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What is Heartbleed? A coding error that caused a security crisis

13
Sep
2017
What is Heartbleed? A coding error that caused a security crisis

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Heartbleed is a vulnerability that came to light in April of 2014; it allowed attackers unprecedented access to sensitive information, and it was present on thousands of web servers, including those running major sites like Yahoo.

Heartbleed was caused by a flaw in OpenSSL, an open source code library that implemented the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. In short, a malicious user could easily trick a vulnerable web server into sending sensitive information, including usernames and passwords.

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