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execute.c
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/*
+----------------------------------------------------------------------+
| Suhosin Version 1 |
+----------------------------------------------------------------------+
| Copyright (c) 2006-2007 The Hardened-PHP Project |
| Copyright (c) 2007-2014 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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Stefan Esser <sesser@sektioneins.de> |
+----------------------------------------------------------------------+
*/
/* $Id: execute.c,v 1.1.1.1 2007-11-28 01:15:35 sesser Exp $ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <fcntl.h>
#include "php.h"
#include "php_ini.h"
#include "zend_hash.h"
#include "zend_extensions.h"
#include "ext/standard/info.h"
#include "ext/standard/php_rand.h"
#include "ext/standard/php_lcg.h"
#include "php_suhosin.h"
#include "zend_compile.h"
#include "zend_llist.h"
#include "SAPI.h"
#include "sha256.h"
#ifdef PHP_WIN32
# include "win32/fnmatch.h"
# include "win32/winutil.h"
# include "win32/time.h"
#else
# ifdef HAVE_FNMATCH
# include <fnmatch.h>
# endif
# include <sys/time.h>
#endif
#if PHP_VERSION_ID >= 50500
static void (*old_execute_ex)(zend_execute_data *execute_data TSRMLS_DC);
static void suhosin_execute_ex(zend_execute_data *execute_data TSRMLS_DC);
#endif
static void (*old_execute)(zend_op_array *op_array TSRMLS_DC);
static void suhosin_execute(zend_op_array *op_array TSRMLS_DC);
static void (*old_execute_ZO)(zend_op_array *op_array, long dummy TSRMLS_DC);
static void suhosin_execute_ZO(zend_op_array *op_array, long dummy TSRMLS_DC);
static void *(*zo_set_oe_ex)(void *ptr) = NULL;
/*STATIC zend_op_array* (*old_compile_file)(zend_file_handle* file_handle, int type TSRMLS_DC);
STATIC zend_op_array* suhosin_compile_file(zend_file_handle*, int TSRMLS_DC);*/
#if PHP_VERSION_ID >= 50500
static void suhosin_execute_internal(zend_execute_data *execute_data_ptr, zend_fcall_info *fci, int return_value_used TSRMLS_DC);
static void (*old_execute_internal)(zend_execute_data *execute_data_ptr, zend_fcall_info *fci, int return_value_used TSRMLS_DC);
#else
static void suhosin_execute_internal(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
static void (*old_execute_internal)(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
#endif
extern zend_extension suhosin_zend_extension_entry;
/* {{{ suhosin_strcasestr */
static char *suhosin_strcasestr(char *haystack, char *needle)
{
unsigned char *t, *h, *n;
h = (unsigned char *) haystack;
conts:
while (*h) {
n = (unsigned char *) needle;
if (toupper(*h++) == toupper(*n++)) {
for (t=h; *n; t++, n++) {
if (toupper(*t) != toupper(*n)) goto conts;
}
return ((char*)h-1);
}
}
return (NULL);
}
/* }}} */
#define SUHOSIN_CODE_TYPE_UNKNOWN 0
#define SUHOSIN_CODE_TYPE_COMMANDLINE 1
#define SUHOSIN_CODE_TYPE_EVAL 2
#define SUHOSIN_CODE_TYPE_REGEXP 3
#define SUHOSIN_CODE_TYPE_ASSERT 4
#define SUHOSIN_CODE_TYPE_CFUNC 5
#define SUHOSIN_CODE_TYPE_SUHOSIN 6
#define SUHOSIN_CODE_TYPE_UPLOADED 7
#define SUHOSIN_CODE_TYPE_0FILE 8
#define SUHOSIN_CODE_TYPE_BLACKURL 9
#define SUHOSIN_CODE_TYPE_BADURL 10
#define SUHOSIN_CODE_TYPE_GOODFILE 11
#define SUHOSIN_CODE_TYPE_BADFILE 12
#define SUHOSIN_CODE_TYPE_LONGNAME 13
#define SUHOSIN_CODE_TYPE_MANYDOTS 14
#define SUHOSIN_CODE_TYPE_WRITABLE 15
#define SUHOSIN_CODE_TYPE_MBREGEXP 16
static int suhosin_check_filename(char *s, int len TSRMLS_DC)
{
char fname[MAXPATHLEN+1];
char *t, *h, *h2, *index, *e;
int tlen, i, count=0;
uint indexlen;
ulong numindex;
zend_bool isOk;
/* check if filename is too long */
if (len > MAXPATHLEN) {
return SUHOSIN_CODE_TYPE_LONGNAME;
}
memcpy(fname, s, len);
fname[len] = 0;
s = (char *)&fname;
e = s + len;
/* check if ASCIIZ attack -> not working yet (and cannot work in PHP4 + ZO) */
if (len != strlen(s)) {
return SUHOSIN_CODE_TYPE_0FILE;
}
/* disallow uploaded files */
if (SG(rfc1867_uploaded_files)) {
if (zend_hash_exists(SG(rfc1867_uploaded_files), (char *) s, e-s+1)) {
return SUHOSIN_CODE_TYPE_UPLOADED;
}
}
/* count number of directory traversals */
for (i=0; i < len-3; i++) {
if (s[i] == '.' && s[i+1] == '.' && (s[i+2] == '/' || s[i+2] == '\\')) {
count++;
i+=2;
}
}
if (SUHOSIN_G(executor_include_max_traversal) && SUHOSIN_G(executor_include_max_traversal)<=count) {
return SUHOSIN_CODE_TYPE_MANYDOTS;
}
SDEBUG("xxx %p %p",SUHOSIN_G(include_whitelist),SUHOSIN_G(include_blacklist));
/* no black or whitelist then disallow all */
if (SUHOSIN_G(include_whitelist)==NULL && SUHOSIN_G(include_blacklist)==NULL) {
/* disallow all URLs */
if (strstr(s, "://") != NULL || suhosin_strcasestr(s, "data:") != NULL) {
return SUHOSIN_CODE_TYPE_BADURL;
}
} else
/* whitelist is stronger than blacklist */
if (SUHOSIN_G(include_whitelist)) {
do {
isOk = 0;
h = strstr(s, "://");
h2 = suhosin_strcasestr(s, "data:");
h2 = h2 == NULL ? NULL : h2 + 4;
t = h = (h == NULL) ? h2 : ( (h2 == NULL) ? h : ( (h < h2) ? h : h2 ) );
if (h == NULL) break;
while (t > s && (isalnum(t[-1]) || t[-1]=='_' || t[-1]=='.')) {
t--;
}
tlen = e-t;
zend_hash_internal_pointer_reset(SUHOSIN_G(include_whitelist));
do {
int r = zend_hash_get_current_key_ex(SUHOSIN_G(include_whitelist), &index, &indexlen, &numindex, 0, NULL);
if (r==HASH_KEY_NON_EXISTANT) {
break;
}
if (r==HASH_KEY_IS_STRING) {
if (h-t <= indexlen-1 && tlen>=indexlen-1) {
if (strncasecmp(t, index, indexlen-1)==0) {
isOk = 1;
break;
}
}
}
zend_hash_move_forward(SUHOSIN_G(include_whitelist));
} while (1);
/* not found in whitelist */
if (!isOk) {
return SUHOSIN_CODE_TYPE_BADURL;
}
s = h + 1;
} while (1);
} else {
do {
int tlen;
h = strstr(s, "://");
h2 = suhosin_strcasestr(s, "data:");
h2 = h2 == NULL ? NULL : h2 + 4;
t = h = (h == NULL) ? h2 : ( (h2 == NULL) ? h : ( (h < h2) ? h : h2 ) );
if (h == NULL) break;
while (t > s && (isalnum(t[-1]) || t[-1]=='_' || t[-1]=='.')) {
t--;
}
tlen = e-t;
zend_hash_internal_pointer_reset(SUHOSIN_G(include_blacklist));
do {
int r = zend_hash_get_current_key_ex(SUHOSIN_G(include_blacklist), &index, &indexlen, &numindex, 0, NULL);
if (r==HASH_KEY_NON_EXISTANT) {
break;
}
if (r==HASH_KEY_IS_STRING) {
if (h-t <= indexlen-1 && tlen>=indexlen-1) {
if (strncasecmp(t, index, indexlen-1)==0) {
return SUHOSIN_CODE_TYPE_BLACKURL;
}
}
}
zend_hash_move_forward(SUHOSIN_G(include_blacklist));
} while (1);
s = h + 1;
} while (1);
}
/* disallow writable files */
if (!SUHOSIN_G(executor_include_allow_writable_files)) {
/* protection against *REMOTE* attacks, potential
race condition of access() is irrelevant */
if (access(s, W_OK) == 0) {
return SUHOSIN_CODE_TYPE_WRITABLE;
}
}
return SUHOSIN_CODE_TYPE_GOODFILE;
}
#ifdef ZEND_ENGINE_2
static int (*old_zend_stream_open)(const char *filename, zend_file_handle *fh TSRMLS_DC);
#else
static zend_bool (*old_zend_open)(const char *filename, zend_file_handle *fh);
#endif
#ifdef ZEND_ENGINE_2
static int suhosin_zend_stream_open(const char *filename, zend_file_handle *fh TSRMLS_DC)
{
zend_execute_data *exd;
#else
static zend_bool suhosin_zend_open(const char *filename, zend_file_handle *fh)
{
zend_execute_data *exd;
TSRMLS_FETCH();
#endif
exd=EG(current_execute_data);
if (EG(in_execution) && (exd!=NULL) && (exd->opline != NULL) && (exd->opline->opcode == ZEND_INCLUDE_OR_EVAL)) {
int filetype = suhosin_check_filename((char *)filename, strlen(filename) TSRMLS_CC);
switch (filetype) {
case SUHOSIN_CODE_TYPE_LONGNAME:
suhosin_log(S_INCLUDE, "Include filename ('%s') is too long", filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_UPLOADED:
suhosin_log(S_INCLUDE, "Include filename is an uploaded file");
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_0FILE:
suhosin_log(S_INCLUDE, "Include filename contains an ASCIIZ character");
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_WRITABLE:
suhosin_log(S_INCLUDE, "Include filename ('%s') is writable by PHP process", filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_BLACKURL:
suhosin_log(S_INCLUDE, "Include filename ('%s') is an URL that is forbidden by the blacklist", filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_BADURL:
suhosin_log(S_INCLUDE, "Include filename ('%s') is an URL that is not allowed", filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_MANYDOTS:
suhosin_log(S_INCLUDE, "Include filename ('%s') contains too many '../'", filename);
suhosin_bailout(TSRMLS_C);
break;
}
}
#ifdef ZEND_ENGINE_2
return old_zend_stream_open(filename, fh TSRMLS_CC);
#else
return old_zend_open(filename, fh);
#endif
}
static int suhosin_detect_codetype(zend_op_array *op_array TSRMLS_DC)
{
char *s;
int r;
s = (char *)op_array->filename;
/* eval, assert, create_function, preg_replace */
if (op_array->type == ZEND_EVAL_CODE) {
if (s == NULL) {
return SUHOSIN_CODE_TYPE_UNKNOWN;
}
if (strstr(s, "eval()'d code") != NULL) {
return SUHOSIN_CODE_TYPE_EVAL;
}
if (strstr(s, "regexp code") != NULL) {
return SUHOSIN_CODE_TYPE_REGEXP;
}
if (strstr(s, "mbregex replace") != NULL) {
return SUHOSIN_CODE_TYPE_MBREGEXP;
}
if (strstr(s, "assert code") != NULL) {
return SUHOSIN_CODE_TYPE_ASSERT;
}
if (strstr(s, "runtime-created function") != NULL) {
return SUHOSIN_CODE_TYPE_CFUNC;
}
if (strstr(s, "Command line code") != NULL) {
return SUHOSIN_CODE_TYPE_COMMANDLINE;
}
if (strstr(s, "Command line begin code") != NULL) {
return SUHOSIN_CODE_TYPE_COMMANDLINE;
}
if (strstr(s, "Command line run code") != NULL) {
return SUHOSIN_CODE_TYPE_COMMANDLINE;
}
if (strstr(s, "Command line end code") != NULL) {
return SUHOSIN_CODE_TYPE_COMMANDLINE;
}
if (strstr(s, "suhosin internal code") != NULL) {
return SUHOSIN_CODE_TYPE_SUHOSIN;
}
} else {
r = suhosin_check_filename(s, strlen(s) TSRMLS_CC);
/* switch (r) {
case SUHOSIN_CODE_TYPE_GOODFILE:
break;
} */
return r;
}
return SUHOSIN_CODE_TYPE_UNKNOWN;
}
/* {{{ void suhosin_execute_ex(zend_op_array *op_array TSRMLS_DC)
* This function provides a hook for execution */
#if PHP_VERSION_ID > 50500
static void suhosin_execute_ex(zend_execute_data *execute_data TSRMLS_DC)
{
zend_op_array *op_array = execute_data->op_array;
#else
static void suhosin_execute_ex(zend_op_array *op_array, int zo, long dummy TSRMLS_DC)
{
#endif
zend_op_array *new_op_array;
int op_array_type, len;
char *fn;
zval cs;
zend_uint orig_code_type;
unsigned long *suhosin_flags = NULL;
/* log variable dropping statistics */
if (SUHOSIN_G(abort_request)) {
SUHOSIN_G(abort_request) = 0; /* we only want this to happen the first time */
if (SUHOSIN_G(att_request_variables)-SUHOSIN_G(cur_request_variables) > 0) {
suhosin_log(S_VARS, "dropped %u request variables - (%u in GET, %u in POST, %u in COOKIE)",
SUHOSIN_G(att_request_variables)-SUHOSIN_G(cur_request_variables),
SUHOSIN_G(att_get_vars)-SUHOSIN_G(cur_get_vars),
SUHOSIN_G(att_post_vars)-SUHOSIN_G(cur_post_vars),
SUHOSIN_G(att_cookie_vars)-SUHOSIN_G(cur_cookie_vars));
}
if (!SUHOSIN_G(simulation) && SUHOSIN_G(filter_action)) {
char *action = SUHOSIN_G(filter_action);
long code = -1;
while (*action == ' ' || *action == '\t') action++;
if (*action >= '0' && *action <= '9') {
char *end = action;
while (*end && *end != ',' && *end != ';') end++;
code = zend_atoi(action, end-action);
action = end;
}
while (*action == ' ' || *action == '\t' || *action == ',' || *action == ';') action++;
if (*action) {
if (strncmp("http://", action, sizeof("http://")-1)==0) {
sapi_header_line ctr = {0};
if (code == -1) {
code = 302;
}
ctr.line_len = spprintf(&ctr.line, 0, "Location: %s", action);
ctr.response_code = code;
sapi_header_op(SAPI_HEADER_REPLACE, &ctr TSRMLS_CC);
efree(ctr.line);
} else {
zend_file_handle file_handle;
zend_op_array *new_op_array;
zval *result = NULL;
if (code == -1) {
code = 200;
}
#ifdef ZEND_ENGINE_2
if (zend_stream_open(action, &file_handle TSRMLS_CC) == SUCCESS) {
#else
if (zend_open(action, &file_handle) == SUCCESS && ZEND_IS_VALID_FILE_HANDLE(&file_handle)) {
file_handle.filename = action;
file_handle.free_filename = 0;
#endif
if (!file_handle.opened_path) {
file_handle.opened_path = estrndup(action, strlen(action));
}
new_op_array = zend_compile_file(&file_handle, ZEND_REQUIRE TSRMLS_CC);
zend_destroy_file_handle(&file_handle TSRMLS_CC);
if (new_op_array) {
EG(return_value_ptr_ptr) = &result;
EG(active_op_array) = new_op_array;
zend_execute(new_op_array TSRMLS_CC);
#ifdef ZEND_ENGINE_2
destroy_op_array(new_op_array TSRMLS_CC);
#else
destroy_op_array(new_op_array);
#endif
efree(new_op_array);
#ifdef ZEND_ENGINE_2
if (!EG(exception))
#endif
{
if (EG(return_value_ptr_ptr)) {
zval_ptr_dtor(EG(return_value_ptr_ptr));
EG(return_value_ptr_ptr) = NULL;
}
}
} else {
code = 500;
}
} else {
code = 500;
}
}
}
sapi_header_op(SAPI_HEADER_SET_STATUS, (void *)code TSRMLS_CC);
zend_bailout();
}
}
SDEBUG("%s %s", op_array->filename, op_array->function_name);
SUHOSIN_G(execution_depth)++;
if (SUHOSIN_G(max_execution_depth) && SUHOSIN_G(execution_depth) > SUHOSIN_G(max_execution_depth)) {
suhosin_log(S_EXECUTOR|S_GETCALLER, "maximum execution depth reached - script terminated");
suhosin_bailout(TSRMLS_C);
}
fn = (char *)op_array->filename;
len = strlen(fn);
orig_code_type = SUHOSIN_G(in_code_type);
if (op_array->type == ZEND_EVAL_CODE) {
SUHOSIN_G(in_code_type) = SUHOSIN_EVAL;
} else {
if (suhosin_zend_extension_entry.resource_number != -1) {
suhosin_flags = (unsigned long *) &op_array->reserved[suhosin_zend_extension_entry.resource_number];
SDEBUG("suhosin flags: %08lx", *suhosin_flags);
if (*suhosin_flags & SUHOSIN_FLAG_CREATED_BY_EVAL) {
SUHOSIN_G(in_code_type) = SUHOSIN_EVAL;
}
if (*suhosin_flags & SUHOSIN_FLAG_NOT_EVALED_CODE) {
goto not_evaled_code;
}
}
if (strstr(op_array->filename, "eval()'d code")) {
SUHOSIN_G(in_code_type) = SUHOSIN_EVAL;
} else {
if (suhosin_flags) {
*suhosin_flags |= SUHOSIN_FLAG_NOT_EVALED_CODE;
}
}
}
not_evaled_code:
SDEBUG("code type %u", SUHOSIN_G(in_code_type));
if (op_array->function_name) {
goto continue_execution;
}
/* if (SUHOSIN_G(deactivate)) {
goto continue_execution;
}
*/
op_array_type = suhosin_detect_codetype(op_array TSRMLS_CC);
switch (op_array_type) {
case SUHOSIN_CODE_TYPE_EVAL:
if (SUHOSIN_G(executor_disable_eval)) {
suhosin_log(S_EXECUTOR|S_GETCALLER, "use of eval is forbidden by configuration");
if (!SUHOSIN_G(simulation)) {
zend_error(E_ERROR, "SUHOSIN - Use of eval is forbidden by configuration");
}
}
break;
case SUHOSIN_CODE_TYPE_REGEXP:
if (SUHOSIN_G(executor_disable_emod)) {
suhosin_log(S_EXECUTOR|S_GETCALLER, "use of preg_replace() with /e modifier is forbidden by configuration");
if (!SUHOSIN_G(simulation)) {
zend_error(E_ERROR, "SUHOSIN - Use of preg_replace() with /e modifier is forbidden by configuration");
}
}
break;
case SUHOSIN_CODE_TYPE_MBREGEXP:
/* XXX TODO: Do we want to disallow this, too? */
break;
case SUHOSIN_CODE_TYPE_ASSERT:
break;
case SUHOSIN_CODE_TYPE_CFUNC:
break;
case SUHOSIN_CODE_TYPE_LONGNAME:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename ('%s') is too long", op_array->filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_MANYDOTS:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename ('%s') contains too many '../'", op_array->filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_UPLOADED:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename is an uploaded file");
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_0FILE:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename contains an ASCIIZ character");
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_WRITABLE:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename ('%s') is writable by PHP process", op_array->filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_BLACKURL:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename ('%s') is an URL that is forbidden by the blacklist", op_array->filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_BADURL:
suhosin_log(S_INCLUDE|S_GETCALLER, "Include filename ('%s') is an URL that is not allowed", op_array->filename);
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_BADFILE:
cs.type = IS_STRING;
#define DIE_WITH_MSG "die('disallowed_file'.chr(10).chr(10));"
cs.value.str.val = estrndup(DIE_WITH_MSG, sizeof(DIE_WITH_MSG)-1);
cs.value.str.len = sizeof(DIE_WITH_MSG)-1;
new_op_array = compile_string(&cs, "suhosin internal code" TSRMLS_CC);
if (new_op_array) {
op_array = new_op_array;
goto continue_execution;
}
suhosin_bailout(TSRMLS_C);
break;
case SUHOSIN_CODE_TYPE_COMMANDLINE:
case SUHOSIN_CODE_TYPE_SUHOSIN:
case SUHOSIN_CODE_TYPE_UNKNOWN:
case SUHOSIN_CODE_TYPE_GOODFILE:
goto continue_execution;
}
continue_execution:
#if PHP_VERSION_ID >= 50500
old_execute_ex (execute_data TSRMLS_CC);
#else
if (zo) {
old_execute_ZO (op_array, dummy TSRMLS_CC);
} else {
old_execute (op_array TSRMLS_CC);
}
#endif
/* nothing to do */
SUHOSIN_G(in_code_type) = orig_code_type;
SUHOSIN_G(execution_depth)--;
}
/* }}} */
#if PHP_VERSION_ID < 50500
/* {{{ void suhosin_execute(zend_op_array *op_array TSRMLS_DC)
* This function provides a hook for execution */
static void suhosin_execute(zend_op_array *op_array TSRMLS_DC)
{
suhosin_execute_ex(op_array, 0, 0 TSRMLS_CC);
}
/* {{{ void suhosin_execute(zend_op_array *op_array, long dummy TSRMLS_DC)
* This function provides a hook for execution */
static void suhosin_execute_ZO(zend_op_array *op_array, long dummy TSRMLS_DC)
{
suhosin_execute_ex(op_array, 1, dummy TSRMLS_CC);
}
/* }}} */
#endif
#if PHP_VERSION_ID >= 50500
#define IH_HANDLER_PARAMS_REST int ht, zval *return_value, zval **return_value_ptr, zval *this_ptr, int return_value_used TSRMLS_DC
#define IH_HANDLER_PARAMS internal_function_handler *ih, IH_HANDLER_PARAMS_REST
#define IH_HANDLER_PARAM_PASSTHRU ih, ht, return_value, return_value_ptr, this_ptr, return_value_used TSRMLS_CC
#else
#define IH_HANDLER_PARAMS_REST zend_execute_data *execute_data_ptr, int return_value_used, int ht, zval *return_value TSRMLS_DC
#define IH_HANDLER_PARAMS internal_function_handler *ih, IH_HANDLER_PARAMS_REST
#define IH_HANDLER_PARAM_PASSTHRU ih, execute_data_ptr, return_value_used, ht, return_value TSRMLS_CC
#endif
HashTable ihandler_table;
typedef struct _internal_function_handler {
char *name;
int (*handler)(struct _internal_function_handler *ih, IH_HANDLER_PARAMS_REST);
void *arg1;
void *arg2;
void *arg3;
} internal_function_handler;
int ih_preg_replace(IH_HANDLER_PARAMS)
{
zval **regex,
**replace,
**subject,
**limit, **zcount;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ZZZ|ZZ", ®ex, &replace, &subject, &limit, &zcount) == FAILURE) {
return(0);
}
if (Z_TYPE_PP(regex) == IS_ARRAY) {
zval **regex_entry;
zend_hash_internal_pointer_reset(Z_ARRVAL_PP(regex));
/* For each entry in the regex array, get the entry */
while (zend_hash_get_current_data(Z_ARRVAL_PP(regex), (void **)®ex_entry) == SUCCESS) {
if (Z_TYPE_PP(regex_entry) == IS_STRING) {
if (strlen(Z_STRVAL_PP(regex_entry)) != Z_STRLEN_PP(regex_entry)) {
suhosin_log(S_EXECUTOR, "string termination attack on first preg_replace parameter detected");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
}
zend_hash_move_forward(Z_ARRVAL_PP(regex));
}
} else if (Z_TYPE_PP(regex) == IS_STRING) {
if (strlen(Z_STRVAL_PP(regex)) != Z_STRLEN_PP(regex)) {
suhosin_log(S_EXECUTOR, "string termination attack on first preg_replace parameter detected");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
}
return (0);
}
int ih_symlink(IH_HANDLER_PARAMS)
{
if (SUHOSIN_G(executor_allow_symlink)) {
return (0);
}
if (PG(open_basedir) && PG(open_basedir)[0]) {
suhosin_log(S_EXECUTOR, "symlink called during open_basedir");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
return (0);
}
int ih_mail(IH_HANDLER_PARAMS)
{
char *to=NULL, *message=NULL, *headers=NULL;
char *subject=NULL, *extra_cmd=NULL;
char *tmp;
int to_len, message_len, headers_len;
int subject_len, extra_cmd_len;
if (SUHOSIN_G(mailprotect) == 0) {
return (0);
}
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sss|ss",
&to, &to_len,
&subject, &subject_len,
&message, &message_len,
&headers, &headers_len,
&extra_cmd, &extra_cmd_len
) == FAILURE) {
RETVAL_FALSE;
return (1);
}
if (headers_len > 0 && headers && (strstr(headers,"\n\n") || strstr(headers,"\r\n\r\n")) ) {
suhosin_log(S_MAIL, "mail() - double newline in headers, possible injection, mail dropped");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
/* check for spam attempts with buggy webforms */
if (to_len > 0 && to) {
do {
tmp = strchr(to, '\n');
tmp = tmp == NULL ? strchr(to, '\r') : tmp;
if (tmp == NULL) break;
to = tmp+1;
if (isspace(*to)) continue;
} while (1);
if (tmp != NULL) {
suhosin_log(S_MAIL, "mail() - newline in to header, possible injection, mail dropped");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
}
if (subject_len > 0 && subject) {
do {
tmp = strchr(subject, '\n');
tmp = tmp == NULL ? strchr(subject, '\r') : tmp;
if (tmp == NULL) break;
subject = tmp+1;
if (isspace(*subject)) continue;
} while (1);
if (tmp != NULL) {
suhosin_log(S_MAIL, "mail() - newline in subject header, possible injection, mail dropped");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
}
if (SUHOSIN_G(mailprotect) > 1) {
/* search for to, cc or bcc headers */
if (headers_len > 0 && headers != NULL) {
if (strncasecmp(headers, "to:", sizeof("to:") - 1) == 0 || suhosin_strcasestr(headers, "\nto:")) {
suhosin_log(S_MAIL, "mail() - To: headers aren't allowed in the headers parameter.");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
if (strncasecmp(headers, "cc:", sizeof("cc:") - 1) == 0 || suhosin_strcasestr(headers, "\ncc:")) {
suhosin_log(S_MAIL, "mail() - CC: headers aren't allowed in the headers parameter.");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
if (strncasecmp(headers, "bcc:", sizeof("bcc:") - 1) == 0 || suhosin_strcasestr(headers, "\nbcc:")) {
suhosin_log(S_MAIL, "mail() - BCC: headers aren't allowed in the headers parameter.");
if (!SUHOSIN_G(simulation)) {
RETVAL_FALSE;
return (1);
}
}
}
}
return (0);
}
#define SQLSTATE_SQL 0
#define SQLSTATE_IDENTIFIER 1
#define SQLSTATE_STRING 2
#define SQLSTATE_COMMENT 3
#define SQLSTATE_MLCOMMENT 4
int ih_querycheck(IH_HANDLER_PARAMS)
{
#ifdef PHP_ATLEAST_5_3
void **p = zend_vm_stack_top(TSRMLS_C) - 1;
#else
void **p = EG(argument_stack).top_element-2;
#endif
unsigned long arg_count;
zval **arg;
char *query, *s, *e;
zval *backup;
int len;
char quote;
int state = SQLSTATE_SQL;
int cnt_union = 0, cnt_select = 0, cnt_comment = 0, cnt_opencomment = 0;
int mysql_extension = 0;
SDEBUG("function: %s", ih->name);
arg_count = (unsigned long) *p;
if (ht < (long) ih->arg1) {
return (0);
}
if ((long) ih->arg2) {
mysql_extension = 1;
}
arg = (zval **) p - (arg_count - (long) ih->arg1 + 1); /* count from 0 */
backup = *arg;
if (Z_TYPE_P(backup) != IS_STRING) {
return (0);
}
len = Z_STRLEN_P(backup);
query = Z_STRVAL_P(backup);
SDEBUG("SQL |%s|", query);
s = query;
e = s+len;
while (s < e) {
switch (state)
{
case SQLSTATE_SQL:
switch (s[0])
{
case '`':
state = SQLSTATE_IDENTIFIER;
quote = '`';
break;
case '\'':
case '"':
state = SQLSTATE_STRING;
quote = *s;
break;
case '/':
if (s[1]=='*') {
if (mysql_extension == 1 && s[2] == '!') {
s += 2;
break;
}
s++;
state = SQLSTATE_MLCOMMENT;
cnt_comment++;
}
break;
case '-':
if (s[1]=='-') {
s++;
state = SQLSTATE_COMMENT;
cnt_comment++;
}
break;
case '#':
state = SQLSTATE_COMMENT;
cnt_comment++;
break;
case 'u':
case 'U':
if (strncasecmp("union", s, 5)==0) {
s += 4;
cnt_union++;
}
break;
case 's':
case 'S':
if (strncasecmp("select", s, 6)==0) {
s += 5;
cnt_select++;
}
break;
}
break;
case SQLSTATE_STRING:
case SQLSTATE_IDENTIFIER:
if (s[0] == quote) {
if (s[1] == quote) {
s++;
} else {
state = SQLSTATE_SQL;
}
}
if (s[0] == '\\') {
s++;
}
break;
case SQLSTATE_COMMENT:
while (s[0] && s[0] != '\n') {
s++;
}
state = SQLSTATE_SQL;
break;
case SQLSTATE_MLCOMMENT:
while (s[0] && (s[0] != '*' || s[1] != '/')) {
s++;
}
if (s[0]) {
state = SQLSTATE_SQL;
}
break;
}
s++;
}
if (state == SQLSTATE_MLCOMMENT) {
cnt_opencomment = 1;
}
if (cnt_opencomment && SUHOSIN_G(sql_opencomment)>0) {
suhosin_log(S_SQL, "Open comment in SQL query: '%*s'", len, query);
if (SUHOSIN_G(sql_opencomment)>1) {
suhosin_bailout(TSRMLS_C);
}
}
if (cnt_comment && SUHOSIN_G(sql_comment)>0) {
suhosin_log(S_SQL, "Comment in SQL query: '%*s'", len, query);
if (SUHOSIN_G(sql_comment)>1) {
suhosin_bailout(TSRMLS_C);
}