sql_select.cc in MySQL 5.0.x before 5.0.32 and 5.1.x before 5.1.14 allows remote authenticated users to cause a denial of service (crash) via an EXPLAIN SELECT FROM on the INFORMATION_SCHEMA table, as originally demonstrated using ORDER BY.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11720
http://www.ubuntu.com/usn/usn-588-1
http://www.securityfocus.com/bid/28351
http://www.redhat.com/support/errata/RHSA-2008-0364.html
http://secunia.com/advisories/31687
http://secunia.com/advisories/30351
http://secunia.com/advisories/29443
http://lists.opensuse.org/opensuse-security-announce/2008-08/msg00006.html
http://dev.mysql.com/doc/refman/5.1/en/news-5-1-14.html
http://dev.mysql.com/doc/refman/5.0/en/releasenotes-es-5-0-32.html