Secunia

A vulnerability has been identified in PHP, potentially allowing malicious people to view sensitive data or bypass an administrative restriction.

The problem arises on systems serving multiple virtual hosts using the Apache web server. Administratively configured settings from one virtual host may be applied (leaked) to other virtual hosts if the same Apache child process is used to access the different virtual hosts.

This can reportedly be exploited to view the source of PHP files, overwrite "register_globals" settings and more. Other vulnerabilities may potentially also be exploited via this issue.

The vulnerability has been reported in PHP version 4.3.4 and prior.

Solution
The vulnerability has been fixed in PHP 4.3.5 and later.
Further details available in Customer Area

Provided and/or discovered by
Reported by multiple individuals (see the original bug reports for details).

Changelog
Further details available in Customer Area

Original Advisory
http://bugs.php.net/bug.php?id=25753

Deep Links
Links available in Customer Area