586f74b929
Replace MIT with the full GNU GPLv3 text, update license metadata in pyproject.toml (+ trove classifiers) and PKGBUILD, and add SPDX-License-Identifier headers to all Python modules and shell scripts. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
# SPDX-License-Identifier: GPL-3.0-or-later
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"""new_suid — a SUID/SGID binary that wasn't in the baseline.
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A new setuid binary is a privilege-escalation persistence trick; one in a
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world-writable dir (``/tmp``, ``/home`` …) is almost never legitimate, so it is
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escalated to CRITICAL. The filesystem walk is expensive, so the daemon only
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populates ``state.suid_binaries`` on its slow scan cadence — when it's absent
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this detector is a no-op.
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"""
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from __future__ import annotations
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from collections.abc import Iterator
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from ..alert import Alert, Severity
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from ..config import Config
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from ..system import SystemState
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def detect(state: SystemState, cfg: Config) -> Iterator[Alert]:
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if state.suid_binaries is None or state.suid_baseline is None:
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return
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for path in state.suid_binaries:
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if path in state.suid_baseline:
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continue
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hot = any(
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path.startswith(d.rstrip("/") + "/") for d in cfg.suid_hot_dirs
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)
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yield Alert(
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severity=Severity.CRITICAL if hot else Severity.HIGH,
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signature="new_suid",
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key=f"suid:{path}",
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detail=(
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("SUID/SGID binary in writable dir: " if hot
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else "new SUID/SGID binary: ") + path
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),
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)
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