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User-defined functions in MySQL allow a user in the database to call binary libraries on the operating system. Creating a user-defined function requires insert privileges on the mysql.func table. By using specially crafted CREATE FUNCTION requests it may be possible for attackers to halt the system or execute remote code on some systems.

User-defined functions in MySQL allow a user in the database to call binary libraries on the operating system. Creating a user-defined function requires insert privileges on the mysql.func table. By using specially crafted CREATE FUNCTION requests it may be possible for attackers to halt the system or execute remote code on some systems.