"On 9 November 2004, in a conversation with Gartner, Oracle declined to provide more detailed information about vulnerabilities its security patch 68 is meant to fix. (This is Oracle's standard policy.) Oracle first issued the security patch on 31 August 2004, and reissued the warning on 14 October after proof of concept exploit code began circulating on the Internet. The patch affects Oracle Database Server, Oracle Application Server and Oracle Enterprise Manager. Oracle gives these patches its most serious "Severity 1" rating."
The complete article can be read here. The article discusses in some detail the issues and also gives a good list of recommendations to Oracles customers in relation to this patch. The authors also take issue at the fact that Oracle refuses to disclose if customers are vulnerable or not by not recognising the difference between releasing exploits and telling customers the implications of not being protected against a particular exploit.