mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-15 09:27:32 +00:00
74 lines
6.4 KiB
Markdown
74 lines
6.4 KiB
Markdown
# Chrome Cache to XSS
|
|
|
|
<details>
|
|
|
|
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
|
|
|
* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
|
|
|
|
</details>
|
|
|
|
Technique taken [**from this writeup**](https://blog.arkark.dev/2022/11/18/seccon-en/#web-spanote)**.**
|
|
|
|
There are two important types of cache:
|
|
|
|
* **back/forward cache (bfcache)**
|
|
* ref. [https://web.dev/i18n/en/bfcache/](https://web.dev/i18n/en/bfcache/)
|
|
* It stores a complete snapshot of a page **including the JavaScript heap**.
|
|
* The cache is used for back/forward navigations.
|
|
* it has preference over disk cache
|
|
* **disk cache**
|
|
* ref. [https://www.chromium.org/developers/design-documents/network-stack/disk-cache/](https://www.chromium.org/developers/design-documents/network-stack/disk-cache/)
|
|
* It stores a resource fetched from the web. The cache **doesn't include the JavaScript heap**.
|
|
* The cache is also used for back/forward navigations to skip communication costs.
|
|
|
|
As a interesting point of disk cache, the **cache includes** not only the HTTP response rendered to a web page, but also **those fetched with `fetch`**. In other words, if you a**ccess the URL for a fetched** resource, the **browser will render the resource** on the page.
|
|
|
|
There is another important point. If both disk cache and bfcache are valid for an accessed page at back/forward navigations, the **bfcache has priority over the disk cache**. So, if you need to access a page stored in both caches but you want to use the one from the disk, you need to somehow **disable bfcache.**
|
|
|
|
### Disable bfcache
|
|
|
|
bfcache is disabled by [default options](https://github.com/puppeteer/puppeteer/blob/v19.2.0/packages/puppeteer-core/src/node/ChromeLauncher.ts#L175) of puppeteer.
|
|
|
|
Let's try the interesting behavior in this challenge.
|
|
|
|
Firstly, you have to disable bfcache[\[2\]](https://blog.arkark.dev/2022/11/18/seccon-en/#fn2). There are many conditions where bfcache is disabled, the list is:
|
|
|
|
* [https://source.chromium.org/chromium/chromium/src/+/main:out/mac-Debug/gen/third\_party/blink/renderer/core/inspector/protocol/page.cc?q=BackForwardCacheNotRestoredReasonEnum \&ss=chromium](https://source.chromium.org/chromium/chromium/src/+/main:out/mac-Debug/gen/third\_party/blink/renderer/core/inspector/protocol/page.cc?q=BackForwardCacheNotRestoredReasonEnum%20\&ss=chromium)
|
|
|
|
The easy way is to use `RelatedActiveContentsExist`.
|
|
|
|
* `RelatedActiveContentsExist`: The page opend with `window.open()` and it has a reference of `window.opener`.
|
|
* ref. [https://web.dev/i18n/en/bfcache/#avoid-windowopener-references](https://web.dev/i18n/en/bfcache/#avoid-windowopener-references)
|
|
|
|
Therefore, the following procedure reproduces the behavior:
|
|
|
|
1. Access a web page (E.g. `https://example.com`)
|
|
2. Execute `open("http://spanote.seccon.games:3000/api/token")`
|
|
* 
|
|
* The server returns a response with 500 status code.
|
|
3. In the opend tab, access `http://spanote.seccon.games:3000/`
|
|
* 
|
|
* Then, the response of `http://spanote.seccon.games:3000/api/token` is cached as a disk cache.
|
|
4. Execute `history.back()`
|
|
* 
|
|
* The cached JSON response is rendered on the page!
|
|
|
|
You can confirm that disk cache is used using DevTools in Google Chrome:\
|
|
|
|
|
|
<details>
|
|
|
|
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
|
|
|
* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
|
|
|
|
</details>
|