mirror of
https://github.com/carlospolop/hacktricks
synced 2024-12-29 22:43:11 +00:00
97 lines
4.6 KiB
Markdown
97 lines
4.6 KiB
Markdown
# PHP SSRF
|
|
|
|
{% 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 %}
|
|
|
|
### SSRF PHP functions
|
|
|
|
Some function such as **file\_get\_contents(), fopen(), file(), md5\_file()** accept URLs as input that they will follow making **possible SSRF vulnerabilities** if the use can control the data:
|
|
|
|
```php
|
|
file_get_contents("http://127.0.0.1:8081");
|
|
fopen("http://127.0.0.1:8081", "r");
|
|
file("http://127.0.0.1:8081");
|
|
md5_file("http://127.0.0.1:8081");
|
|
```
|
|
|
|
### Wordpress SSRF via DNS Rebinding
|
|
|
|
As [**explained in this blog post**](https://patchstack.com/articles/exploring-the-unpatched-wordpress-ssrf), even the Wordpress function **`wp_safe_remote_get`** is vulnerable to DNS rebinding, making it potentially vulnerable to SSRF attacks. The main validation it calls is **wp\_http\_validate\_ur**l, which checks that the protocol is `http://` or `https://` and that the port is one of **80**, **443**, and **8080**, but it's **vulnerable to DNS rebinding**.
|
|
|
|
Other vulnerable functions according to the post are:
|
|
|
|
* `wp_safe_remote_request()`
|
|
* `wp_safe_remote_post()`
|
|
* `wp_safe_remote_head()`
|
|
* `WP_REST_URL_Details_Controller::get_remote_url()`
|
|
* `download_url()`
|
|
* `wp_remote_fopen()`
|
|
* `WP_oEmbed::discover()`
|
|
|
|
### CRLF
|
|
|
|
Moreover, in some cases it might be even possible to send arbitrary headers via CRLF "vulnerabilities" in the previous functions:
|
|
|
|
```php
|
|
# The following will create a header called from with value Hi and
|
|
# an extra header "Injected: I HAVE IT"
|
|
ini_set("from", "Hi\r\nInjected: I HAVE IT");
|
|
file_get_contents("http://127.0.0.1:8081");
|
|
|
|
GET / HTTP/1.1
|
|
From: Hi
|
|
Injected: I HAVE IT
|
|
Host: 127.0.0.1:8081
|
|
Connection: close
|
|
|
|
# Any of the previously mentioned functions will send those headers
|
|
```
|
|
|
|
{% hint style="warning" %}
|
|
For more info about that CRLF vuln, check this bug [https://bugs.php.net/bug.php?id=81680\&edit=1](https://bugs.php.net/bug.php?id=81680\&edit=1)
|
|
{% endhint %}
|
|
|
|
Note that these function might have other methods to set arbitrary headers in requests, like:
|
|
|
|
```php
|
|
$url = "";
|
|
|
|
$options = array(
|
|
'http'=>array(
|
|
'method'=>"GET",
|
|
'header'=>"Accept-language: en\r\n" .
|
|
"Cookie: foo=bar\r\n" . // check function.stream-context-create on php.net
|
|
"User-Agent: Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.102011-10-16 20:23:10\r\n" // i.e. An iPad
|
|
)
|
|
);
|
|
|
|
$context = stream_context_create($options);
|
|
$file = file_get_contents($url, false, $context);
|
|
```
|
|
|
|
{% 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 %}
|