用Ibatis中Like中SQL注入,被批

在项目中,运用Ibatis中Like写法,没有研究下,结果SQL语句存在SQL注入漏洞,整理下,下次谨记啊!

sql语句:

select *
        from (select 1 from poll
        <dynamic prepend=" where ">
            <isNotEmpty prepend=" and " property="title">
                title like '%$title$%'
            </isNotEmpty>
            <isNotEmpty property="used">
                <isEqual compareValue="true" prepend=" and " property="used">
                    <![CDATA[status & 2 > 0 and status & 1 <= 0 and status & 8 <= 0 ]]>
                </isEqual>
            </isNotEmpty>
            <isNotEmpty prepend=" and " property="startTimeBegin">
                <![CDATA[ gmt_create >= #startTimeBegin# ]]>
            </isNotEmpty>
            <isNotEmpty prepend=" and " property="startTimeEnd">
                <![CDATA[ gmt_create <= #startTimeEnd# ]]>
            </isNotEmpty>
        </dynamic>
        limit 10000
        ) as t

 请关注此写法的:

title like '%$title$%'

存在SQL注入漏洞。

下面是一段单元测试:

PollQuery query = new PollQuery();
query.setCurrentPage(1);
query.setPageSize(50);
query.setTitle("1231%' or '1%' = '1");//很简单的写法:(
List<SnsPollDO> l = pollDAO.findPollList(query);
System.out.println(l.size())

 测试结果(打印处的sql语句):

1. select * from poll   where    title like '%1231%' or '1%' = '1%'

尽管 title 没匹配对,但是or后面那句是恒等的。哎!

看来下面的写法只是简单的转义下:

title like '%$title$%'

如何解决:

在oracle下面改成:title like '%'||#title#||'%',这样肯定是可以的。

但是在mysql中,上述写法是不行,还是有上面的问题的:

select  * from poll where  title like '%'||?||'%'  order by gmt_create desc   limit ?, ?

 还能查出结果来!哎!

得用:title CONCAT('%',#title#,'%')

select * from poll  where  title like CONCAT('%',?,'%')  order by gmt_create desc limit ?, ?

呵呵,多次测试均没有发现问题!

你可能感兴趣的:(oracle,sql,mysql,ibatis,单元测试)