/* {{{ PHP_INI_MH
*/
static PHP_INI_MH(suhosin_OnChangeMemoryLimit)
{
#if SIZEOF_LONG==8
long hard_memory_limit = 0x7fffffffffffffff;
#elif SIZEOF_LONG==4
long hard_memory_limit = 0x7fffffff;
#endif /* will produce a compile error or SIZEOF_LONG is not 4 or 8 */
if (stage == ZEND_INI_STAGE_RUNTIME) {
if (SUHOSIN_G(memory_limit) > 0) {
SUHOSIN_G(hard_memory_limit) = SUHOSIN_G(memory_limit);
} else if (SUHOSIN_G(hard_memory_limit) == 0) {
SUHOSIN_G(hard_memory_limit) = PG(memory_limit);
}
hard_memory_limit = SUHOSIN_G(hard_memory_limit);
} else {
SUHOSIN_G(hard_memory_limit) = 0;
}
if (new_value) {
PG(memory_limit) = zend_atol(new_value, new_value_length);
if (hard_memory_limit > 0) {
if (PG(memory_limit) > hard_memory_limit) {
suhosin_log(S_MISC, "script tried to increase memory_limit to %lu bytes which is above the allowed value", PG(memory_limit));
if (!SUHOSIN_G(simulation)) {
PG(memory_limit) = hard_memory_limit;
return FAILURE;
}
} else if (PG(memory_limit) < 0) {
suhosin_log(S_MISC, "script tried to disable memory_limit by setting it to a negative value %ld bytes which is not allowed", PG(memory_limit));
if (!SUHOSIN_G(simulation)) {
PG(memory_limit) = hard_memory_limit;
return FAILURE;
}
}
}
} else {
PG(memory_limit) = hard_memory_limit;
}
return zend_set_memory_limit(PG(memory_limit));
}
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
}
/* {{{ SAPI_UPLOAD_VARNAME_FILTER_FUNC
*/
static int check_fileupload_varname(char *varname)
{
char *index, *prev_index = NULL, *var;
unsigned int var_len, total_len, depth = 0;
TSRMLS_FETCH();
var = estrdup(varname);
/* Normalize the variable name */
normalize_varname(var);
/* Find length of variable name */
index = strchr(var, '[');
total_len = strlen(var);
var_len = index ? index-var : total_len;
/* Drop this variable if it exceeds the varname/total length limit */
if (SUHOSIN_G(max_varname_length) && SUHOSIN_G(max_varname_length) < var_len) {
suhosin_log(S_FILES, "configured request variable name length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
if (SUHOSIN_G(max_totalname_length) && SUHOSIN_G(max_totalname_length) < total_len) {
suhosin_log(S_FILES, "configured request variable total name length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
if (SUHOSIN_G(max_post_name_length) && SUHOSIN_G(max_post_name_length) < var_len) {
suhosin_log(S_FILES, "configured POST variable name length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
if (SUHOSIN_G(max_post_totalname_length) && SUHOSIN_G(max_post_totalname_length) < var_len) {
suhosin_log(S_FILES, "configured POST variable total name length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
/* Find out array depth */
while (index) {
char *index_end;
unsigned int index_length;
/* overjump '[' */
index++;
/* increase array depth */
depth++;
index_end = strchr(index, ']');
if (index_end == NULL) {
index_end = index+strlen(index);
}
index_length = index_end - index;
if (SUHOSIN_G(max_array_index_length) && SUHOSIN_G(max_array_index_length) < index_length) {
suhosin_log(S_FILES, "configured request variable array index length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
if (SUHOSIN_G(max_post_array_index_length) && SUHOSIN_G(max_post_array_index_length) < index_length) {
suhosin_log(S_FILES, "configured POST variable array index length limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
index = strchr(index, '[');
}
/* Drop this variable if it exceeds the array depth limit */
if (SUHOSIN_G(max_array_depth) && SUHOSIN_G(max_array_depth) < depth) {
suhosin_log(S_FILES, "configured request variable array depth limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
if (SUHOSIN_G(max_post_array_depth) && SUHOSIN_G(max_post_array_depth) < depth) {
suhosin_log(S_FILES, "configured POST variable array depth limit exceeded - dropped variable '%s'", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
/* Drop this variable if it is one of GLOBALS, _GET, _POST, ... */
/* This is to protect several silly scripts that do globalizing themself */
if (is_protected_varname(var, var_len)) {
suhosin_log(S_FILES, "tried to register forbidden variable '%s' through FILE variables", var);
if (!SUHOSIN_G(simulation)) {
goto return_failure;
}
}
efree(var);
return SUCCESS;
return_failure:
efree(var);
return FAILURE;
}
/* parse headers */
static int multipart_buffer_headers(multipart_buffer *self, zend_llist *header)
{
char *line;
mime_header_entry entry = {0};
smart_string buf_value = {0};
char *key = NULL;
size_t newlines = 0;
/* didn't find boundary, abort */
if (!find_boundary(self, self->boundary)) {
return 0;
}
/* get lines of text, or CRLF_CRLF */
while ((line = get_line(self)) && line[0] != '\0') {
/* add header to table */
char *value = NULL;
if (php_rfc1867_encoding_translation()) {
self->input_encoding = zend_multibyte_encoding_detector((const unsigned char *) line, strlen(line), self->detect_order, self->detect_order_size);
}
/* space in the beginning means same header */
if (!isspace(line[0])) {
value = strchr(line, ':');
}
if (value) {
if (buf_value.c && key) {
/* new entry, add the old one to the list */
smart_string_0(&buf_value);
entry.key = key;
entry.value = buf_value.c;
zend_llist_add_element(header, &entry);
buf_value.c = NULL;
key = NULL;
}
*value = '\0';
do { value++; } while (isspace(*value));
key = estrdup(line);
smart_string_appends(&buf_value, value);
newlines = 0;
} else if (buf_value.c) { /* If no ':' on the line, add to previous line */
newlines++;
if (newlines > SUHOSIN7_G(upload_max_newlines)) {
SUHOSIN7_G(abort_request) = 1;
suhosin_log(S_FILES, "configured maximum number of newlines in RFC1867 MIME headers limit exceeded - dropping rest of upload");
return 0;
}
smart_string_appends(&buf_value, line);
} else {
continue;
}
}
if (buf_value.c && key) {
/* add the last one to the list */
smart_string_0(&buf_value);
entry.key = key;
entry.value = buf_value.c;
zend_llist_add_element(header, &entry);
}
return 1;
}
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];
char error[5000];
char *ip_address;
char *fname;
char *alertstring;
int lineno;
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: %u - log_sapi: %u - log_script: %u", 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);
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) {
lineno = exdata->prev_execute_data->opline->lineno;
fname = (char *)exdata->prev_execute_data->op_array->filename;
} else {
lineno = exdata->opline->lineno;
fname = (char *)exdata->op_array->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;
}
gettimeofday(&tv, NULL);
now = tv.tv_sec;
php_gmtime_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);
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: %u - log_sapi: %u - log_script: %u - log_phpscript: %u", 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) {
#if PHP_VERSION_ID < 50400
sapi_module.log_message(buf);
#else
sapi_module.log_message(buf TSRMLS_CC);
#endif
}
if ((SUHOSIN_G(log_stdout) & loglevel)!=0) {
printf("%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);
#if PHP_VERSION_ID < 50400
zend_bool orig_safe_mode = PG(safe_mode);
#endif
char *orig_basedir = PG(open_basedir);
char *phpscript = SUHOSIN_G(log_phpscriptname);
SDEBUG("scriptname %s", SUHOSIN_G(log_phpscriptname));
#ifdef ZEND_ENGINE_2
if (zend_stream_open(phpscript, &file_handle TSRMLS_CC) == SUCCESS) {
#else
if (zend_open(phpscript, &file_handle) == SUCCESS && ZEND_IS_VALID_FILE_HANDLE(&file_handle)) {
file_handle.filename = phpscript;
file_handle.free_filename = 0;
#endif
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)) {
#if PHP_VERSION_ID < 50400
PG(safe_mode) = 0;
#endif
PG(open_basedir) = NULL;
}
zend_execute(new_op_array TSRMLS_CC);
SUHOSIN_G(execution_depth) = orig_execution_depth;
#if PHP_VERSION_ID < 50400
PG(safe_mode) = orig_safe_mode;
#endif
PG(open_basedir) = orig_basedir;
#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 {
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;
}
}
}
