backend/parser/parse_coerce.c in PostgreSQL 7.4.1 through 7.4.14, 8.0.x before 8.0.9, and 8.1.x before 8.1.5 allows remote authenticated users to cause a denial of service (daemon crash) via a coercion of an unknown element to ANYARRAY.
http://www.vupen.com/english/advisories/2006/4182
http://www.ubuntu.com/usn/usn-369-2
http://www.ubuntu.com/usn/usn-369-1
http://www.trustix.org/errata/2006/0059/
http://www.securityfocus.com/bid/20717
http://www.redhat.com/support/errata/RHSA-2007-0067.html
http://support.novell.com/techcenter/psdb/59650c03a8bc5ae310cd7898bd106ad2.html
http://support.avaya.com/elmodocs2/security/ASA-2007-117.htm
http://securitytracker.com/id?1017115
http://secunia.com/advisories/24577
http://secunia.com/advisories/23132
http://secunia.com/advisories/23048
http://secunia.com/advisories/22636
http://secunia.com/advisories/22606