forked from sektioneins/suhosin
-
Notifications
You must be signed in to change notification settings - Fork 1
/
log.c
442 lines (390 loc) · 12.1 KB
/
log.c
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
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
/*
+----------------------------------------------------------------------+
| Suhosin Version 1 |
+----------------------------------------------------------------------+
| Copyright (c) 2006-2007 The Hardened-PHP Project |
| Copyright (c) 2007-2015 SektionEins GmbH |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Stefan Esser <[email protected]> |
+----------------------------------------------------------------------+
*/
/*
$Id: log.c,v 1.1.1.1 2007-11-28 01:15:35 sesser Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "php_suhosin.h"
#include <fcntl.h>
#include "SAPI.h"
#include "ext/standard/datetime.h"
#include "ext/standard/flock_compat.h"
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#elif defined(PHP_WIN32)
#include "win32/time.h"
#endif
#if defined(PHP_WIN32) || defined(__riscos__) || defined(NETWARE)
#undef AF_UNIX
#endif
#if defined(AF_UNIX)
#include <sys/un.h>
#endif
#define SYSLOG_PATH "/dev/log"
#include "snprintf.h"
#ifdef PHP_WIN32
static HANDLE log_source = 0;
#endif
static char *loglevel2string(int loglevel)
{
switch (loglevel) {
case S_FILES:
return "FILES";
case S_INCLUDE:
return "INCLUDE";
case S_MEMORY:
return "MEMORY";
case S_MISC:
return "MISC";
case S_MAIL:
return "MAIL";
case S_SESSION:
return "SESSION";
case S_SQL:
return "SQL";
case S_EXECUTOR:
return "EXECUTOR";
case S_VARS:
return "VARS";
default:
return "UNKNOWN";
}
}
static char *month_names[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
PHP_SUHOSIN_API void suhosin_log(int loglevel, char *fmt, ...)
{
int s, r, i=0, fd;
long written, towrite;
int getcaller=0;
char *wbuf;
struct timeval tv;
time_t now;
struct tm tm;
#if defined(AF_UNIX)
struct sockaddr_un saun;
#endif
#ifdef PHP_WIN32
LPTSTR strs[2];
unsigned short etype;
DWORD evid;
#endif
char buf[5000] = {0};
char error[5000] = {0};
char *ip_address;
char *fname;
char *alertstring;
int lineno = 0;
va_list ap;
TSRMLS_FETCH();
#if PHP_VERSION_ID >= 50500
getcaller = (loglevel & S_GETCALLER) == S_GETCALLER;
#endif
/* remove the S_GETCALLER flag */
loglevel = loglevel & ~S_GETCALLER;
SDEBUG("(suhosin_log) loglevel: %d log_syslog: %ld - log_sapi: %ld - log_script: %ld", loglevel, SUHOSIN_G(log_syslog), SUHOSIN_G(log_sapi), SUHOSIN_G(log_script));
/* dump core if wanted */
if (SUHOSIN_G(coredump) && loglevel == S_MEMORY) {
volatile unsigned int *x = 0;
volatile int y = *x;
}
if (SUHOSIN_G(log_use_x_forwarded_for)) {
ip_address = suhosin_getenv("HTTP_X_FORWARDED_FOR", 20 TSRMLS_CC);
if (ip_address == NULL) {
ip_address = "X-FORWARDED-FOR not set";
}
} else {
ip_address = suhosin_getenv("REMOTE_ADDR", 11 TSRMLS_CC);
if (ip_address == NULL) {
ip_address = "REMOTE_ADDR not set";
}
}
va_start(ap, fmt);
ap_php_vsnprintf(error, sizeof(error), fmt, ap);
va_end(ap);
if (SUHOSIN_G(log_max_error_length) > 0 && SUHOSIN_G(log_max_error_length) < (sizeof(error) - 4)) {
memcpy(error + SUHOSIN_G(log_max_error_length), "...", 4);
}
while (error[i]) {
if (error[i] < 32) error[i] = '.';
i++;
}
if (SUHOSIN_G(simulation)) {
alertstring = "ALERT-SIMULATION";
} else {
alertstring = "ALERT";
}
if (zend_is_executing(TSRMLS_C)) {
zend_execute_data *exdata = EG(current_execute_data);
if (exdata) {
if (getcaller && exdata->prev_execute_data && exdata->prev_execute_data->opline && exdata->prev_execute_data->op_array) {
lineno = exdata->prev_execute_data->opline->lineno;
fname = (char *)exdata->prev_execute_data->op_array->filename;
} else if (exdata->opline && exdata->op_array) {
lineno = exdata->opline->lineno;
fname = (char *)exdata->op_array->filename;
} else {
lineno = 0;
fname = "[unknown filename]";
}
} else {
lineno = zend_get_executed_lineno(TSRMLS_C);
fname = (char *)zend_get_executed_filename(TSRMLS_C);
}
ap_php_snprintf(buf, sizeof(buf), "%s - %s (attacker '%s', file '%s', line %u)", alertstring, error, ip_address, fname, lineno);
} else {
fname = suhosin_getenv("SCRIPT_FILENAME", 15 TSRMLS_CC);
if (fname==NULL) {
fname = "unknown";
}
ap_php_snprintf(buf, sizeof(buf), "%s - %s (attacker '%s', file '%s')", alertstring, error, ip_address, fname);
}
/* Syslog-Logging disabled? */
if (((SUHOSIN_G(log_syslog)|S_INTERNAL) & loglevel)==0) {
goto log_file;
}
#if defined(AF_UNIX)
ap_php_snprintf(error, sizeof(error), "<%u>suhosin[%u]: %s\n", (unsigned int)(SUHOSIN_G(log_syslog_facility)|SUHOSIN_G(log_syslog_priority)),getpid(),buf);
s = socket(AF_UNIX, SOCK_DGRAM, 0);
if (s == -1) {
goto log_file;
}
memset(&saun, 0, sizeof(saun));
saun.sun_family = AF_UNIX;
strcpy(saun.sun_path, SYSLOG_PATH);
/*saun.sun_len = sizeof(saun);*/
r = connect(s, (struct sockaddr *)&saun, sizeof(saun));
if (r) {
close(s);
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (s == -1) {
goto log_file;
}
memset(&saun, 0, sizeof(saun));
saun.sun_family = AF_UNIX;
strcpy(saun.sun_path, SYSLOG_PATH);
/*saun.sun_len = sizeof(saun);*/
r = connect(s, (struct sockaddr *)&saun, sizeof(saun));
if (r) {
close(s);
goto log_file;
}
}
send(s, error, strlen(error), 0);
close(s);
#endif
#ifdef PHP_WIN32
ap_php_snprintf(error, sizeof(error), "suhosin[%u]: %s", getpid(),buf);
switch (SUHOSIN_G(log_syslog_priority)) { /* translate UNIX type into NT type */
case 1: /*LOG_ALERT:*/
etype = EVENTLOG_ERROR_TYPE;
break;
case 6: /*LOG_INFO:*/
etype = EVENTLOG_INFORMATION_TYPE;
break;
default:
etype = EVENTLOG_WARNING_TYPE;
}
evid = loglevel;
strs[0] = error;
/* report the event */
if (log_source == NULL) {
log_source = RegisterEventSource(NULL, "Suhosin-" SUHOSIN_EXT_VERSION);
}
ReportEvent(log_source, etype, (unsigned short) SUHOSIN_G(log_syslog_priority), evid, NULL, 1, 0, strs, NULL);
#endif
log_file:
/* File-Logging disabled? */
if ((SUHOSIN_G(log_file) & loglevel)==0) {
goto log_sapi;
}
if (!SUHOSIN_G(log_filename) || !SUHOSIN_G(log_filename)[0]) {
goto log_sapi;
}
fd = open(SUHOSIN_G(log_filename), O_CREAT|O_APPEND|O_WRONLY, 0640);
if (fd == -1) {
suhosin_log(S_INTERNAL, "Unable to open logfile: %s", SUHOSIN_G(log_filename));
return;
}
if (SUHOSIN_G(log_file_time)) {
gettimeofday(&tv, NULL);
now = tv.tv_sec;
php_localtime_r(&now, &tm);
ap_php_snprintf(error, sizeof(error), "%s %2d %02d:%02d:%02d [%u] %s\n", month_names[tm.tm_mon], tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, getpid(),buf);
} else {
ap_php_snprintf(error, sizeof(error), "%s\n", buf);
}
towrite = strlen(error);
wbuf = error;
php_flock(fd, LOCK_EX);
while (towrite > 0) {
written = write(fd, wbuf, towrite);
if (written < 0) {
break;
}
towrite -= written;
wbuf += written;
}
php_flock(fd, LOCK_UN);
close(fd);
log_sapi:
/* SAPI Logging activated? */
SDEBUG("(suhosin_log) log_syslog: %ld - log_sapi: %ld - log_script: %ld - log_phpscript: %ld", SUHOSIN_G(log_syslog), SUHOSIN_G(log_sapi), SUHOSIN_G(log_script), SUHOSIN_G(log_phpscript));
if (((SUHOSIN_G(log_sapi)|S_INTERNAL) & loglevel)!=0) {
sapi_module.log_message(buf TSRMLS_CC);
}
if ((SUHOSIN_G(log_stdout) & loglevel)!=0) {
fprintf(stdout, "%s\n", buf);
}
/*log_script:*/
/* script logging activaed? */
if (((SUHOSIN_G(log_script) & loglevel)!=0) && SUHOSIN_G(log_scriptname)!=NULL) {
char cmd[8192], *cmdpos, *bufpos;
FILE *in;
int space;
struct stat st;
char *sname = SUHOSIN_G(log_scriptname);
while (isspace(*sname)) ++sname;
if (*sname == 0) goto log_phpscript;
if (VCWD_STAT(sname, &st) < 0) {
suhosin_log(S_INTERNAL, "unable to find logging shell script %s - file dropped", sname);
goto log_phpscript;
}
if (access(sname, X_OK|R_OK) < 0) {
suhosin_log(S_INTERNAL, "logging shell script %s is not executable - file dropped", sname);
goto log_phpscript;
}
/* TODO: clean up this code to calculate size of output dynamically */
ap_php_snprintf(cmd, sizeof(cmd) - 20, "%s %s \'", sname, loglevel2string(loglevel));
space = sizeof(cmd) - strlen(cmd) - 20;
cmdpos = cmd + strlen(cmd);
bufpos = buf;
if (space <= 1) return;
while (space > 2 && *bufpos) {
if (*bufpos == '\'') {
if (space<=5) break;
*cmdpos++ = '\'';
*cmdpos++ = '\\';
*cmdpos++ = '\'';
*cmdpos++ = '\'';
bufpos++;
space-=4;
} else {
*cmdpos++ = *bufpos++;
space--;
}
}
*cmdpos++ = '\'';
*cmdpos++ = ' ';
*cmdpos++ = '2';
*cmdpos++ = '>';
*cmdpos++ = '&';
*cmdpos++ = '1';
*cmdpos = 0;
if ((in=VCWD_POPEN(cmd, "r"))==NULL) {
suhosin_log(S_INTERNAL, "Unable to execute logging shell script: %s", sname);
goto log_phpscript;
}
/* read and forget the result */
while (1) {
int readbytes = fread(cmd, 1, sizeof(cmd), in);
if (readbytes<=0) {
break;
}
if (strncmp(cmd, "sh: ", 4) == 0) {
/* assume this is an error */
suhosin_log(S_INTERNAL, "Error while executing logging shell script: %s", sname);
pclose(in);
goto log_phpscript;
}
}
pclose(in);
}
log_phpscript:
if ((SUHOSIN_G(log_phpscript) & loglevel)!=0 && EG(in_execution) && SUHOSIN_G(log_phpscriptname) && SUHOSIN_G(log_phpscriptname)[0]) {
zend_file_handle file_handle;
zend_op_array *new_op_array;
zval *result = NULL;
long orig_execution_depth = SUHOSIN_G(execution_depth);
char *orig_basedir = PG(open_basedir);
char *phpscript = SUHOSIN_G(log_phpscriptname);
SDEBUG("scriptname %s", SUHOSIN_G(log_phpscriptname));
if (zend_stream_open(phpscript, &file_handle TSRMLS_CC) == SUCCESS) {
if (!file_handle.opened_path) {
file_handle.opened_path = estrndup(phpscript, strlen(phpscript));
}
new_op_array = zend_compile_file(&file_handle, ZEND_REQUIRE TSRMLS_CC);
zend_destroy_file_handle(&file_handle TSRMLS_CC);
if (new_op_array) {
HashTable *active_symbol_table = EG(active_symbol_table);
zval *zerror, *zerror_class;
if (active_symbol_table == NULL) {
active_symbol_table = &EG(symbol_table);
}
EG(return_value_ptr_ptr) = &result;
EG(active_op_array) = new_op_array;
MAKE_STD_ZVAL(zerror);
MAKE_STD_ZVAL(zerror_class);
ZVAL_STRING(zerror, buf, 1);
ZVAL_LONG(zerror_class, loglevel);
zend_hash_update(active_symbol_table, "SUHOSIN_ERROR", sizeof("SUHOSIN_ERROR"), (void **)&zerror, sizeof(zval *), NULL);
zend_hash_update(active_symbol_table, "SUHOSIN_ERRORCLASS", sizeof("SUHOSIN_ERRORCLASS"), (void **)&zerror_class, sizeof(zval *), NULL);
SUHOSIN_G(execution_depth) = 0;
if (SUHOSIN_G(log_phpscript_is_safe)) {
PG(open_basedir) = NULL;
}
zend_execute(new_op_array TSRMLS_CC);
SUHOSIN_G(execution_depth) = orig_execution_depth;
PG(open_basedir) = orig_basedir;
destroy_op_array(new_op_array TSRMLS_CC);
efree(new_op_array);
if (!EG(exception))
{
if (EG(return_value_ptr_ptr)) {
zval_ptr_dtor(EG(return_value_ptr_ptr));
EG(return_value_ptr_ptr) = NULL;
}
}
} else {
suhosin_log(S_INTERNAL, "Unable to execute logging PHP script: %s", SUHOSIN_G(log_phpscriptname));
return;
}
} else {
suhosin_log(S_INTERNAL, "Unable to execute logging PHP script: %s", SUHOSIN_G(log_phpscriptname));
return;
}
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/