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Bug #30610 cURL functions bypass open_basedir
Submitted: 2004-10-29 10:23 UTC Modified: 2004-10-29 10:38 UTC
From: guillaume dot maes at celeonet dot fr Assigned:
Status: Not a bug Package: cURL related
PHP Version: 4.3.9 OS: Linux
Private report: No CVE-ID: None
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 [2004-10-29 10:23 UTC] guillaume dot maes at celeonet dot fr 
Description:
------------
PHP cURL functions bypass open_basedir
protection, so users can navigate through
filesystem.

For example, setting "open_basedir" in php.ini to
"/var/www/html" anybody can retrieve "/etc/parla"
using cURL functions

This vulnerability has been discovered wednesday :http://www.securitytrap.com/mail/bugtraq/2004/Oct/0287.html





Reproduce code:
---------------
<?php
$ch = curl_init("file:///etc/parla");
$file=curl_exec($ch);
echo $file
?> 

Expected result:
----------------
The execution of the file /etc/parla is not allowed because the value of openbase_dir restriction is /var/www/html.

Actual result:
--------------
The file /etc/parla is executed. 

If /etc/parla contents :

<body><html> Test of vulnerability </html></body>

The execution of this code with cURL functions showns the message.

Patches

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 [2004-10-29 10:38 UTC] derick@php.net 
Please do not submit the same bug more than once. An existing
bug report already describes this very problem. Even if you feel
that your issue is somewhat different, the resolution is likely
to be the same. 

Thank you for your interest in PHP.

#30609
 
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