dmitry Wed, 14 Dec 2011 08:56:35 +0000
Revision: http://svn.php.net/viewvc?view=revision&revision=321003
Log:
Added max_input_vars directive to prevent attacks based on hash collisions
Changed paths:
U php/php-src/branches/PHP_5_4/NEWS
U php/php-src/branches/PHP_5_4/main/main.c
U php/php-src/branches/PHP_5_4/main/php_globals.h
U php/php-src/branches/PHP_5_4/main/php_variables.c
U php/php-src/trunk/main/main.c
U php/php-src/trunk/main/php_globals.h
U php/php-src/trunk/main/php_variables.c
Modified: php/php-src/branches/PHP_5_4/NEWS
===================================================================
--- php/php-src/branches/PHP_5_4/NEWS 2011-12-14 04:02:56 UTC (rev 321002)
+++ php/php-src/branches/PHP_5_4/NEWS 2011-12-14 08:56:35 UTC (rev 321003)
@@ -1,6 +1,9 @@
PHP NEWS
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
?? Dec 2011, PHP 5.4.0 RC4
+- Core:
+ . Added max_input_vars directive to prevent attacks based on hash collisions
+ (Dmitry).
- CLI SAPI:
. Fixed bug #60477 (Segfault after two multipart/form-data POST requests,
one 200 RQ and one 404). (Laruence)
@@ -9,6 +12,8 @@
08 Dec 2011, PHP 5.4.0 RC3
- Core:
+ . Fixed bug #60444 (Segmentation fault with include & class extending).
+ (Laruence, Dmitry).
. Fixed bug #60350 (No string escape code for ESC (ascii 27), normally \e).
(php at mickweiss dot com)
. Fixed bug #60240 (invalid read/writes when unserializing specially crafted
Modified: php/php-src/branches/PHP_5_4/main/main.c
===================================================================
--- php/php-src/branches/PHP_5_4/main/main.c 2011-12-14 04:02:56 UTC (rev
321002)
+++ php/php-src/branches/PHP_5_4/main/main.c 2011-12-14 08:56:35 UTC (rev
321003)
@@ -531,6 +531,7 @@
STD_PHP_INI_ENTRY("post_max_size", "8M",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLong,
post_max_size, sapi_globals_struct,sapi_globals)
STD_PHP_INI_ENTRY("upload_tmp_dir", NULL,
PHP_INI_SYSTEM, OnUpdateStringUnempty, upload_tmp_dir,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("max_input_nesting_level", "64",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLongGEZero,
max_input_nesting_level, php_core_globals,
core_globals)
+ STD_PHP_INI_ENTRY("max_input_vars", "1000",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLongGEZero, max_input_vars,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("user_dir", NULL,
PHP_INI_SYSTEM, OnUpdateString, user_dir,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("variables_order", "EGPCS",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateStringUnempty,
variables_order, php_core_globals, core_globals)
Modified: php/php-src/branches/PHP_5_4/main/php_globals.h
===================================================================
--- php/php-src/branches/PHP_5_4/main/php_globals.h 2011-12-14 04:02:56 UTC
(rev 321002)
+++ php/php-src/branches/PHP_5_4/main/php_globals.h 2011-12-14 08:56:35 UTC
(rev 321003)
@@ -146,6 +146,7 @@
zend_bool com_initialized;
#endif
long max_input_nesting_level;
+ long max_input_vars;
zend_bool in_user_include;
char *user_ini_filename;
Modified: php/php-src/branches/PHP_5_4/main/php_variables.c
===================================================================
--- php/php-src/branches/PHP_5_4/main/php_variables.c 2011-12-14 04:02:56 UTC
(rev 321002)
+++ php/php-src/branches/PHP_5_4/main/php_variables.c 2011-12-14 08:56:35 UTC
(rev 321003)
@@ -179,6 +179,9 @@
escaped_index = index;
if (zend_symtable_find(symtable1,
escaped_index, index_len + 1, (void **) &gpc_element_p) == FAILURE
|| Z_TYPE_PP(gpc_element_p) !=
IS_ARRAY) {
+ if (zend_hash_num_elements(symtable1)
>= PG(max_input_vars)) {
+ php_error_docref(NULL
TSRMLS_CC, E_ERROR, "Input variables exceeded %ld. To increase the limit change
max_input_vars in php.ini.", PG(max_input_vars));
+ }
MAKE_STD_ZVAL(gpc_element);
array_init(gpc_element);
zend_symtable_update(symtable1,
escaped_index, index_len + 1, &gpc_element, sizeof(zval *), (void **)
&gpc_element_p);
@@ -220,6 +223,9 @@
zend_symtable_exists(symtable1, escaped_index,
index_len + 1)) {
zval_ptr_dtor(&gpc_element);
} else {
+ if (zend_hash_num_elements(symtable1) >=
PG(max_input_vars)) {
+ php_error_docref(NULL TSRMLS_CC,
E_ERROR, "Input variables exceeded %ld. To increase the limit change
max_input_vars in php.ini.", PG(max_input_vars));
+ }
zend_symtable_update(symtable1, escaped_index,
index_len + 1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
}
if (escaped_index != index) {
Modified: php/php-src/trunk/main/main.c
===================================================================
--- php/php-src/trunk/main/main.c 2011-12-14 04:02:56 UTC (rev 321002)
+++ php/php-src/trunk/main/main.c 2011-12-14 08:56:35 UTC (rev 321003)
@@ -531,6 +531,7 @@
STD_PHP_INI_ENTRY("post_max_size", "8M",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLong,
post_max_size, sapi_globals_struct,sapi_globals)
STD_PHP_INI_ENTRY("upload_tmp_dir", NULL,
PHP_INI_SYSTEM, OnUpdateStringUnempty, upload_tmp_dir,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("max_input_nesting_level", "64",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLongGEZero,
max_input_nesting_level, php_core_globals,
core_globals)
+ STD_PHP_INI_ENTRY("max_input_vars", "1000",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateLongGEZero, max_input_vars,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("user_dir", NULL,
PHP_INI_SYSTEM, OnUpdateString, user_dir,
php_core_globals, core_globals)
STD_PHP_INI_ENTRY("variables_order", "EGPCS",
PHP_INI_SYSTEM|PHP_INI_PERDIR, OnUpdateStringUnempty,
variables_order, php_core_globals, core_globals)
Modified: php/php-src/trunk/main/php_globals.h
===================================================================
--- php/php-src/trunk/main/php_globals.h 2011-12-14 04:02:56 UTC (rev
321002)
+++ php/php-src/trunk/main/php_globals.h 2011-12-14 08:56:35 UTC (rev
321003)
@@ -146,6 +146,7 @@
zend_bool com_initialized;
#endif
long max_input_nesting_level;
+ long max_input_vars;
zend_bool in_user_include;
char *user_ini_filename;
Modified: php/php-src/trunk/main/php_variables.c
===================================================================
--- php/php-src/trunk/main/php_variables.c 2011-12-14 04:02:56 UTC (rev
321002)
+++ php/php-src/trunk/main/php_variables.c 2011-12-14 08:56:35 UTC (rev
321003)
@@ -179,6 +179,9 @@
escaped_index = index;
if (zend_symtable_find(symtable1,
escaped_index, index_len + 1, (void **) &gpc_element_p) == FAILURE
|| Z_TYPE_PP(gpc_element_p) !=
IS_ARRAY) {
+ if (zend_hash_num_elements(symtable1)
>= PG(max_input_vars)) {
+ php_error_docref(NULL
TSRMLS_CC, E_ERROR, "Input variables exceeded %ld. To increase the limit change
max_input_vars in php.ini.", PG(max_input_vars));
+ }
MAKE_STD_ZVAL(gpc_element);
array_init(gpc_element);
zend_symtable_update(symtable1,
escaped_index, index_len + 1, &gpc_element, sizeof(zval *), (void **)
&gpc_element_p);
@@ -220,6 +223,9 @@
zend_symtable_exists(symtable1, escaped_index,
index_len + 1)) {
zval_ptr_dtor(&gpc_element);
} else {
+ if (zend_hash_num_elements(symtable1) >=
PG(max_input_vars)) {
+ php_error_docref(NULL TSRMLS_CC,
E_ERROR, "Input variables exceeded %ld. To increase the limit change
max_input_vars in php.ini.", PG(max_input_vars));
+ }
zend_symtable_update(symtable1, escaped_index,
index_len + 1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
}
if (escaped_index != index) {
--
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