$Model->where("id=%d and username='%s' and xx='%f'",array($id,$username,$xx))->select();

$Model->where("id=%d and username='%s' and xx='%f'",$id,$username,$xx)->select();

$model->query('select * from user where id=%d and status=%s',$id,$status);

$model->query('select * from user where id=%d and status=%s',array($id,$status));

protected function parseSql($sql,$parse) {
// 分析表达式
if(true === $parse) {
  $options = $this->_parseOptions();
  $sql =  $this->db->parseSql($sql,$options);
}elseif(is_array($parse)){ // SQL预处理
  $sql = vsprintf($sql,$parse);
}else{
  $sql  =  strtr($sql,array('__TABLE__'=>$this->getTableName(),'__PREFIX__'=>C('DB_PREFIX')));
}
$this->db->setModel($this->name);
return $sql;
}

http://localhost/Main" or 1="1

http://localhost/Main"htmlcode">

$model=M('Peipeidui');
$m=$model->query('select * from peipeidui where name="%s"',$_GET['id']);
dump($m);exit;



或者：




$model=M('Peipeidui');
$m=$model->query('select * from peipeidui where name="%s"',array($_GET['id']));
dump($m);exit;



结果:



表peipeidui所有数据被列出,SQL注入语句起效.

 

解决方法:
可将parseSql函数修改为: 




protected function parseSql($sql,$parse) {
// 分析表达式
if(true === $parse) {
  $options = $this->_parseOptions();
  $sql =  $this->db->parseSql($sql,$options);
}elseif(is_array($parse)){ // SQL预处理
  $parse = array_map(array($this->db,'escapeString'),$parse);//此行为新增代码
  $sql = vsprintf($sql,$parse);
}else{
  $sql  =  strtr($sql,array('__TABLE__'=>$this->getTableName(),'__PREFIX__'=>C('DB_PREFIX')));
}
$this->db->setModel($this->name);
return $sql;
}



总结:

1.不要过分依赖TP的底层SQL过滤,程序员要做好安全检查

2.不建议直接用$_GET,$_POST