Exercise 1-4 Using a Web browser, go to www.securityfocus.com. What information is provided under the BugTraq tab? Under the Vulnerabilities tab? On the Vulnerabilities tab, select Microsoft as the Vendor and Windows Messenger as the title. Look for a PNG Buffer Overflow vulnerability. What information is provided under the Exploit tab? What does it mean? How could an attacker use this information? How could a security manager?