily-triggered bypass.
The fix makes the rm path matcher quote- and brace-tolerant while staying
conservative: a path is matched when it is either fully wrapped in its own
matching quote pair (`"/"`) or bare with a whitespace/end terminator. The
matching-quote requirement is deliberate so the change adds no new false
positives — a dangerous-looking string that is merely an argument to another
command (e.g. `git commit -m "rm -rf /"`) has a closing quote but no opening
quote of its own around the path, so neither branch fires.
## Related Issue
N/A
## Type of Change
- [x] 🔒 Security fix
## Changes Made
- `tools/approval.py`: added `_hardline_rm_path()` (matches a destructive
path either fully quoted or bare-with-terminator), factored the protected
system-dir list into `_HARDLINE_SYSTEM_DIRS` and the rm flag prefix into
`_RM_FLAG_PREFIX`, and rebuilt the three rm `HARDLINE_PATTERNS` on top of
them, adding the `${HOME}` brace form. Kept as plain concatenation so regex
backslashes never land inside an f-string field (Python 3.11 floor).
- `tests/tools/test_hardline_blocklist.py`: added quoted (`"/"`, `'/'`,
`"/etc"`, `"$HOME"`, ...) and brace (`${HOME}`, `"${HOME}"`) cases to the
must-block set, a dedicated `_QUOTED_BRACE_BYPASS` regression parametrization,
no-false-positive guards (`git commit -m "rm -rf /"`), and extended the
yolo-cannot-bypass integration test to cover the quoted/brace forms.
## How to Test
1. Reproduce the bypass on `main`: `detect_hardline_command('rm -rf "/"')`
returns `(False, None)` — the floor lets it through.
2. With this change it returns `(True, "recursive delete of root filesystem")`;
the same holds for `'/'`, `"/etc"`, `"$HOME"`, `${HOME}`, `"${HOME}"`.
3. Run the suite: `scripts/run_tests.sh tests/tools/test_hardline_blocklist.py`
— 125 passed, including the new bypass and no-false-positive cases.
## Checklist
### Code
- [x] I've read the Contributing Guide
- [x] My commit messages follow Conventional Commits (`fix(scope):`, etc.)
- [x] I searched for existing PRs to make sure this isn't a duplicate
- [x] My PR contains **only** changes related to this fix (no unrelated commits)
- [x] I've run the relevant tests and they pass
- [x] I've added tests for my changes (required for bug fixes)
- [x] I've tested on my platform: macOS 15 (Darwin 25.5)
### Documentation & Housekeeping
- [x] I've updated relevant documentation (README, `docs/`, docstrings) — or N/A
- [x] I've updated `cli-config.yaml.example` if I added/changed config keys — or N/A
- [x] I've updated `CONTRIBUTING.md` or `AGENTS.md` if I changed architecture or workflows — or N/A
- [x] I've considered cross-platform impact (Windows, macOS) — pattern-only change, ruff + footgun gate pass
- [x] I've updated tool descriptions/schemas if I changed tool behavior — or N/A
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|---|---|---|
| .. | ||
| computer_use | ||
| environments | ||
| neutts_samples | ||
| __init__.py | ||
| ansi_strip.py | ||
| approval.py | ||
| async_delegation.py | ||
| binary_extensions.py | ||
| blueprints.py | ||
| browser_camofox.py | ||
| browser_camofox_state.py | ||
| browser_cdp_tool.py | ||
| browser_dialog_tool.py | ||
| browser_supervisor.py | ||
| browser_tool.py | ||
| budget_config.py | ||
| checkpoint_manager.py | ||
| clarify_gateway.py | ||
| clarify_tool.py | ||
| close_terminal_tool.py | ||
| code_execution_tool.py | ||
| computer_use_tool.py | ||
| credential_files.py | ||
| cronjob_tools.py | ||
| debug_helpers.py | ||
| delegate_tool.py | ||
| discord_tool.py | ||
| env_passthrough.py | ||
| env_probe.py | ||
| fal_common.py | ||
| feishu_doc_tool.py | ||
| feishu_drive_tool.py | ||
| file_operations.py | ||
| file_state.py | ||
| file_tools.py | ||
| fuzzy_match.py | ||
| homeassistant_tool.py | ||
| image_generation_tool.py | ||
| interrupt.py | ||
| kanban_tools.py | ||
| lazy_deps.py | ||
| managed_tool_gateway.py | ||
| mcp_oauth.py | ||
| mcp_oauth_manager.py | ||
| mcp_tool.py | ||
| memory_tool.py | ||
| microsoft_graph_auth.py | ||
| microsoft_graph_client.py | ||
| neutts_synth.py | ||
| openrouter_client.py | ||
| osv_check.py | ||
| patch_parser.py | ||
| path_security.py | ||
| process_registry.py | ||
| project_tools.py | ||
| read_extract.py | ||
| read_terminal_tool.py | ||
| registry.py | ||
| schema_sanitizer.py | ||
| send_message_tool.py | ||
| session_search_tool.py | ||
| skill_manager_tool.py | ||
| skill_provenance.py | ||
| skill_usage.py | ||
| skills_ast_audit.py | ||
| skills_guard.py | ||
| skills_hub.py | ||
| skills_sync.py | ||
| skills_tool.py | ||
| slash_confirm.py | ||
| terminal_tool.py | ||
| thread_context.py | ||
| threat_patterns.py | ||
| tirith_security.py | ||
| todo_tool.py | ||
| tool_backend_helpers.py | ||
| tool_output_limits.py | ||
| tool_result_storage.py | ||
| tool_search.py | ||
| transcription_tools.py | ||
| tts_tool.py | ||
| url_safety.py | ||
| video_generation_tool.py | ||
| vision_tools.py | ||
| voice_mode.py | ||
| web_tools.py | ||
| website_policy.py | ||
| write_approval.py | ||
| x_search_tool.py | ||
| xai_http.py | ||
| xai_video_tools.py | ||
| yuanbao_tools.py | ||