The Zend_Db_Select::order function in Zend Framework before 1.12.7 does not properly handle parentheses, which allows remote attackers to conduct SQL injection attacks via unspecified vectors.
https://www.debian.org/security/2015/dsa-3265
http://www.securityfocus.com/bid/68031
http://secunia.com/advisories/58847
http://openwall.com/lists/oss-security/2014/07/11/4