CVE-2014-3478

Desbordamiento de buffer en la función mconvert en softmagic.c en file anterior a 5.19, utilizado en el componente Fileinfo en PHP anterior a 5.4.30 y 5.5.x anterior a 5.5.14, permite a atacantes remotos causar una denegación de servicio (caída de aplicación) a través de una cadena Pascal manipulada en una conversión FILE_PSTRING.

A buffer overflow flaw was found in the way the File Information (fileinfo) extension processed certain Pascal strings. A remote attacker able to make a PHP application using fileinfo convert a specially crafted Pascal string provided by an image file could cause that application to crash.

The unserialize() function in PHP before 5.4.30 and 5.5.14 has a Type Confusion issue related to the SPL ArrayObject and SPLObjectStorage Types. It was discovered that PHP is vulnerable to a heap-based buffer overflow in the DNS TXT record parsing. A malicious server or man-in-the-middle attacker could possibly use this flaw to execute arbitrary code as the PHP interpreter if a PHP application uses dns_get_record() to perform a DNS query. A flaw was found in the way file parsed property information from Composite Document Files (CDF) files, where the mconvert() function did not correctly compute the truncated pascal string size. Multiple flaws were found in the way file parsed property information from Composite Document Files files, due to insufficient boundary checks on buffers. PHP contains a bundled copy of the file utility's libmagic library, so it was vulnerable to this issue. It has been updated to versions 5.5.14, which fix this issue and several other bugs. The phpinfo() function in PHP before 5.4.30 and 5.5.14 has a Type Confusion issue that can cause it to leak arbitrary process memory. Additionally, php-apc has been rebuilt against the updated php packages and the php-timezonedb packages has been upgraded to the 2014.5 version.