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25 lines
1.2 KiB
Markdown
25 lines
1.2 KiB
Markdown
# Web Cache Deception Attack
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## Exploit
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```
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1.Browser requests http://www.example.com/home.php/non-existent.css.
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2.Server returns the content of http://www.example.com/home.php, most probably with HTTP caching headers that instruct to not cache this page.
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3.The response goes through the proxy.
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4.The proxy identifies that the file has a css extension.
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5.Under the cache directory, the proxy creates a directory named home.php, and caches the imposter "CSS" file (non-existent.css) inside.
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```
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## Methodology of the attack - example
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```
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1. Normal browsing, visit home : https://www.example.com/myaccount/home/
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2. Open the malicious link : https://www.example.com/myaccount/home/malicious.css
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3. The page is displayed as /home and the cache is saving the page
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4. Open a private tab with the previous URL : https://www.paypal.com/myaccount/home/malicous.css
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5. The content of the cache is displayed
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```
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[](https://www.youtube.com/watch?v=pLte7SomUB8)
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Video of the attack by Omer Gil - Web Cache Deception Attack in PayPal Home Page
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## Thanks to
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* http://omergil.blogspot.fr/2017/02/web-cache-deception-attack.html |