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TITLE:
PHP ZipArchive::extractTo() Directory Traversal Vulnerability

SECUNIA ADVISORY ID:
SA32964

VERIFY ADVISORY:
http://secunia.com/advisories/32964/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PHP 5.2.x
http://secunia.com/advisories/product/13446/

DESCRIPTION:
Stefan Esser has reported a vulnerability in PHP, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an input validation error within
the "ZipArchive::extractTo()" function when extracting ZIP archives.
This can be exploited to extract files to arbitrary locations outside
the specified directory via directory traversal sequences in a
specially crafted ZIP archive.

The vulnerability is reported in versions prior to 5.2.7.

SOLUTION:
Update to version 5.2.7.

PROVIDED AND/OR DISCOVERED BY:
Stefan Esser

ORIGINAL ADVISORY:
http://www.sektioneins.de/advisories/SE-2008-06.txt

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