positive-security / dompdf-rce Goto Github PK

When cloning into the application, the file already is in the fonts folder:
application/dompdf/lib/fonts/exploitfont_normal_3f83639933428d70e74a061f39009622.php

If you delete this file so that the server is like it would be on a real world system (not preloaded with the attack) and run the instructions on the readme the file will never be added back making it imposssible to achive the RCE.

As you can se in the above screenshot exploit_font.php is never requested.

Installing the packages in the pull request that is not merged does not make a difference.

(Unsure if this is related)
I am ALSO running the same exploit on a different php system (Symfony + Dompdf V1.2.0) results in:
Uncaught PHP Exception Symfony\Component\Debug\Exception\ContextErrorException: "Warning: Invalid argument supplied for foreach()" at ...vendor/phenx/php-font-lib/src/FontLib/AdobeFontMetrics.php line 57

To fix the above fonts issue using a different payload font worked.

Hoping this is just a config issue on my system.

Using this in a CTF and in the README you use PHP to host the css and php file for the exploit. In order for this exploit to work you need to return the php file with the tags but it gets executed when you use a PHP server of course.

Hosting with python works:

python3 -m http.server 9001

The exploit server should not be php, otherwise, it will just execute phpinfo on the attacker side, use a python HTTP server instead

Please fix this as this is misleading