Fix bug #66550 (SQLite prepared statement use-after-free)

Author: smalyshev

NEWS

@@ -9,6 +9,9 @@ PHP                                                                        NEWS
   . Fixed bug #69152 (Type Confusion Infoleak Vulnerability in unserialize()
     with SoapFault). (Dmitry)
 
+- Sqlite3:
+  . Fixed bug #66550 (SQLite prepared statement use-after-free). (Sean Heelan)
+
 - Postgres:
   . Fixed bug #68741 (Null pointer deference) (CVE-2015-1352). (Xinchen Hui)
 

ext/sqlite3/sqlite3.c

@@ -1274,6 +1274,8 @@ PHP_METHOD(sqlite3stmt, paramCount)
 	php_sqlite3_stmt *stmt_obj;
 	zval *object = getThis();
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -1290,6 +1292,8 @@ PHP_METHOD(sqlite3stmt, close)
 	php_sqlite3_stmt *stmt_obj;
 	zval *object = getThis();
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -1308,6 +1312,8 @@ PHP_METHOD(sqlite3stmt, reset)
 	php_sqlite3_stmt *stmt_obj;
 	zval *object = getThis();
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -1328,6 +1334,8 @@ PHP_METHOD(sqlite3stmt, clear)
 	php_sqlite3_stmt *stmt_obj;
 	zval *object = getThis();
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -1349,6 +1357,8 @@ PHP_METHOD(sqlite3stmt, readOnly)
 	php_sqlite3_stmt *stmt_obj;
 	zval *object = getThis();
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -1416,6 +1426,8 @@ PHP_METHOD(sqlite3stmt, bindParam)
 	zval *object = getThis();
 	struct php_sqlite3_bound_param param = {0};
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	param.param_number = -1;
 	param.type = SQLITE3_TEXT;
@@ -1447,6 +1459,8 @@ PHP_METHOD(sqlite3stmt, bindValue)
 	zval *object = getThis();
 	struct php_sqlite3_bound_param param = {0};
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
+	
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
 
 	param.param_number = -1;
 	param.type = SQLITE3_TEXT;
@@ -1482,6 +1496,8 @@ PHP_METHOD(sqlite3stmt, execute)
 
 	stmt_obj = (php_sqlite3_stmt *)zend_object_store_get_object(object TSRMLS_CC);
 
+	SQLITE3_CHECK_INITIALIZED(stmt_obj->db_obj, stmt_obj->initialised, SQLite3)
+
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
 	}

ext/sqlite3/tests/bug66550.phpt

@@ -0,0 +1,23 @@
+--TEST--
+Bug #66550 (SQLite prepared statement use-after-free)
+--SKIPIF--
+<?php
+if (!extension_loaded('sqlite3')) die('skip');
+?>
+--FILE--
+<?php
+
+$db = new SQLite3(':memory:');
+
+$db->exec('CREATE TABLE foo (id INTEGER, bar STRING)');
+
+$stmt = $db->prepare('SELECT bar FROM foo WHERE id=:id');
+// Close the database connection and free the internal sqlite3_stmt object
+$db->close();
+// Access the sqlite3_stmt object via the php_sqlite3_stmt container
+$stmt->reset();
+?>
+==DONE==
+--EXPECTF--
+Warning: SQLite3Stmt::reset(): The SQLite3 object has not been correctly initialised in %s
+==DONE==