A flaw in technology that protects passwords and personal information is affecting many popular websites. It's known as the "Heartbleed Bug," and by some estimates it's impacted over half a million sites. ABC News reports Yahoo, Google and Tumbler have installed security patches, and others are working to do the same. ABC News Senior Business Editor Sandy Cannold says there's not much the general public can do. "The danger of changing your password too early," said Cannold, "is that if the fix isn't in place then you've changed your password and you're still on a site that's being compromised."