mirror of
https://github.com/carlospolop/hacktricks
synced 2024-12-18 17:16:10 +00:00
66 lines
3.9 KiB
Markdown
66 lines
3.9 KiB
Markdown
|
# HTTP Connection Request Smuggling
|
||
|
|
|
||
|
|
{% hint style="success" %}
|
||
|
|
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
|
||
|
|
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
||
|
|
|
||
|
|
<details>
|
||
|
|
|
||
|
|
<summary>Support HackTricks</summary>
|
||
|
|
|
||
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
||
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
||
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
||
|
|
|
||
|
|
</details>
|
||
|
|
{% endhint %}
|
||
|
|
|
||
|
|
**This is a summary of the post** [**https://portswigger.net/research/browser-powered-desync-attacks**](https://portswigger.net/research/browser-powered-desync-attacks)
|
||
|
|
|
||
|
|
## Connection State Attacks <a href="#state" id="state"></a>
|
||
|
|
|
||
|
|
### First-request Validation
|
||
|
|
|
||
|
|
When routing requests, reverse proxies might depend on the **Host header** to determine the destination back-end server, often relying on a whitelist of hosts that are permitted access. However, a vulnerability exists in some proxies where the whitelist is only enforced on the initial request in a connection. Consequently, attackers could exploit this by first making a request to an allowed host and then requesting an internal site through the same connection:
|
||
|
|
|
||
|
|
```
|
||
|
|
GET / HTTP/1.1
|
||
|
|
Host: [allowed-external-host]
|
||
|
|
|
||
|
|
GET / HTTP/1.1
|
||
|
|
Host: [internal-host]
|
||
|
|
```
|
||
|
|
|
||
|
|
### First-request Routing
|
||
|
|
|
||
|
|
In some configurations, a front-end server may use the **Host header of the first request** to determine the back-end routing for that request, and then persistently route all subsequent requests from the same client connection to the same back-end connection. This can be demonstrated as:
|
||
|
|
|
||
|
|
```
|
||
|
|
GET / HTTP/1.1
|
||
|
|
Host: example.com
|
||
|
|
|
||
|
|
POST /pwreset HTTP/1.1
|
||
|
|
Host: psres.net
|
||
|
|
```
|
||
|
|
|
||
|
|
This issue can potentially be combined with [Host header attacks](https://portswigger.net/web-security/host-header), such as password reset poisoning or [web cache poisoning](https://portswigger.net/web-security/web-cache-poisoning), to exploit other vulnerabilities or gain unauthorized access to additional virtual hosts.
|
||
|
|
|
||
|
|
{% hint style="info" %}
|
||
|
|
To identify these vulnerabilities, the 'connection-state probe' feature in HTTP Request Smuggler can be utilized.
|
||
|
|
{% endhint %}
|
||
|
|
|
||
|
|
{% hint style="success" %}
|
||
|
|
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
|
||
|
|
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
||
|
|
|
||
|
|
<details>
|
||
|
|
|
||
|
|
<summary>Support HackTricks</summary>
|
||
|
|
|
||
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
||
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
||
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
||
|
|
|
||
|
|
</details>
|
||
|
|
{% endhint %}
|