wo security companies have posted information and tools to help users track so-called "zero-day" bugs and sniff out software vulnerable to attack.On Tuesday, eEye Digital Security launched a Web site that posts information on current unpatched bugs for a variety of vendors' products, including those from Microsoft, Adobe, Apple, and others. As of Wednesday, the "Zero Day Tracker" site listed six zero-day vulnerabilities; all six affected Microsoft software.   more...