Mandriva Linux Security Advisory - The mysql_change_db() function in MySQL 5.0.x before 5.0.40 did not restore THD::db_access privileges when returning from SQL SECURITY INVOKER stored routines, which allowed remote authenticated users to gain privileges. The federated engine in MySQL 5.0.x, when performing a certain SHOW TABLE STATUS query, did not properly handle a response with a small number of columns, which could allow a remote MySQL server to cause a denial of service (federated handler crash and daemon crash) via a response that lacks the minimum required number of columns.
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