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source: http://www.securityfocus.com/bid/11400/info IBM DB2 is reported prone to a denial of service vulnerability when DTS to string conversion is carried out. It is reported that during a DTS to string conversion a trap occurs if an empty formatting string is provided. The vulnerability is exposed in the 'to_char' and 'to_date' conversion functions. select to_char('aaa','') from sysibm.sysdummy1 select to_date('aaa', '') from sysibm.sysdummy1