ProFTPD Server 1.3.1, with NLS support enabled, allows remote attackers to bypass SQL injection protection mechanisms via invalid, encoded multibyte characters, which are not properly handled in (1) mod_sql_mysql and (2) mod_sql_postgres.
http://www.openwall.com/lists/oss-security/2009/02/11/5
http://www.openwall.com/lists/oss-security/2009/02/11/4
http://www.mandriva.com/security/advisories?name=MDVSA-2009:061
http://www.debian.org/security/2009/dsa-1730
http://security.gentoo.org/glsa/glsa-200903-27.xml