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# -*- coding: utf-8 -*-
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""
Triggers for website isolation.
"""
import os
import subprocess
import logging
# F-17 (CLOS-5955) DiD: this module is reached from the root-side
# CAGEFSCTL_USER dispatch, where proxyexec sets HOME to the caller's
# home directory before the root command runs. Any child process that
# inherits that HOME can be attacked through Python's user-site loader
# (.pth files, sitecustomize) — the SSA regen script has a Python
# shebang, so a bare subprocess.run() with the inherited environment
# turns files under the tenant's home into root code execution before
# the helper body runs. Build the child environment from scratch,
# forwarding only a fixed set of locale/PATH vars and pinning
# PYTHONNOUSERSITE=1 + PYTHONDONTWRITEBYTECODE=1. HOME is intentionally
# NOT forwarded and NOT overridden here — the child starts without a
# HOME env var and lets libc/Python derive it from getpwuid(euid) if
# it needs one (root's own passwd entry, not the tenant's home).
_SAFE_ENV_KEYS = ("PATH", "LANG", "LC_ALL", "LC_CTYPE", "LC_MESSAGES",
"LC_COLLATE", "LC_NUMERIC", "LC_TIME")
def _sanitized_env() -> dict:
env = {k: os.environ[k] for k in _SAFE_ENV_KEYS if k in os.environ}
env.setdefault("PATH", "/usr/sbin:/usr/bin:/sbin:/bin")
env["PYTHONNOUSERSITE"] = "1"
env["PYTHONDONTWRITEBYTECODE"] = "1"
return env
def trigger_xray_ini_regeneration(user: str, domain: str):
"""
Call xray regeneration script if it exists.
This ensures xray.ini files are created in per-website directories
when website isolation is enabled.
"""
xray_regen_script = "/usr/share/alt-php-xray/cloudlinux-xray-regenerate-ini"
if not os.path.isfile(xray_regen_script):
# ok when xray is not installed
logging.debug("xray regeneration script not found: %s", xray_regen_script)
return
try:
subprocess.run(
[xray_regen_script, "--user", user, "--domain", domain],
capture_output=True,
timeout=30,
check=True,
env=_sanitized_env(),
)
except (subprocess.CalledProcessError, subprocess.TimeoutExpired) as e:
logging.warning(f"Failed to regenerate xray ini for {user}: {e.stdout}")
def trigger_ssa_ini_regeneration(user: str):
"""
Call SSA regeneration script if it exists.
This ensures clos_ssa.ini files are created in per-website directories
when website isolation is enabled.
"""
ssa_regen_script = "/usr/share/clos_ssa/regenerate_clos_ssa_ini.py"
if not os.path.isfile(ssa_regen_script):
# ok when ssa is not installed
logging.debug("ssa regeneration script not found: %s", ssa_regen_script)
return
try:
subprocess.run(
[ssa_regen_script, f"--user={user}"],
capture_output=True,
timeout=30,
check=True,
env=_sanitized_env(),
)
except (subprocess.CalledProcessError, subprocess.TimeoutExpired) as e:
logging.warning(f"Failed to regenerate SSA ini for {user}: {e.stdout}")