Oracle 建议撤消 PUBLIC 对功能强大的程序包的 EXECUTE 权限
程序包 UTL_FILE
程序包 DBMS_RANDOM
UTL_HTTP
UTL_SMTP
UTL_TCP
解决:
revoke execute on utl_file from public;
revoke execute on DBMS_RANDOM from public;
revoke execute on UTL_HTTP from public;
revoke execute on UTL_SMTP from public;
revoke execute on UTL_TCP from public;