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2025-04-04 Add Detecting Web Cache Deception Content #774

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2025-04-04 Add Detecting Web Cache Deception Content #774

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13 changes: 13 additions & 0 deletions Web Cache Deception/README.md
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Expand Up @@ -90,6 +90,19 @@ The following URL format are a good starting point to check for "cache" feature.
* `https://example.com/app/conversation/;.js`
* `https://example.com/home.php/non-existent.css`

## Detecting Web Cache Deception

1. Detecting delimiter discrepancies: `/path/<dynamic-resource>;<static-resource>`
* For example: `/settings/profile;script.js`
* If the origin server uses `;` as a delimiter but the cache isn't
* The cache interprets the path as: `/settings/profile;script.js`
* The origin server interprets the path as: `/settings/profile`
* For more delimiter characters: see [Web cache deception lab delimiter list](https://portswigger.net/web-security/web-cache-deception/wcd-lab-delimiter-list)
2. Detecting normalization: `/wcd/..%2fprofile`
* If the origin server resolved the path traversal sequence but the cache isn't
* The cache interprets the path as: `/wcd/..%2fprofile`
* The origin server interprets the path as: `/profile`

## CloudFlare Caching

CloudFlare caches the resource when the `Cache-Control` header is set to `public` and `max-age` is greater than 0.
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