Pluck 4.7.15 - Zip Slip Vulnerability

[Naia Ōkami]

Issue Summary
Pluck's module and theme installers are vulnerable to directory traversal (via zip slip).

Detailed Description
It is possible to upload a malicious zip file in order to traverse directories outside of the intended environment, potentially allowing arbitrary code execution which will run with the permissions of the user assigned to the webserver.

Reproduction Steps

1. Using the evilarc tool, create a zip archive containing a PHP file with a depth of 2 (python evilarch.py shell.php -d 2 -f wolf.zip)
2. Visit <pluck_domain>/admin.php?action=themeinstall and upload the malicious wolf.zip you created.
3. Visit <pluck_domain>/shell.php and you now have a PHP shell.

Impact
This vulnerability makes remote code execution under the privileges of the user running the webserver application possible.

[Bas Steelooper]

Could you perform a retest with the latest dev version?

[Naia Ōkami]

I confirm the Zip Slip vulnerability has been fixed.