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- Committer: Package Import Robot
- Author(s): Tyler Hicks
- Date: 2012-05-15 23:28:04 UTC
- Revision ID: package-import@ubuntu.com-20120515232804-2rd0d4k222la647h
Tags: 1.7.4p6-1ubuntu2.1
* SECURITY UPDATE: Properly handle multiple netmasks in sudoers Host and
Host_List values
- debian/patches/CVE-2012-2337.patch: Don't perform IPv6 checks on IPv4
addresses. Based on upstream patch.
- CVE-2012-2337
Host_List values
- debian/patches/CVE-2012-2337.patch: Don't perform IPv6 checks on IPv4
addresses. Based on upstream patch.
- CVE-2012-2337
- files added:
- .pc/CVE-2012-2337.patch
- .pc/debian-changes-1.7.4p6-1
- .pc/enable_badpass.patch
- .pc/hurd-have-getutid.diff
- files removed:
- .pc/CVE-2011-0010.patch
- .pc/debian-changes-1.7.4p4-5
- files modified:
- .pc/applied-patches
added
removed
.pc/debian-changes-1.7.4p4-5/env.c
1
/*
2
* Copyright (c) 2000-2005, 2007-2010
3
* Todd C. Miller <Todd.Miller@courtesan.com>
4
*
5
* Permission to use, copy, modify, and distribute this software for any
6
* purpose with or without fee is hereby granted, provided that the above
7
* copyright notice and this permission notice appear in all copies.
8
*
9
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16
*
17
* Sponsored in part by the Defense Advanced Research Projects
18
* Agency (DARPA) and Air Force Research Laboratory, Air Force
19
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
20
*/
21
22
#include <config.h>
23
24
#include <sys/types.h>
25
#include <sys/param.h>
26
#include <sys/stat.h>
27
#include <stdio.h>
28
#ifdef STDC_HEADERS
29
# include <stdlib.h>
30
# include <stddef.h>
31
#else
32
# ifdef HAVE_STDLIB_H
33
# include <stdlib.h>
34
# endif
35
#endif /* STDC_HEADERS */
36
#ifdef HAVE_STRING_H
37
# include <string.h>
38
#endif /* HAVE_STRING_H */
39
#ifdef HAVE_STRINGS_H
40
# include <strings.h>
41
#endif /* HAVE_STRINGS_H */
42
#ifdef HAVE_UNISTD_H
43
# include <unistd.h>
44
#endif /* HAVE_UNISTD_H */
45
#include <ctype.h>
46
#include <errno.h>
47
#include <pwd.h>
48
49
#include "sudo.h"
50
51
/*
52
* Flags used in rebuild_env()
53
*/
54
#undef DID_TERM
55
#define DID_TERM 0x0001
56
#undef DID_PATH
57
#define DID_PATH 0x0002
58
#undef DID_HOME
59
#define DID_HOME 0x0004
60
#undef DID_SHELL
61
#define DID_SHELL 0x0008
62
#undef DID_LOGNAME
63
#define DID_LOGNAME 0x0010
64
#undef DID_USER
65
#define DID_USER 0x0020
66
#undef DID_USERNAME
67
#define DID_USERNAME 0x0040
68
#undef DID_MAIL
69
#define DID_MAIL 0x0080
70
#undef DID_MAX
71
#define DID_MAX 0x00ff
72
73
#undef KEPT_TERM
74
#define KEPT_TERM 0x0100
75
#undef KEPT_PATH
76
#define KEPT_PATH 0x0200
77
#undef KEPT_HOME
78
#define KEPT_HOME 0x0400
79
#undef KEPT_SHELL
80
#define KEPT_SHELL 0x0800
81
#undef KEPT_LOGNAME
82
#define KEPT_LOGNAME 0x1000
83
#undef KEPT_USER
84
#define KEPT_USER 0x2000
85
#undef KEPT_USERNAME
86
#define KEPT_USERNAME 0x4000
87
#undef KEPT_MAIL
88
#define KEPT_MAIL 0x8000
89
#undef KEPT_MAX
90
#define KEPT_MAX 0xff00
91
92
struct environment {
93
char **envp; /* pointer to the new environment */
94
size_t env_size; /* size of new_environ in char **'s */
95
size_t env_len; /* number of slots used, not counting NULL */
96
int owned; /* do we own envp or is it the system's? */
97
};
98
99
/*
100
* Prototypes
101
*/
102
static void sudo_setenv __P((const char *, const char *, int));
103
static void sudo_putenv __P((char *, int, int));
104
105
extern char **environ; /* global environment */
106
107
/*
108
* Copy of the sudo-managed environment.
109
*/
110
static struct environment env;
111
112
/*
113
* Default table of "bad" variables to remove from the environment.
114
* XXX - how to omit TERMCAP if it starts with '/'?
115
*/
116
static const char *initial_badenv_table[] = {
117
"IFS",
118
"CDPATH",
119
"SHELLOPTS",
120
"PS4",
121
"LOCALDOMAIN",
122
"RES_OPTIONS",
123
"HOSTALIASES",
124
"NLSPATH",
125
"PATH_LOCALE",
126
"LD_*",
127
"_RLD*",
128
#ifdef __hpux
129
"SHLIB_PATH",
130
#endif /* __hpux */
131
#ifdef _AIX
132
"LDR_*",
133
"LIBPATH",
134
"AUTHSTATE",
135
#endif
136
#ifdef __APPLE__
137
"DYLD_*",
138
#endif
139
#ifdef HAVE_KERB4
140
"KRB_CONF*",
141
"KRBCONFDIR",
142
"KRBTKFILE",
143
#endif /* HAVE_KERB4 */
144
#ifdef HAVE_KERB5
145
"KRB5_CONFIG*",
146
"KRB5_KTNAME",
147
#endif /* HAVE_KERB5 */
148
#ifdef HAVE_SECURID
149
"VAR_ACE",
150
"USR_ACE",
151
"DLC_ACE",
152
#endif /* HAVE_SECURID */
153
"TERMINFO", /* terminfo, exclusive path to terminfo files */
154
"TERMINFO_DIRS", /* terminfo, path(s) to terminfo files */
155
"TERMPATH", /* termcap, path(s) to termcap files */
156
"TERMCAP", /* XXX - only if it starts with '/' */
157
"ENV", /* ksh, file to source before script runs */
158
"BASH_ENV", /* bash, file to source before script runs */
159
"PS4", /* bash, prefix for lines in xtrace mode */
160
"GLOBIGNORE", /* bash, globbing patterns to ignore */
161
"SHELLOPTS", /* bash, extra command line options */
162
"JAVA_TOOL_OPTIONS", /* java, extra command line options */
163
"PERLIO_DEBUG ", /* perl, debugging output file */
164
"PERLLIB", /* perl, search path for modules/includes */
165
"PERL5LIB", /* perl 5, search path for modules/includes */
166
"PERL5OPT", /* perl 5, extra command line options */
167
"PERL5DB", /* perl 5, command used to load debugger */
168
"FPATH", /* ksh, search path for functions */
169
"NULLCMD", /* zsh, command for null file redirection */
170
"READNULLCMD", /* zsh, command for null file redirection */
171
"ZDOTDIR", /* zsh, search path for dot files */
172
"TMPPREFIX", /* zsh, prefix for temporary files */
173
"PYTHONHOME", /* python, module search path */
174
"PYTHONPATH", /* python, search path */
175
"PYTHONINSPECT", /* python, allow inspection */
176
"PYTHONUSERBASE", /* python, per user site-packages directory */
177
"RUBYLIB", /* ruby, library load path */
178
"RUBYOPT", /* ruby, extra command line options */
179
NULL
180
};
181
182
/*
183
* Default table of variables to check for '%' and '/' characters.
184
*/
185
static const char *initial_checkenv_table[] = {
186
"COLORTERM",
187
"LANG",
188
"LANGUAGE",
189
"LC_*",
190
"LINGUAS",
191
"TERM",
192
NULL
193
};
194
195
/*
196
* Default table of variables to preserve in the environment.
197
*/
198
static const char *initial_keepenv_table[] = {
199
"COLORS",
200
"DISPLAY",
201
"HOSTNAME",
202
"KRB5CCNAME",
203
"LS_COLORS",
204
"PATH",
205
"PS1",
206
"PS2",
207
"TZ",
208
"XAUTHORITY",
209
"XAUTHORIZATION",
210
NULL
211
};
212
213
/*
214
* Initialize env based on envp.
215
*/
216
void
217
env_init(lazy)
218
int lazy;
219
{
220
char * const *ep;
221
size_t len;
222
223
for (ep = environ; *ep != NULL; ep++)
224
continue;
225
len = (size_t)(ep - environ);
226
227
if (lazy) {
228
/*
229
* If we are already initialized due to lazy init (usualy via getenv())
230
* we need to avoid calling malloc() as it may call getenv() itself.
231
*/
232
env.envp = environ;
233
env.env_len = len;
234
env.env_size = len;
235
} else if (!env.owned) {
236
env.env_len = len;
237
env.env_size = len + 1 + 128;
238
env.envp = emalloc2(env.env_size, sizeof(char *));
239
#ifdef ENV_DEBUG
240
memset(env.envp, 0, env.env_size * sizeof(char *));
241
#endif
242
memcpy(env.envp, environ, len * sizeof(char *));
243
env.envp[len] = '\0';
244
env.owned = TRUE;
245
}
246
}
247
248
char **
249
env_get()
250
{
251
return env.envp;
252
}
253
254
/*
255
* Similar to setenv(3) but operates on sudo's private copy of the environment
256
* (not environ) and it always overwrites. The dupcheck param determines
257
* whether we need to verify that the variable is not already set.
258
*/
259
static void
260
sudo_setenv(var, val, dupcheck)
261
const char *var;
262
const char *val;
263
int dupcheck;
264
{
265
char *estring;
266
size_t esize;
267
268
esize = strlen(var) + 1 + strlen(val) + 1;
269
estring = emalloc(esize);
270
271
/* Build environment string and insert it. */
272
if (strlcpy(estring, var, esize) >= esize ||
273
strlcat(estring, "=", esize) >= esize ||
274
strlcat(estring, val, esize) >= esize) {
275
276
errorx(1, "internal error, sudo_setenv() overflow");
277
}
278
sudo_putenv(estring, dupcheck, TRUE);
279
}
280
281
/*
282
* Version of getenv(3) that uses our own environ pointer.
283
*/
284
char *
285
getenv(var)
286
const char *var;
287
{
288
char *cp, **ev;
289
size_t vlen = strlen(var);
290
291
if (env.envp == NULL)
292
env_init(TRUE);
293
294
for (ev = env.envp; (cp = *ev) != NULL; ev++) {
295
if (strncmp(var, cp, vlen) == 0 && cp[vlen] == '=')
296
return cp + vlen + 1;
297
}
298
return NULL;
299
}
300
301
/*
302
* Version of setenv(3) that uses our own environ pointer.
303
*/
304
int
305
setenv(var, val, overwrite)
306
const char *var;
307
const char *val;
308
int overwrite;
309
{
310
char *estring, *ep;
311
const char *cp;
312
size_t esize;
313
314
if (!var || *var == '\0') {
315
errno = EINVAL;
316
return(-1);
317
}
318
319
if (env.envp == NULL)
320
env_init(TRUE);
321
322
/*
323
* POSIX says a var name with '=' is an error but BSD
324
* just ignores the '=' and anything after it.
325
*/
326
for (cp = var; *cp && *cp != '='; cp++)
327
;
328
esize = (size_t)(cp - var) + 2;
329
if (val) {
330
esize += strlen(val); /* glibc treats a NULL val as "" */
331
}
332
333
/* Allocate and fill in estring. */
334
estring = ep = emalloc(esize);
335
for (cp = var; *cp && *cp != '='; cp++)
336
*ep++ = *cp;
337
*ep++ = '=';
338
if (val) {
339
for (cp = val; *cp; cp++)
340
*ep++ = *cp;
341
}
342
*ep = '\0';
343
344
#ifdef ENV_DEBUG
345
if (env.envp[env.env_len] != NULL)
346
errorx(1, "setenv: corrupted envp, len mismatch");
347
#endif
348
sudo_putenv(estring, TRUE, overwrite);
349
return(0);
350
}
351
352
/*
353
* Version of unsetenv(3) that uses our own environ pointer.
354
*/
355
#ifdef UNSETENV_VOID
356
void
357
#else
358
int
359
#endif
360
unsetenv(var)
361
const char *var;
362
{
363
char **ep;
364
size_t len;
365
366
if (var == NULL || *var == '\0' || strchr(var, '=') != NULL) {
367
errno = EINVAL;
368
#ifdef UNSETENV_VOID
369
return;
370
#else
371
return(-1);
372
#endif
373
}
374
375
if (env.envp == NULL)
376
env_init(TRUE);
377
378
#ifdef ENV_DEBUG
379
if (env.envp[env.env_len] != NULL)
380
errorx(1, "unsetenv: corrupted envp, len mismatch");
381
#endif
382
383
len = strlen(var);
384
for (ep = env.envp; *ep != NULL;) {
385
if (strncmp(var, *ep, len) == 0 && (*ep)[len] == '=') {
386
/* Found it; shift remainder + NULL over by one. */
387
char **cur = ep;
388
while ((*cur = *(cur + 1)) != NULL)
389
cur++;
390
/* Keep going, could be multiple instances of the var. */
391
} else {
392
ep++;
393
}
394
}
395
env.env_len = ep - env.envp;
396
#ifndef UNSETENV_VOID
397
return(0);
398
#endif
399
}
400
401
/*
402
* Version of putenv(3) that uses our own environ pointer.
403
*/
404
int
405
#ifdef PUTENV_CONST
406
putenv(const char *string)
407
#else
408
putenv(string)
409
char *string;
410
#endif
411
{
412
if (env.envp == NULL)
413
env_init(TRUE);
414
415
if (strchr(string, '=') == NULL) {
416
errno = EINVAL;
417
return(-1);
418
}
419
#ifdef ENV_DEBUG
420
if (env.envp[env.env_len] != NULL)
421
errorx(1, "putenv: corrupted envp, len mismatch");
422
#endif
423
sudo_putenv((char *)string, TRUE, TRUE);
424
return(0);
425
}
426
427
/*
428
* Similar to putenv(3) but operates on sudo's private copy of the
429
* environment (not environ) and it always overwrites. The dupcheck param
430
* determines whether we need to verify that the variable is not already set.
431
* Will only overwrite an existing variable if overwrite is set.
432
*/
433
static void
434
sudo_putenv(str, dupcheck, overwrite)
435
char *str;
436
int dupcheck;
437
int overwrite;
438
{
439
char **ep;
440
size_t len;
441
int found = FALSE;
442
443
/* Make sure there is room for the new entry plus a NULL. */
444
if (env.env_len + 2 > env.env_size) {
445
env.env_size += 128;
446
if (env.owned) {
447
env.envp = erealloc3(env.envp, env.env_size, sizeof(char *));
448
} else {
449
/* We don't own env.envp, allocate a new one. */
450
ep = emalloc2(env.env_size, sizeof(char *));
451
memcpy(ep, env.envp, env.env_size * sizeof(char *));
452
env.envp = ep;
453
env.owned = TRUE;
454
}
455
#ifdef ENV_DEBUG
456
memset(env.envp + env.env_len, 0,
457
(env.env_size - env.env_len) * sizeof(char *));
458
#endif
459
}
460
461
#ifdef ENV_DEBUG
462
if (env.envp[env.env_len] != NULL)
463
errorx(1, "sudo_putenv: corrupted envp, len mismatch");
464
#endif
465
466
if (dupcheck) {
467
len = (strchr(str, '=') - str) + 1;
468
for (ep = env.envp; !found && *ep != NULL; ep++) {
469
if (strncmp(str, *ep, len) == 0) {
470
if (overwrite)
471
*ep = str;
472
found = TRUE;
473
}
474
}
475
/* Prune out duplicate variables. */
476
if (found && overwrite) {
477
while (*ep != NULL) {
478
if (strncmp(str, *ep, len) == 0) {
479
char **cur = ep;
480
while ((*cur = *(cur + 1)) != NULL)
481
cur++;
482
} else {
483
ep++;
484
}
485
}
486
env.env_len = ep - env.envp;
487
}
488
}
489
490
if (!found) {
491
ep = env.envp + env.env_len;
492
env.env_len++;
493
*ep++ = str;
494
*ep = NULL;
495
}
496
}
497
498
/*
499
* Check the env_delete blacklist.
500
* Returns TRUE if the variable was found, else false.
501
*/
502
static int
503
matches_env_delete(var)
504
const char *var;
505
{
506
struct list_member *cur;
507
size_t len;
508
int iswild, match = FALSE;
509
510
/* Skip anything listed in env_delete. */
511
for (cur = def_env_delete; cur; cur = cur->next) {
512
len = strlen(cur->value);
513
/* Deal with '*' wildcard */
514
if (cur->value[len - 1] == '*') {
515
len--;
516
iswild = TRUE;
517
} else
518
iswild = FALSE;
519
if (strncmp(cur->value, var, len) == 0 &&
520
(iswild || var[len] == '=')) {
521
match = TRUE;
522
break;
523
}
524
}
525
return(match);
526
}
527
528
/*
529
* Apply the env_check list.
530
* Returns TRUE if the variable is allowed, FALSE if denied
531
* or -1 if no match.
532
*/
533
static int
534
matches_env_check(var)
535
const char *var;
536
{
537
struct list_member *cur;
538
size_t len;
539
int iswild, keepit = -1;
540
541
for (cur = def_env_check; cur; cur = cur->next) {
542
len = strlen(cur->value);
543
/* Deal with '*' wildcard */
544
if (cur->value[len - 1] == '*') {
545
len--;
546
iswild = TRUE;
547
} else
548
iswild = FALSE;
549
if (strncmp(cur->value, var, len) == 0 &&
550
(iswild || var[len] == '=')) {
551
keepit = !strpbrk(var, "/%");
552
break;
553
}
554
}
555
return(keepit);
556
}
557
558
/*
559
* Check the env_keep list.
560
* Returns TRUE if the variable is allowed else FALSE.
561
*/
562
static int
563
matches_env_keep(var)
564
const char *var;
565
{
566
struct list_member *cur;
567
size_t len;
568
int iswild, keepit = FALSE;
569
570
for (cur = def_env_keep; cur; cur = cur->next) {
571
len = strlen(cur->value);
572
/* Deal with '*' wildcard */
573
if (cur->value[len - 1] == '*') {
574
len--;
575
iswild = TRUE;
576
} else
577
iswild = FALSE;
578
if (strncmp(cur->value, var, len) == 0 &&
579
(iswild || var[len] == '=')) {
580
keepit = TRUE;
581
break;
582
}
583
}
584
return(keepit);
585
}
586
587
/*
588
* Build a new environment and ether clear potentially dangerous
589
* variables from the old one or start with a clean slate.
590
* Also adds sudo-specific variables (SUDO_*).
591
*/
592
void
593
rebuild_env(noexec)
594
int noexec;
595
{
596
char **old_envp, **ep, *cp, *ps1;
597
char idbuf[MAX_UID_T_LEN];
598
unsigned int didvar;
599
int reset_home = FALSE;
600
601
/*
602
* Either clean out the environment or reset to a safe default.
603
*/
604
ps1 = NULL;
605
didvar = 0;
606
env.env_len = 0;
607
env.env_size = 128;
608
old_envp = env.envp;
609
env.envp = emalloc2(env.env_size, sizeof(char *));
610
#ifdef ENV_DEBUG
611
memset(env.envp, 0, env.env_size * sizeof(char *));
612
#endif
613
if (def_env_reset || ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
614
/* Reset HOME based on target user unless keeping old value. */
615
reset_home = TRUE;
616
617
/* Pull in vars we want to keep from the old environment. */
618
for (ep = old_envp; *ep; ep++) {
619
int keepit;
620
621
/* Skip variables with values beginning with () (bash functions) */
622
if ((cp = strchr(*ep, '=')) != NULL) {
623
if (strncmp(cp, "=() ", 3) == 0)
624
continue;
625
}
626
627
/*
628
* First check certain variables for '%' and '/' characters.
629
* If no match there, check the keep list.
630
* If nothing matched, we remove it from the environment.
631
*/
632
keepit = matches_env_check(*ep);
633
if (keepit == -1)
634
keepit = matches_env_keep(*ep);
635
636
if (!strncmp (*ep, "DISPLAY=",8)
637
|| !strncmp (*ep, "XAUTHORITY=", 11)
638
|| !strncmp (*ep, "XAUTHORIZATION=", 15)
639
|| !strncmp (*ep, "XAPPLRESDIR=", 12)
640
|| !strncmp (*ep, "XFILESEARCHPATH=", 16)
641
|| !strncmp (*ep, "XUSERFILESEARCHPATH=", 20)
642
|| !strncmp (*ep, "LANG=", 5)
643
|| !strncmp (*ep, "LANGUAGE=", 9)
644
|| !strncmp (*ep, "LC_", 3))
645
keepit = 1;
646
647
/* For SUDO_PS1 -> PS1 conversion. */
648
if (strncmp(*ep, "SUDO_PS1=", 8) == 0)
649
ps1 = *ep + 5;
650
651
if (keepit) {
652
/* Preserve variable. */
653
switch (**ep) {
654
case 'H':
655
if (strncmp(*ep, "HOME=", 5) == 0)
656
SET(didvar, DID_HOME);
657
break;
658
case 'L':
659
if (strncmp(*ep, "LOGNAME=", 8) == 0)
660
SET(didvar, DID_LOGNAME);
661
break;
662
case 'M':
663
if (strncmp(*ep, "MAIL=", 5) == 0)
664
SET(didvar, DID_MAIL);
665
break;
666
case 'P':
667
if (strncmp(*ep, "PATH=", 5) == 0)
668
SET(didvar, DID_PATH);
669
break;
670
case 'S':
671
if (strncmp(*ep, "SHELL=", 6) == 0)
672
SET(didvar, DID_SHELL);
673
break;
674
case 'T':
675
if (strncmp(*ep, "TERM=", 5) == 0)
676
SET(didvar, DID_TERM);
677
break;
678
case 'U':
679
if (strncmp(*ep, "USER=", 5) == 0)
680
SET(didvar, DID_USER);
681
if (strncmp(*ep, "USERNAME=", 5) == 0)
682
SET(didvar, DID_USERNAME);
683
break;
684
}
685
sudo_putenv(*ep, FALSE, FALSE);
686
}
687
}
688
didvar |= didvar << 8; /* convert DID_* to KEPT_* */
689
690
/*
691
* Add in defaults. In -i mode these come from the runas user,
692
* otherwise they may be from the user's environment (depends
693
* on sudoers options).
694
*/
695
if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
696
sudo_setenv("SHELL", runas_pw->pw_shell, ISSET(didvar, DID_SHELL));
697
sudo_setenv("LOGNAME", runas_pw->pw_name,
698
ISSET(didvar, DID_LOGNAME));
699
sudo_setenv("USER", runas_pw->pw_name, ISSET(didvar, DID_USER));
700
sudo_setenv("USERNAME", runas_pw->pw_name,
701
ISSET(didvar, DID_USERNAME));
702
} else {
703
if (!ISSET(didvar, DID_SHELL))
704
sudo_setenv("SHELL", sudo_user.pw->pw_shell, FALSE);
705
if (!ISSET(didvar, DID_LOGNAME))
706
sudo_setenv("LOGNAME", user_name, FALSE);
707
if (!ISSET(didvar, DID_USER))
708
sudo_setenv("USER", user_name, FALSE);
709
if (!ISSET(didvar, DID_USERNAME))
710
sudo_setenv("USERNAME", user_name, FALSE);
711
}
712
/*
713
* Set MAIL to target user in -i mode or if MAIL is not preserved
714
* from user's environment.
715
*/
716
if (ISSET(sudo_mode, MODE_LOGIN_SHELL) || !ISSET(didvar, KEPT_MAIL)) {
717
cp = _PATH_MAILDIR;
718
if (cp[sizeof(_PATH_MAILDIR) - 2] == '/')
719
easprintf(&cp, "MAIL=%s%s", _PATH_MAILDIR, runas_pw->pw_name);
720
else
721
easprintf(&cp, "MAIL=%s/%s", _PATH_MAILDIR, runas_pw->pw_name);
722
sudo_putenv(cp, ISSET(didvar, DID_MAIL), TRUE);
723
}
724
} else {
725
/* Reset HOME based on target user if configured to. */
726
if (ISSET(sudo_mode, MODE_RUN)) {
727
if (def_always_set_home || ISSET(sudo_mode, MODE_RESET_HOME) ||
728
(ISSET(sudo_mode, MODE_SHELL) && def_set_home))
729
reset_home = TRUE;
730
}
731
732
/*
733
* Copy environ entries as long as they don't match env_delete or
734
* env_check.
735
*/
736
for (ep = old_envp; *ep; ep++) {
737
int okvar;
738
739
/* Skip variables with values beginning with () (bash functions) */
740
if ((cp = strchr(*ep, '=')) != NULL) {
741
if (strncmp(cp, "=() ", 3) == 0)
742
continue;
743
}
744
745
/*
746
* First check variables against the blacklist in env_delete.
747
* If no match there check for '%' and '/' characters.
748
*/
749
okvar = matches_env_delete(*ep) != TRUE;
750
if (okvar)
751
okvar = matches_env_check(*ep) != FALSE;
752
753
if (okvar) {
754
if (strncmp(*ep, "SUDO_PS1=", 9) == 0)
755
ps1 = *ep + 5;
756
else if (strncmp(*ep, "PATH=", 5) == 0)
757
SET(didvar, DID_PATH);
758
else if (strncmp(*ep, "TERM=", 5) == 0)
759
SET(didvar, DID_TERM);
760
sudo_putenv(*ep, FALSE, FALSE);
761
}
762
}
763
}
764
/* Replace the PATH envariable with a secure one? */
765
if (def_secure_path && !user_is_exempt()) {
766
sudo_setenv("PATH", def_secure_path, TRUE);
767
SET(didvar, DID_PATH);
768
}
769
770
/* Set $USER, $LOGNAME and $USERNAME to target if "set_logname" is true. */
771
if (def_set_logname && !ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
772
if (!ISSET(didvar, KEPT_LOGNAME))
773
sudo_setenv("LOGNAME", runas_pw->pw_name, TRUE);
774
if (!ISSET(didvar, KEPT_USER))
775
sudo_setenv("USER", runas_pw->pw_name, TRUE);
776
if (!ISSET(didvar, KEPT_USERNAME))
777
sudo_setenv("USERNAME", runas_pw->pw_name, TRUE);
778
}
779
780
/* Set $HOME to target user if not preserving user's value. */
781
if (reset_home && !ISSET(didvar, KEPT_HOME))
782
sudo_setenv("HOME", runas_pw->pw_dir, TRUE);
783
784
/* Provide default values for $TERM and $PATH if they are not set. */
785
if (!ISSET(didvar, DID_TERM))
786
sudo_putenv("TERM=unknown", FALSE, FALSE);
787
if (!ISSET(didvar, DID_PATH))
788
sudo_setenv("PATH", _PATH_STDPATH, FALSE);
789
790
/*
791
* Preload a noexec file? For a list of LD_PRELOAD-alikes, see
792
* http://www.fortran-2000.com/ArnaudRecipes/sharedlib.html
793
* XXX - should prepend to original value, if any
794
*/
795
if (noexec && def_noexec_file != NULL) {
796
#if defined(__darwin__) || defined(__APPLE__)
797
sudo_setenv("DYLD_INSERT_LIBRARIES", def_noexec_file, TRUE);
798
sudo_setenv("DYLD_FORCE_FLAT_NAMESPACE", "", TRUE);
799
#else
800
# if defined(__osf__) || defined(__sgi)
801
easprintf(&cp, "%s:DEFAULT", def_noexec_file);
802
sudo_setenv("_RLD_LIST", cp, TRUE);
803
efree(cp);
804
# else
805
# ifdef _AIX
806
sudo_setenv("LDR_PRELOAD", def_noexec_file, TRUE);
807
# else
808
sudo_setenv("LD_PRELOAD", def_noexec_file, TRUE);
809
# endif /* _AIX */
810
# endif /* __osf__ || __sgi */
811
#endif /* __darwin__ || __APPLE__ */
812
}
813
814
/* Set PS1 if SUDO_PS1 is set. */
815
if (ps1 != NULL)
816
sudo_putenv(ps1, TRUE, TRUE);
817
818
/* Add the SUDO_COMMAND envariable (cmnd + args). */
819
if (user_args) {
820
easprintf(&cp, "%s %s", user_cmnd, user_args);
821
sudo_setenv("SUDO_COMMAND", cp, TRUE);
822
efree(cp);
823
} else {
824
sudo_setenv("SUDO_COMMAND", user_cmnd, TRUE);
825
}
826
827
/* Add the SUDO_USER, SUDO_UID, SUDO_GID environment variables. */
828
sudo_setenv("SUDO_USER", user_name, TRUE);
829
snprintf(idbuf, sizeof(idbuf), "%lu", (unsigned long) user_uid);
830
sudo_setenv("SUDO_UID", idbuf, TRUE);
831
snprintf(idbuf, sizeof(idbuf), "%lu", (unsigned long) user_gid);
832
sudo_setenv("SUDO_GID", idbuf, TRUE);
833
834
/* Free old environment. */
835
efree(old_envp);
836
}
837
838
void
839
insert_env_vars(env_vars)
840
struct list_member *env_vars;
841
{
842
struct list_member *cur;
843
844
/* Add user-specified environment variables. */
845
for (cur = env_vars; cur != NULL; cur = cur->next)
846
putenv(cur->value);
847
}
848
849
/*
850
* Validate the list of environment variables passed in on the command
851
* line against env_delete, env_check, and env_keep.
852
* Calls log_error() if any specified variables are not allowed.
853
*/
854
void
855
validate_env_vars(env_vars)
856
struct list_member *env_vars;
857
{
858
struct list_member *var;
859
char *eq, *bad = NULL;
860
size_t len, blen = 0, bsize = 0;
861
int okvar;
862
863
/* Add user-specified environment variables. */
864
for (var = env_vars; var != NULL; var = var->next) {
865
if (def_secure_path && !user_is_exempt() &&
866
strncmp(var->value, "PATH=", 5) == 0) {
867
okvar = FALSE;
868
} else if (def_env_reset) {
869
okvar = matches_env_check(var->value);
870
if (okvar == -1)
871
okvar = matches_env_keep(var->value);
872
} else {
873
okvar = matches_env_delete(var->value) == FALSE;
874
if (okvar == FALSE)
875
okvar = matches_env_check(var->value) != FALSE;
876
}
877
if (okvar == FALSE) {
878
/* Not allowed, add to error string, allocating as needed. */
879
if ((eq = strchr(var->value, '=')) != NULL)
880
*eq = '\0';
881
len = strlen(var->value) + 2;
882
if (blen + len >= bsize) {
883
do {
884
bsize += 1024;
885
} while (blen + len >= bsize);
886
bad = erealloc(bad, bsize);
887
bad[blen] = '\0';
888
}
889
strlcat(bad, var->value, bsize);
890
strlcat(bad, ", ", bsize);
891
blen += len;
892
if (eq != NULL)
893
*eq = '=';
894
}
895
}
896
if (bad != NULL) {
897
bad[blen - 2] = '\0'; /* remove trailing ", " */
898
log_error(NO_MAIL,
899
"sorry, you are not allowed to set the following environment variables: %s", bad);
900
/* NOTREACHED */
901
efree(bad);
902
}
903
}
904
905
/*
906
* Read in /etc/environment ala AIX and Linux.
907
* Lines may be in either of three formats:
908
* NAME=VALUE
909
* NAME="VALUE"
910
* NAME='VALUE'
911
* with an optional "export" prefix so the shell can source the file.
912
* Invalid lines, blank lines, or lines consisting solely of a comment
913
* character are skipped.
914
*/
915
void
916
read_env_file(path, overwrite)
917
const char *path;
918
int overwrite;
919
{
920
FILE *fp;
921
char *cp, *var, *val;
922
size_t var_len, val_len;
923
924
if ((fp = fopen(path, "r")) == NULL)
925
return;
926
927
while ((var = sudo_parseln(fp)) != NULL) {
928
/* Skip blank or comment lines */
929
if (*var == '\0')
930
continue;
931
932
/* Skip optional "export " */
933
if (strncmp(var, "export", 6) == 0 && isspace((unsigned char) var[6])) {
934
var += 7;
935
while (isspace((unsigned char) *var)) {
936
var++;
937
}
938
}
939
940
/* Must be of the form name=["']value['"] */
941
for (val = var; *val != '\0' && *val != '='; val++)
942
;
943
if (var == val || *val != '=')
944
continue;
945
var_len = (size_t)(val - var);
946
val_len = strlen(++val);
947
948
/* Strip leading and trailing single/double quotes */
949
if ((val[0] == '\'' || val[0] == '\"') && val[0] == val[val_len - 1]) {
950
val[val_len - 1] = '\0';
951
val++;
952
val_len -= 2;
953
}
954
955
cp = emalloc(var_len + 1 + val_len + 1);
956
memcpy(cp, var, var_len + 1); /* includes '=' */
957
memcpy(cp + var_len + 1, val, val_len + 1); /* includes NUL */
958
959
sudo_putenv(cp, TRUE, overwrite);
960
}
961
fclose(fp);
962
}
963
964
void
965
init_envtables()
966
{
967
struct list_member *cur;
968
const char **p;
969
970
/* Fill in the "env_delete" list. */
971
for (p = initial_badenv_table; *p; p++) {
972
cur = emalloc(sizeof(struct list_member));
973
cur->value = estrdup(*p);
974
cur->next = def_env_delete;
975
def_env_delete = cur;
976
}
977
978
/* Fill in the "env_check" list. */
979
for (p = initial_checkenv_table; *p; p++) {
980
cur = emalloc(sizeof(struct list_member));
981
cur->value = estrdup(*p);
982
cur->next = def_env_check;
983
def_env_check = cur;
984
}
985
986
/* Fill in the "env_keep" list. */
987
for (p = initial_keepenv_table; *p; p++) {
988
cur = emalloc(sizeof(struct list_member));
989
cur->value = estrdup(*p);
990
cur->next = def_env_keep;
991
def_env_keep = cur;
992
}
993
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.1