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Bug #26471 Big security hole in directory acces system
Submitted: 2003-11-30 06:13 UTC Modified: 2003-11-30 07:31 UTC
From: hdf at vipmail dot hu Assigned:
Status: Not a bug Package: *Directory/Filesystem functions
PHP Version: 4.3.3 OS: Win32
Private report: No CVE-ID: None
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From: hdf at vipmail dot hu
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 [2003-11-30 06:13 UTC] hdf at vipmail dot hu
Description:
------------
It is possible (very easily) to scan the whole filesystem structure of the server, on wich the php script is running, including all partitiones and drives.
The problem is I think that there is no limiting option in php, about how many levels upwards in the directory tree are alowed for a script.
I have made a little "Troyan horse php script", wich can scan the filesystem of the server, and even read in the textfiles on it.

Reproduce code:
---------------
http://members.chello.hu/hdf13/MyPrograms/dirlist.zip

Expected result:
----------------
It runs perfectly, but it shouldn't. :)

Actual result:
--------------
The whole server filesystem is visible and browsable and textfiles in it are readeable. Serious security hole!

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 [2003-11-30 07:31 UTC] derick@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

It\'s not PHP\'s job to secure a webserver. And we have an \'open_basedir\' setting for this.
 
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