The zend_inline_hash_func function in php-luasandbox in the Scribuntu extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to converting Lua data structures to PHP, as demonstrated by passing { [{}] 1 } to a module function. Per: http://cwe.mitre.org/data/definitions/476.html
"CWE-476: NULL Pointer Dereference"
Publication date: Mon, 12 May 2014 19:55:00 +0000