Stack-based buffer overflow in the phar_fix_filepath function in ext/phar/phar.c in PHP before 5.4.43, 5.5.x before 5.5.27, and 5.6.x before 5.6.11 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large length value, as demonstrated by mishandling of an e-mail attachment by the imap PHP extension.
http://www.securityfocus.com/bid/75970
http://www.php.net/ChangeLog-5.php
http://www.debian.org/security/2015/dsa-3344
http://openwall.com/lists/oss-security/2015/07/18/1
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=6dedeb40db13971af45276f80b5375030aa7e76f