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Heartbleed is a security bug disclosed in April 2014 in the OpenSSL cryptography library, which is a widely used implementation of the Transport Layer Security (TLS) protocol. Heartbleed may be exploited regardless of whether the party using a vulnerable OpenSSL instance for TLS is a server or a client. It results from improper input validation (due to a missing bounds check) in the implementation of the TLS heartbeat extension, thus the bug’s name derives from “heartbeat”. The vulnerability is classified as a buffer over-read,  a situation where more data can be read than should be allowed.

Heartbleed is registered in the Common Vulnerabilities and Exposures system as CVE-2014-0160. The federal Canadian Cyber Incident Response Centre issued a security bulletin advising system administrators about the bug. A fixed version of OpenSSL was released on April 7, 2014, on the same day Heartbleed was publicly disclosed.

At the time of disclosure, some 17% (around half a million) of the Internet’s secure web servers certified by trusted authorities were believed to be vulnerable to the attack, allowing theft of the servers’ private keys and users’ session cookies and passwords. The Electronic Frontier Foundation, Ars Technica, and Bruce Schneider all deemed the Heartbleed bug “catastrophic”. Forbes cybersecurity columnist Joseph Steinberg wrote, “Some might argue that [Heartbleed] is the worst vulnerability found (at least in terms of its potential impact) since commercial traffic began to flow on the Internet.”

A British Cabinet spokesman recommended that “People should take advice on changing passwords from the websites they use… Most websites have corrected the bug and are best placed to advise what action, if any, people need to take.” On the day of disclosure, the Tor Project advised anyone seeking “strong anonymity or privacy on the Internet” to “stay away from the Internet entirely for the next few days while things settle.”

As of May 20, 2014, 1.5% of the 800,000 most popular TLS-enabled websites were still vulnerable to Heartbleed.

TLS implementations other than OpenSSL, such as GnuTLS, Mozilla’s Network Security Services, and the TLS stack used by Microsoft products, were not affected because the defect existed in the OpenSSL’s implementation of TLS rather than in the Internet protocol itself.

Optionsbleed is especially threatening for people in shared hosting environments.
A technological boom in medicine both encouraged medical institutions to use exclusively information systems in processing data and led to the emergence of new types of technological equipment and personal devices that can be used to interact with traditional systems and networks.

This means that the threats that are relevant for them can also be relevant for medical systems.
HackerOne is bringing bug hunting and software testing to open source developers to help make open source software more secure and safer to use. A lot of modern tools and technologies depend on open source software, so a security flaw can wind up h...
A new type of data leak has come to light that could impact millions of people around the globe.

Google Project Zero, the research effort to find and fix critical software security flaws, reported that a vulnerability on the Cloudflare security service could enable the leak of passwords and data.

According to Cloudflare, the flaw could have allowed leaks of sensitive data from thousands of websites over a six-month period.

This incident has been dubbed Cloudbleed by some people in the cyber-security community because the threat was potentially as serious as the "Heartbleed" OpenSSL cryptography flaw that was reported in 2014 which posed a serious security threat to thousands of websites.

Cloudflare says it has patched the data leak flaw and moved quickly to purge any leaked data that may have circulated on search engines. While the full scope of the Cloudflare leak and exactly how many users were affected hasn’t been disclosed, this is the latest in a string of recent data privacy threats to affect internet users worldwide.

This slide show provides more details about the cause of the flaw and discusses why Cloudbleed is a serious problem.
You may have a problem lurking in your open source components and not know it.
Start making a list...
Potential scope of issue evokes comparisons to Heartbleed.
Heartbleed-style classic buffer overrun blunder strikes in 2017 Big-name websites leaked people's private encryption keys and personal information into strangers' browsers, due to a Cloudflare bug uncovered by Google security researchers.…
"Ticketbleed" bug in F5 firewalls is no Heartbleed, but it still poses a threat.
The OpenSSL Project has addressed some moderate-severity security flaws, and administrators should be particularly diligent about applying the patches since there are still 200,000 systems vulnerable to the Heartbleed flaw.OpenSSL updated the 1.0.2 ...
 That lingering Hearbleed flaw recently discovered in 200,000 devices is more insidious than that number indicates.According to a report posted by Shodan, the Heartbleed vulnerability first exposed in April 2014 was still found in 199,594 internet-accessible devices during a scan it performed last weekend.[ 18 surprising tips for security pros. | Discover how to secure your systems with InfoWorld's Security Report newsletter. ]But according to open-source security firm Black Duck, about 11 percent of more than 200 applications it audited between Oct. 2015 and March 2016 contained the flaw, which enables a buffer overread that endangers data from clients and servers running affected versions of OpenSSL.To read this article in full or to leave a comment, please click here
US still has more than 42,000 websites vulnerable to the flaw, which can allow an attacker to steal data directly from websites and users.
Almost 200,000 servers and devices are still vulnerable to Heartbleed, the OpenSSL flaw patched nearly three years ago. The numbers come from search engine Shodan, which released data showing U.S. servers hosted on Amazon AWS are disproportionately vulnerable to the flaw. “There’s a lot to be worried about with this data, but also a lot that’s unsurprising,” said Tim Jarrett senior director of security, Veracode. The Shodan analysis released over the weekend is part of the search engine’s Heartbleed Report (2017-01). It paints a gloomy picture when it comes to Heartbleed mitigation. The report indicates that almost 52,000 Apache HTTPD servers remain vulnerable and exposed to the internet, in particular versions 2.2.22 and 2.2.15. Amazon Web Services hosts the highest number of vulnerable devices (6,380), followed by Verizon Wireless (4,330) and German-based ISP Cronon AG (2,290). “The initial media blizzard for Heartbleed helped secure hundreds of thousands of devices (from 600,000 down to 200,000) but the subsequent follow-up has been lackluster as the problem keeps lingering,” said John Matherly, Shodan founder. He points out that the vast majority of affected services actually support TLSv1.2. “This means they support good encryption, unfortunately their dependencies are old,” he said. Heartbleed was an internet-wide bug that in 2014 affected millions of Linux, UNIX and Apple machines running vulnerable versions of the OpenSSL library. The Heartbleed vulnerability can result in the revelation of 64 KB of memory to any client or server that is connected. In April of 2014, fixes for versions of OpenSSL were quickly pushed out. “Most Heartbleed vulnerabilities are reported in the U.S. This makes sense given the prevalence of web applications hosted in Amazon AWS and Verizon as well as other US-based ISPs,” Jarrett said. He said part of the issue is that it’s easy to create new servers in AWS that don’t enforce the same type of safety provisions as they once required. “What used to require a sysadmin and a capital expenditure can now be done with a few lines of code. And we know that both real and virtual servers are easy to forget about, particularly when created outside of normal IT processes. So it’s unsurprising that some of these ‘forgotten servers’ are unpatched and dangerous,” Jarrett said. The Shodan data shows the overwhelming impacted services are HTTPS with 148,420 vulnerable servers followed by HTTPS (port 8443) with 23,600 servers and then Webmin, the sys admin interface for Unix (5,970).