The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. This weakness allows stealing the information protected, under normal conditions, by the SSL/TLS encryption used to secure the Internet. SSL/TLS provides communication security and privacy over the Internet for applications such as web, email, instant messaging (IM) and some virtual private networks (VPNs).
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.
What leaks in practice?
heartbleed.com have tested some of there own services from attacker’s perspective. They attacked themselves from outside, without leaving a trace. Without using any privileged information or credentials they were able steal from themselves the secret keys used for our X.509 certificates, user names and passwords, instant messages, emails and business critical documents and communication.
How to stop the leak?
As long as the vulnerable version of OpenSSL is in use it can be abused. Fixed OpenSSL has been released and now it has to be deployed. Operating system vendors and distribution, appliance vendors, independent software vendors have to adopt the fix and notify their users. Service providers and users have to install the fix as it becomes available for the operating systems, networked appliances and software they use.
Who has been Scanned for venerability?
You can find a list of sites and other domains that has been tested for the Heartbleed, The list is updated regularly and frequently giving you an idea who is infected, some of the major companies have already given its customers to change their passwords. You can find the scans Here.
Social Networks-
Below are some of the big list of networks we use everyday [Thank you Mashable for this list].
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| Unclear | Yes | YesYes | “We added protections for Facebook’s implementation of OpenSSL before this issue was publicly disclosed. We haven’t detected any signs of suspicious account activity, but we encourage people to … set up a unique password.” | |
| No | No | No | “We didn’t use the offending implementation of OpenSSL in www.linkedin.com or www.slideshare.net. As a result, HeartBleed does not present a risk to these web properties.” | |
| Tumblr | Yes | Yes | YesYes | “We have no evidence of any breach and, like most networks, our team took immediate action to fix the issue.” |
| Unclear | Unclear | Unclear | Twitter wrote that OpenSSL “is widely used across the internet and at Twitter. We were able to determine that [our] servers were not affected by this vulnerability. We are continuing to monitor the situation.”Twitter has not yet responded to Mashable‘s request for comment. |
Other Companies
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| Apple | Unclear | Unclear | Unclear | Apple has not yet responded to a request for comment. |
| Amazon | No | No | No | “Amazon.com is not affected.” |
| Yes | Yes | YesYes* | “We have assessed the SSL vulnerability and applied patches to key Google services.” Search, Gmail, YouTube, Wallet, Play, Apps and App Engine were affected; Google Chrome and Chrome OS were not.*Google said users do not need to change their passwords, but because of the previous vulnerability, better safe than sorry. | |
| Microsoft | No | No | No | Microsoft services were not running OpenSSL, according to LastPass. |
| Yahoo | Yes | Yes | YesYes | “As soon as we became aware of the issue, we began working to fix it… and we are working to implement the fix across the rest of our sites right now.” Yahoo Homepage, Yahoo Search, Yahoo Mail, Yahoo Finance, Yahoo Sports, Yahoo Food, Yahoo Tech, Flickr and Tumblr were patched. More patches to come, Yahoo says. |
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| AOL | No | No | No | AOL told Mashable it was not running the vulnerable version of the software. |
| Gmail | Yes | Yes | YesYes* | “We have assessed the SSL vulnerability and applied patches to key Google services.”*Google said users do not need to change their passwords, but because of the previous vulnerability, better safe than sorry. |
| Hotmail / Outlook | No | No | No | Microsoft services were not running OpenSSL, according to LastPass. |
| Yahoo Mail | Yes | Yes | YesYes | “As soon as we became aware of the issue, we began working to fix it… and we are working to implement the fix across the rest of our sites right now.” |
Stores and Commerce
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| Amazon | No | No | No | “Amazon.com is not affected.” |
| Amazon Web Services(for website operators) | Yes | Yes | YesYes | Most services were unaffected or Amazon was already able to apply mitigations (see advisory note here). Elastic Load Balancing, Amazon EC2, Amazon Linux AMI, Red Hat Enterprise Linux, Ubuntu, AWS OpsWorks, AWS Elastic Beanstalk and Amazon CloudFront were patched. |
| eBay | Unclear | Unclear | Unclear | “The vast majority of our services were not impacted and our users can continue to shop securely on our marketplace.” |
| GoDaddy | Yes | Yes | YesYes | “We’ve been updating GoDaddy services that use the affected OpenSSL version.” Full Statement |
| PayPal | No | No | No | “Your PayPal account details were not exposed in the past and remain secure.” Full Statement |
| Target | No | No | No | “[We] launched a comprehensive review of all external facing aspects of Target.com… and do not currently believe that any external-facing aspects of our sites are impacted by the OpenSSL vulnerability.” |
Banks and Brokerages
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| Bank of America | No | No | No | “We’re currently taking precautions and steps to protect customer data from this threat and have no reason to believe any customer data has been compromised in the past.” |
| Chase | No | No | No | “These sites don’t use the encryption software that is vulnerable to the Heartbleed bug.” |
| E*Trade | No | No | No | E*Trade is still investigating. |
| Fidelity | No | No | No | “We have multiple layers of security in place to protect our customer sites and services.” |
| PNC | No | No | No | “We have tested our online and mobile banking systems and confirmed that they are not vulnerable to the Heartbleed bug.” |
| Schwab | No | No | No | “Efforts to date have not detected this vulnerability on Schwab.com or any of our online channels.” |
| Scottrade | No | No | No | “Scottrade does not use the affected version of OpenSSL on any of our client-facing platforms.” |
| TD Ameritrade | No | No | No | TD Ameritrade “doesn’t use the versions of openSSL that were vulnerable.” |
| TD Bank | No | No | No | “We’re currently taking precautions and steps to protect customer data from this threat and have no reason to believe any customer data has been compromised in the past.” |
| U.S. Bank | No | No | No | “We do not use OpenSSL for customer-facing, Internet banking channels, so U.S. Bank customer data is NOT at risk.” |
| Wells Fargo | No | No | No | No reason provided. |
Government and Taxes
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| 1040.com | No | No | No | “We’re not vulnerable to the Heartbleed bug, as we do not use OpenSSL.” |
| FileYour Taxes.com | No | No | No | “We continuously patch our servers to keep them updated. However, the version we use was not affected by the issue, so no action was taken.” |
| H&R Block | Unclear | No | Unclear | “We are reviewing our systems and currently have found no risk to client data from this issue.” |
| Healthcare .gov | Unclear | Unclear | Unclear | Healthcare.gov has not yet responded to a request for comment. |
| Intuit (TurboTax) | Yes | Yes | YesYes | Turbotax “has examined its systems and has secured TurboTax to protect against the “Heartbleed” bug.” Full Statement |
| IRS | Unclear | Unclear | Unclear | “The IRS continues to accept tax returns as normal … and systems continue operating and are not affected by this bug. We are not aware of any security vulnerabilities related to this situation.” |
Other
| Was it affected? | Is there a patch? | Do you need to change your password? | What did they say? | |
|---|---|---|---|---|
| Dropbox | Yes | Yes | YesYes | On Twitter: “We’ve patched all of our user-facing services & will continue to work to make sure your stuff is always safe.” |
| Evernote | No | No | No | “Evernote’s service, Evernote apps, and Evernote websites … all use non-OpenSSL implementations of SSL/TLS to encrypt network communications.”Full Statement |
| LastPass | Yes | Yes | YesYes | “Though LastPass employs OpenSSL, we have multiple layers of encryption to protect our users and never have access to those encryption keys.” |
| Netflix | Unclear | Unclear | Unclear | “Like many companies, we took immediate action to assess the vulnerability and address it. We are not aware of any customer impact.” |
| OKCupid | Yes | Yes | YesYes | “We, like most of the Internet, were stunned that such a serious bug has existed for so long and was so widespread.” |
| SoundCloud | Yes | Yes | YesYes | “We will be signing out everyone from their SoundCloud accounts … and when you sign back in, the fixes we’ve already put in place will take effect.” |
| Spark Networks (JDate, Christian Mingle) | No | No | No | Sites do not use OpenSSL. |
| Wunderlist | Yes | Yes | YesYes | “You’ll have to simply log back into Wunderlist. We also strongly recommend that you reset your password for Wunderlist.”Full Statement |
Its always good to change your passwords regardless especially if you’re sharing your hard earned money.
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