The php_zip_make_relative_path function in php_zip.c in PHP 5.2.x before 5.2.9 allows context-dependent attackers to cause a denial of service (crash) via a ZIP file that contains filenames with relative paths, which is not properly handled during extraction.
http://www.php.net/releases/5_2_9.php
http://www.openwall.com/lists/oss-security/2009/04/09/1
http://www.openwall.com/lists/oss-security/2009/04/01/9
http://support.apple.com/kb/HT3865
http://secunia.com/advisories/36701
http://secunia.com/advisories/35685
http://marc.info/?l=bugtraq&m=125017764422557&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
http://lists.apple.com/archives/security-announce/2009/Sep/msg00004.html
http://cvs.php.net/viewvc.cgi/php-src/ext/zip/php_zip.c?r1=1.1.2.48&r2=1.1.2.49