File: check_perms

package info (click to toggle)
mailman 1:2.1.18-2+deb8u2
  • links: PTS, VCS
  • area: main
  • in suites: jessie
  • size: 38,432 kB
  • sloc: python: 25,570; perl: 2,219; makefile: 1,117; sh: 882; ansic: 319
file content (404 lines) | stat: -rwxr-xr-x 13,132 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
#! @PYTHON@
#
# Copyright (C) 1998-2009 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.

"""Check the permissions for the Mailman installation.

Usage: %(PROGRAM)s [-f] [-v] [-h]

With no arguments, just check and report all the files that have bogus
permissions or group ownership.  With -f (and run as root), fix all the
permission problems found.  With -v be verbose.
"""

import os
import sys
import pwd
import grp
import errno
import getopt
from stat import *

try:
    import paths
except ImportError:
    print '''Could not import paths!

This probably means that you are trying to run check_perms from the source
directory.  You must run this from the installation directory instead.
'''
    raise
from Mailman import mm_cfg
from Mailman.mm_cfg import MAILMAN_USER, MAILMAN_GROUP
from Mailman.i18n import _

# Let KeyErrors percolate
MAILMAN_GID = grp.getgrnam(MAILMAN_GROUP)[2]
MAILMAN_UID = pwd.getpwnam(MAILMAN_USER)[2]

PROGRAM = sys.argv[0]

# Gotta check the archives/private/*/database/* files

try:
    True, False
except NameError:
    True = 1
    False = 0



class State:
    FIX = False
    VERBOSE = False
    ERRORS = 0

STATE = State()

DIRPERMS = S_ISGID | S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH
QFILEPERMS = S_ISGID | S_IRWXU | S_IRWXG
PYFILEPERMS = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
ARTICLEFILEPERMS = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP
PRIVATEPERMS = QFILEPERMS



def statmode(path):
    return os.stat(path)[ST_MODE]

def statgidmode(path):
    stat = os.lstat(path)
    return stat[ST_MODE], stat[ST_GID]

seen = {}

# libc's getgrgid re-opens /etc/group each time :(
_gidcache = {}

def getgrgid(gid):
    data = _gidcache.get(gid)
    if data is None:
        data = grp.getgrgid(gid)
        _gidcache[gid] = data
    return data



def checkwalk(arg, dirname, names):
    # Short-circuit duplicates
    if seen.has_key(dirname):
        return
    seen[dirname] = True
    for name in names:
        path = os.path.join(dirname, name)
        if arg.VERBOSE:
            print _('    checking gid and mode for %(path)s')
        try:
            mode, gid = statgidmode(path)
        except OSError, e:
            if e.errno <> errno.ENOENT: raise
            continue
        if gid <> MAILMAN_GID:
            try:
                groupname = getgrgid(gid)[0]
            except KeyError:
                groupname = '<anon gid %d>' % gid
            arg.ERRORS += 1
            print _('%(path)s bad group (has: %(groupname)s, '
                    'expected %(MAILMAN_GROUP)s)'),
            if STATE.FIX:
                print _('(fixing)')
                os.chown(path, -1, MAILMAN_GID)
            else:
                print
        # Most directories must be at least rwxrwsr-x.
        # The private archive directory  and database directory must be at
        # least rwxrws---.  Their 'other' permissions are checked in
        # checkarchives() and checkarchivedbs() below.  Their 'user' and
        # 'group' permissions are checked here.
        # The directories under qfiles should be rwxrws---.  Their 'user' and
        # 'group' permissions are checked here.  Their 'other' permissions
        # aren't checked.
        private = mm_cfg.PRIVATE_ARCHIVE_FILE_DIR
        if path == private or (
            os.path.commonprefix((path, private)) == private
            and os.path.split(path)[1] == 'database'):
            # then...
            targetperms = PRIVATEPERMS
        elif (os.path.commonprefix((path, mm_cfg.QUEUE_DIR))
              == mm_cfg.QUEUE_DIR):
            targetperms = QFILEPERMS
        else:
            targetperms = DIRPERMS
        octperms = oct(targetperms)
        if S_ISDIR(mode) and (mode & targetperms) <> targetperms:
            arg.ERRORS += 1
            print _('directory permissions must be %(octperms)s: %(path)s'),
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(path, mode | targetperms)
            else:
                print
        elif os.path.splitext(path)[1] in ('.py', '.pyc', '.pyo'):
            octperms = oct(PYFILEPERMS)
            if mode & PYFILEPERMS <> PYFILEPERMS:
                print _('source perms must be %(octperms)s: %(path)s'),
                arg.ERRORS += 1
                if STATE.FIX:
                    print _('(fixing)')
                    os.chmod(path, mode | PYFILEPERMS)
                else:
                    print
        elif path.endswith('-article'):
            # Article files must be group writeable
            octperms = oct(ARTICLEFILEPERMS)
            if mode & ARTICLEFILEPERMS <> ARTICLEFILEPERMS:
                print _('article db files must be %(octperms)s: %(path)s'),
                arg.ERRORS += 1
                if STATE.FIX:
                    print _('(fixing)')
                    os.chmod(path, mode | ARTICLEFILEPERMS)
                else:
                    print

def checkall():
    # first check PREFIX
    if STATE.VERBOSE:
        prefix = mm_cfg.PREFIX
        print _('checking mode for %(prefix)s')
    dirs = {}
    for d in (mm_cfg.PREFIX, mm_cfg.EXEC_PREFIX, mm_cfg.VAR_PREFIX,
              mm_cfg.LOG_DIR):
        dirs[d] = True
    for d in dirs.keys():
        try:
            mode = statmode(d)
        except OSError, e:
            if e.errno <> errno.ENOENT: raise
            print _('WARNING: directory does not exist: %(d)s')
            continue
        if (mode & DIRPERMS) <> DIRPERMS:
            STATE.ERRORS += 1
            print _('directory must be at least 02775: %(d)s'),
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(d, mode | DIRPERMS)
            else:
                print
        # check all subdirs
        os.path.walk(d, checkwalk, STATE)

def checkarchives():
    private = mm_cfg.PRIVATE_ARCHIVE_FILE_DIR
    if STATE.VERBOSE:
        print _('checking perms on %(private)s')
    # private archives must not be other readable
    mode = statmode(private)
    if mode & S_IROTH:
        STATE.ERRORS += 1
        print _('%(private)s must not be other-readable'),
        if STATE.FIX:
            print _('(fixing)')
            os.chmod(private, mode & ~S_IROTH)
        else:
            print
    # In addition, on a multiuser system you may want to hide the private
    # archives so other users can't read them.
    if mode & S_IXOTH:
        print _("""\
Warning: Private archive directory is other-executable (o+x).
         This could allow other users on your system to read private archives.
         If you're on a shared multiuser system, you should consult the
         installation manual on how to fix this.""")

MBOXPERMS = S_IRGRP | S_IWGRP | S_IRUSR | S_IWUSR

def checkmboxfile(mboxdir):
    absdir = os.path.join(mm_cfg.PRIVATE_ARCHIVE_FILE_DIR, mboxdir)
    for f in os.listdir(absdir):
        if not f.endswith('.mbox'):
            continue
        mboxfile = os.path.join(absdir, f)
        mode = statmode(mboxfile)
        if (mode & MBOXPERMS) <> MBOXPERMS:
            STATE.ERRORS = STATE.ERRORS + 1
            print _('mbox file must be at least 0660:'), mboxfile
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(mboxfile, mode | MBOXPERMS)
            else:
                print

def checkarchivedbs():
    # The archives/private/listname/database file must not be other readable
    # or executable otherwise those files will be accessible when the archives
    # are public.  That may not be a horrible breach, but let's close this off
    # anyway.
    for dir in os.listdir(mm_cfg.PRIVATE_ARCHIVE_FILE_DIR):
        if dir.endswith('.mbox'):
            checkmboxfile(dir)
        dbdir = os.path.join(mm_cfg.PRIVATE_ARCHIVE_FILE_DIR, dir, 'database')
        try:
            mode = statmode(dbdir)
        except OSError, e:
            if e.errno not in (errno.ENOENT, errno.ENOTDIR): raise
            continue
        if mode & S_IRWXO:
            STATE.ERRORS += 1
            print _('%(dbdir)s "other" perms must be 000'),
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(dbdir, mode & ~S_IRWXO)
            else:
                print

def checkcgi():
    cgidir = os.path.join(mm_cfg.EXEC_PREFIX, 'cgi-bin')
    if STATE.VERBOSE:
        print _('checking cgi-bin permissions')
    exes = os.listdir(cgidir)
    for f in exes:
        path = os.path.join(cgidir, f)
        if STATE.VERBOSE:
            print _('    checking set-gid for %(path)s')
        mode = statmode(path)
        if mode & S_IXGRP and not mode & S_ISGID:
            STATE.ERRORS += 1
            print _('%(path)s must be set-gid'),
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(path, mode | S_ISGID)
            else:
                print

def checkmail():
    wrapper = os.path.join(mm_cfg.WRAPPER_DIR, 'mailman')
    if STATE.VERBOSE:
        print _('checking set-gid for %(wrapper)s')
    mode = statmode(wrapper)
    if not mode & S_ISGID:
        STATE.ERRORS += 1
        print _('%(wrapper)s must be set-gid'),
        if STATE.FIX:
            print _('(fixing)')
            os.chmod(wrapper, mode | S_ISGID)

def checkadminpw():
    for pwfile in (os.path.join(mm_cfg.DATA_DIR, 'adm.pw'),
                   os.path.join(mm_cfg.DATA_DIR, 'creator.pw')):
        targetmode = S_IFREG | S_IRUSR | S_IWUSR | S_IRGRP
        if STATE.VERBOSE:
            print _('checking permissions on %(pwfile)s')
        try:
            mode = statmode(pwfile)
        except OSError, e:
            if e.errno <> errno.ENOENT: raise
            return
        if mode <> targetmode:
            STATE.ERRORS += 1
            octmode = oct(mode)
            print _('%(pwfile)s permissions must be exactly 0640 '
                    '(got %(octmode)s)'),
            if STATE.FIX:
                print _('(fixing)')
                os.chmod(pwfile, targetmode)
            else:
                print

def checkmta():
    if mm_cfg.MTA:
        modname = 'Mailman.MTA.' + mm_cfg.MTA
        __import__(modname)
        try:
            sys.modules[modname].checkperms(STATE)
        except AttributeError:
            pass

def checkdata():
    targetmode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP
    checkfiles = ('config.pck', 'config.pck.last',
                  'config.db', 'config.db.last',
                  'next-digest', 'next-digest-topics',
                  'digest.mbox', 'pending.pck',
                  'request.db', 'request.db.tmp')
    if STATE.VERBOSE:
        print _('checking permissions on list data')
    # BAW: This needs to be converted to the Site module abstraction
    for dir in os.listdir(mm_cfg.LIST_DATA_DIR):
        if not os.path.isdir(os.path.join(mm_cfg.LIST_DATA_DIR, dir)):
            continue
        for file in checkfiles:
            path = os.path.join(mm_cfg.LIST_DATA_DIR, dir, file)
            if STATE.VERBOSE:
                print _('    checking permissions on: %(path)s')
            try:
                mode = statmode(path)
            except OSError, e:
                if e.errno <> errno.ENOENT: raise
                continue
            if (mode & targetmode) <> targetmode:
                STATE.ERRORS += 1
                print _('file permissions must be at least 660: %(path)s'),
                if STATE.FIX:
                    print _('(fixing)')
                    os.chmod(path, mode | targetmode)
                else:
                    print



def usage(code, msg=''):
    if code:
        fd = sys.stderr
    else:
        fd = sys.stdout
    print >> fd, _(__doc__)
    if msg:
        print >> fd, msg
    sys.exit(code)


if __name__ == '__main__':
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'fvh',
                                   ['fix', 'verbose', 'help'])
    except getopt.error, msg:
        usage(1, msg)

    for opt, arg in opts:
        if opt in ('-h', '--help'):
            usage(0)
        elif opt in ('-f', '--fix'):
            STATE.FIX = True
        elif opt in ('-v', '--verbose'):
            STATE.VERBOSE = True

    checkall()
    checkarchives()
    checkarchivedbs()
    checkcgi()
    checkmail()
    checkdata()
    checkadminpw()
    checkmta()

    if not STATE.ERRORS:
        print _('No problems found')
    else:
        print _('Problems found:'), STATE.ERRORS
        print _('Re-run as %(MAILMAN_USER)s (or root) with -f flag to fix')