The ADONewConnection Connect function in adodb.php in XAMPP 1.6.0a and earlier for Windows uses untrusted input for the database server hostname which allows remote attackers to trigger a library buffer overflow and execute arbitrary code via a long host parameter or have other unspecified impact. NOTE: it could be argued that this is an issue in mssql_connect (CVE-2007-1411.1) in PHP or an issue in the ADOdb Library and the proper fix should be in one of these products; if so then this should not be treated as a vulnerability in XAMPP.