Inappropriate implementation in Passwords in Google Chrome prior to 149

#!/usr/bin/env python3
# check_chrome_149.py
# Detect whether locally installed Google Chrome is below 149.0.7827.53.
# Exit codes: 0=PATCHED, 1=VULNERABLE, 2=UNKNOWN

import os
import platform
import re
import shutil
import subprocess
import sys

FIXED = (149, 0, 7827, 53)


def parse_version(text):
    m = re.search(r'(\d+)\.(\d+)\.(\d+)\.(\d+)', text)
    if not m:
        return None
    return tuple(int(x) for x in m.groups())


def run_cmd(cmd):
    try:
        p = subprocess.run(cmd, capture_output=True, text=True, timeout=10)
        out = (p.stdout or '') + ' ' + (p.stderr or '')
        return out.strip()
    except Exception:
        return ''


def compare_versions(a, b):
    return (a > b) - (a < b)


def get_windows_version():
    # Try registry first
    try:
        import winreg
        reg_paths = [
            (winreg.HKEY_CURRENT_USER, r'Software\Google\Chrome\BLBeacon'),
            (winreg.HKEY_LOCAL_MACHINE, r'Software\Google\Chrome\BLBeacon'),
            (winreg.HKEY_LOCAL_MACHINE, r'Software\WOW6432Node\Google\Chrome\BLBeacon'),
        ]
        for hive, path in reg_paths:
            try:
                with winreg.OpenKey(hive, path) as key:
                    val, _ = winreg.QueryValueEx(key, 'version')
                    ver = parse_version(str(val))
                    if ver:
                        return ver, f'registry:{path}'
            except OSError:
                pass
    except Exception:
        pass

    # Fall back to executable --version
    candidates = [
        os.path.expandvars(r'%ProgramFiles%\Google\Chrome\Application\chrome.exe'),
        os.path.expandvars(r'%ProgramFiles(x86)%\Google\Chrome\Application\chrome.exe'),
        os.path.expandvars(r'%LocalAppData%\Google\Chrome\Application\chrome.exe'),
    ]
    for exe in candidates:
        if exe and os.path.exists(exe):
            out = run_cmd([exe, '--version'])
            ver = parse_version(out)
            if ver:
                return ver, exe
    return None, ''


def get_macos_version():
    candidates = [
        '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
        os.path.expanduser('~/Applications/Google Chrome.app/Contents/MacOS/Google Chrome'),
    ]
    for exe in candidates:
        if os.path.exists(exe):
            out = run_cmd([exe, '--version'])
            ver = parse_version(out)
            if ver:
                return ver, exe
    return None, ''


def get_linux_version():
    cmds = [
        ['google-chrome', '--version'],
        ['google-chrome-stable', '--version'],
        ['/opt/google/chrome/chrome', '--version'],
    ]
    for cmd in cmds:
        exe = cmd[0]
        if os.path.isabs(exe) and not os.path.exists(exe):
            continue
        if not os.path.isabs(exe) and shutil.which(exe) is None:
            continue
        out = run_cmd(cmd)
        ver = parse_version(out)
        if ver:
            return ver, exe
    return None, ''


def main():
    system = platform.system().lower()
    if 'windows' in system:
        ver, source = get_windows_version()
    elif 'darwin' in system:
        ver, source = get_macos_version()
    elif 'linux' in system:
        ver, source = get_linux_version()
    else:
        print('UNKNOWN - unsupported platform')
        sys.exit(2)

    if not ver:
        print('UNKNOWN - Google Chrome version not found')
        sys.exit(2)

    current = '.'.join(str(x) for x in ver)
    fixed = '.'.join(str(x) for x in FIXED)

    if compare_versions(ver, FIXED) < 0:
        print(f'VULNERABLE - installed Chrome {current} from {source}; fixed version is {fixed} or later')
        sys.exit(1)
    else:
        print(f'PATCHED - installed Chrome {current} from {source}; fixed baseline is {fixed}')
        sys.exit(0)


if __name__ == '__main__':
    main()