The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. This compromises the secret keys used to identify the service providers and to encrypt the traffic, the names and passwords of the users and the actual content. This allows attackers to eavesdrop on communications, steal data directly from the services and users and to impersonate services and users.
As sites fix the bug on their end, it’s time for you to change your passwords. The Heartbleed bug allowed information leaks from a key safety feature that is supposed to keep your online communication private — email, banking, shopping, and passwords.
Don’t change all your passwords yet, though. If a company hasn’t yet updated its site, you still can’t connect safely. A new password would be compromised too.
Many companies are not informing their customers of the danger — or asking them to update their log-in credentials. So, here’s a handy password list.
Change these passwords now (they were patched)
Don’t worry about these (they don’t use the affected software, or ran a different version)
Don’t change these passwords yet (still unclear, no response)