Database Security Brief: The Oracle Critical Patch Update for April 2007.
You can download it from the following link: https://packetstormsecurity.com/files/download/56067/NGSSoftware-OracleCPUAPR2007.pdf
Source: https://packetstormsecurity.com/files/56067/NGSSoftware-OracleCPUAPR2007.pdf.html