Is reactive patching the answer to protecting against known vulnerabilities?
                            
The time in which it takes hackers to write malicious code to exploit a known vulnerability is rapidly shrinking.  The appearance of the Sasser worm in the shortest time ever, just 18 days between the revealing of a Microsoft vulnerability and the beginning of an attack, marks a new low point in the fight against cyber crime.  With the protective window of opportunity getting ever smaller, the task of patching vulnerable software is becoming an increasingly endless one.