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PHP "open_basedir" Symlink Security Bypass Vulnerability Advisory Available in Danish 

Secunia Advisory: SA22235  
Release Date: 2006-10-04
Last Update: 2006-10-13

Critical:
Less critical
Impact: Security Bypass
Where: Local system
Solution Status: Unpatched

Software:PHP 4.0.x
PHP 4.1.x
PHP 4.2.x
PHP 4.3.x
PHP 4.4.x
PHP 5.0.x
PHP 5.1.x

CVE reference:CVE-2006-5178 (Secunia mirror)

This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released!


Description:
Stefan Esser has reported a vulnerability in PHP, which can be exploited by malicious, local users to bypass certain security restrictions.

The vulnerability is caused due to a race condition in the handling of symlinks and can be exploited to bypass the open_basedir protection mechanism.

The vulnerability has been reported in PHP4 and PHP5.

Solution:
Disable the "symlink()" function in php.ini.

Provided and/or discovered by:
Stefan Esser

Changelog:
2006-10-12: Added CVE reference.

Original Advisory:
http://www.hardened-php.net/advisory_082006.132.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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