Skip to main content

How Heartbleed bug weakened everyone's online safety

By Chester Wisniewski
April 10, 2014 -- Updated 1408 GMT (2208 HKT)
STORY HIGHLIGHTS
  • Researchers found a bug that could make public your private information online
  • Chester Wisniewski: A simple mistake in open-source computer code is responsible
  • All of us rely on the volunteer work that goes into open-source code, author says
  • He says companies and people need to realize we're all in this together

Editor's note: Chester Wisniewski is a senior security adviser at Sophos Inc., Canada. He researches computer security and privacy issues and is a regular contributor to the Naked Security blog. The opinions expressed in this commentary are solely those of the author.

(CNN) -- This week, researchers from Google and the Finnish security consulting group Codenomicon disclosed a bug, called Heartbleed, in OpenSSL, one of the most ubiquitous encryption software packages in use on the Internet.

Two thirds of the web sites and applications that allow you to do online banking or communicate privately through e-mail, voice or instant message use OpenSSL to protect your communications.

That is why a bug in OpenSSL that can render the private information you are transmitting across the wire visible to attackers is a very big deal.

The bug itself is a simple, honest mistake in the computer code that was intended to reduce the computing resources encryption consumes. The problem is that this bug made it past the quality assurance tests and has been deployed across the Internet for nearly two years.

Chester Wisniewski
Chester Wisniewski

This brings into question all the secure conversations we thought we were having on affected services over that time. A big deal indeed.

How does something like this happen? Aren't there a lot of people looking at this code? It is open source after all; anyone can take a peek.

Usually the availability of source code to public scrutiny results in applications being more secure and one could argue that is what happened here. Researchers at Google were looking carefully at the code and discovered this mistake. Unfortunately, that discovery came two years too late.

Fortunately, most major Web services have already applied fixes to the affected Web servers and services. The bad news is that smaller websites as well as many companies' products that rely on OpenSSL may linger for many more years without a fix.

To a degree, we are at the mercy of the website operators and companies who make security products to apply these fixes to protect us.

Some are suggesting that everyone should change all their passwords. While it is never a bad idea to change your passwords, increase their strength and ensure they are sufficiently unique, you should only do this after confirming the site has been fixed.

Too little attention is paid to the critical nature of the free software that keeps the Internet moving. We expect this army of volunteers to write and maintain much of the code that enables our fast and free Internet, all without payment, without support, in essence without a thought.

Recently, companies like Google have begun making an effort to rectify this situation through programs like Patch Rewards. Google offers to pay researchers to find bugs in commonly used open source software, including OpenSSL, so the community can work together to fix flaws more quickly, resulting in a safer Internet.

All of us have come to rely on the Internet socially, politically and economically. The billions of dollars a year being made by the tech giants would not be possible without the millions of donated hours that maintain free and open software like OpenSSL, Linux, Apache Web server, and Postfix mail server.

This is a fight for our privacy, security and our freedom to communicate.
Chester Wisniewski

Businesses, government and individuals all have something to offer that can help. This isn't a battle between Windows, Mac and Linux or some battle between free and commercial software. This is a fight for our privacy, security and our freedom to communicate.

For some of us what we can offer is coding talent, others financial support, and still others can test software more thoroughly to ensure the reliability and security of the resulting code.

The most important thing is to recognize the importance of our collective security and to realize that in the end we are all tangled together online. A weakness in one can affect us all.

Follow CNN Opinion on Twitter.

Join the conversation on Facebook.

ADVERTISEMENT
Part of complete coverage on
October 1, 2014 -- Updated 1947 GMT (0347 HKT)
Julian Zelizer says Jimmy Carter's message about the need to restore trust in public officials is a vital one, decades after the now 90-year-old he first voiced it
October 1, 2014 -- Updated 2156 GMT (0556 HKT)
Ford Vox says mistakes and missed opportunities along the line to a diagnosis of Ebola in a Liberian man have put Dallas residents at risk of fatal infection
October 1, 2014 -- Updated 2221 GMT (0621 HKT)
Pepper Schwartz says California is trying, but its law requiring step-by-step consent is just not the way hot and heavy sex proceeds on college campuses
October 2, 2014 -- Updated 0217 GMT (1017 HKT)
Mike Downey says long-suffering fans, waiting for good playoff news since 1985, finally get something to cheer about
October 1, 2014 -- Updated 2139 GMT (0539 HKT)
Steve Israel saysJohn Boehner's Congress and the tea party will be remembered for shutting down government one year ago
October 1, 2014 -- Updated 1856 GMT (0256 HKT)
Yep. You read the headline right, says Peter Bergen, writing on the new government that stresses national unity
October 1, 2014 -- Updated 2312 GMT (0712 HKT)
Hong Kong's pro-democracy demonstrators are but the latest freedom group to be abandoned by the Obama administration, says Mike Gonzalez
September 30, 2014 -- Updated 1653 GMT (0053 HKT)
Jeff Yang calls Ello a wakeup call to Facebook and Twitter, and a sign of hope for fast-rising upstarts Pinterest and Snapchat.
October 1, 2014 -- Updated 1423 GMT (2223 HKT)
Paul Waldman says the Secret Service should examine its procedures to make sure there are no threats to the White House--but without losing the openness so valuable to democracy
October 1, 2014 -- Updated 1455 GMT (2255 HKT)
Jesse Williams says the videotape and 911 call that resulted in police gunning down John Crawford at a Walmart reveals the fatal injustice of racial assumptions
September 30, 2014 -- Updated 2303 GMT (0703 HKT)
Mel Robbins says officials should drop the P.C. pose: The beheading in Oklahoma was not workplace violence. Plenty of evidence shows Alton Nolen was an admirer of ISIS.
September 30, 2014 -- Updated 1911 GMT (0311 HKT)
The Occupy Central movement has already achieved much by bringing greater attention to Hong Kong's struggle for democracy, William Piekos says..
September 30, 2014 -- Updated 1911 GMT (0311 HKT)
The Occupy Central movement has already achieved much by bringing greater attention to Hong Kong's struggle for democracy, writes William Piekos.
September 30, 2014 -- Updated 1413 GMT (2213 HKT)
As Prime Minister Narendra Modi visits America, Madeleine Albright says a world roiled by conflict needs these two great democracies to commit to moving their partnership forward
September 30, 2014 -- Updated 1404 GMT (2204 HKT)
John Sutter: Lake Providence, Louisiana, is the parish seat of the "most unequal place in America." And until somewhat recently, the poor side of town was invisible on Google Street View.
September 29, 2014 -- Updated 1311 GMT (2111 HKT)
Julian Zelizer says in the run up to the 2016 election the party faces divisions on its approach to the U.S.'s place in the world
September 29, 2014 -- Updated 1419 GMT (2219 HKT)
Ruben Navarrette says Common Core supporters can't devise a new set of standards and then fail to effectively sell it.
September 30, 2014 -- Updated 1329 GMT (2129 HKT)
Earlier this month, Kenyans commemorated the heinous attack on the Westgate Mall in Nairobi.
September 30, 2014 -- Updated 1859 GMT (0259 HKT)
David Wheeler says Colorado students are right to protest curriculum changes that downplays civil disobedience.
September 27, 2014 -- Updated 0158 GMT (0958 HKT)
Sally Kohn says when people click on hacked celebrity photos or ISIS videos, they are encouraging the bad guys.
September 26, 2014 -- Updated 1155 GMT (1955 HKT)
Loren Bunche says she walked by a homeless man every day and felt bad about it -- until one day she paused to get to know him
September 30, 2014 -- Updated 1332 GMT (2132 HKT)
ISIS grabs headlines on social media, but hateful speech is no match for moderate voices, says Nadia Oweidat.
September 29, 2014 -- Updated 1233 GMT (2033 HKT)
A new report counts jihadists fighting globally. The verdict? The threat isn't that big, says Peter Bergen.
September 23, 2014 -- Updated 2137 GMT (0537 HKT)
Ebola could become the biggest humanitarian disaster in a generation, writes former British Prime Minister Tony Blair
September 26, 2014 -- Updated 1658 GMT (0058 HKT)
ISIS has shocked the world. But will releasing videos of executions backfire? Four experts give their take.
September 26, 2014 -- Updated 1439 GMT (2239 HKT)
Eric Holder kicked off his stormy tenure as attorney general with a challenge to the public that set tone for six turbulent years as top law-enforcement officer.
September 26, 2014 -- Updated 1309 GMT (2109 HKT)
LZ Granderson says Obama was elected as a war-ending change agent, not a leader who would leave behind for his successor new engagement in Iraq and Syria. Is he as disappointed as the rest of us?
September 24, 2014 -- Updated 0910 GMT (1710 HKT)
Gayle Lemmon says the question now is how to translate all the high-profile feminizing into real gains for women
ADVERTISEMENT