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Windows 7: Anatomy of OpenSSL's Heartbleed: Just four bytes trigger horror bug

10 Apr 2014   #1
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
Anatomy of OpenSSL's Heartbleed: Just four bytes trigger horror bug

The password-leaking OpenSSL bug dubbed Heartbleed is so bad, switching off the internet for a while sounds like a good plan.

A tiny flaw in the widely used encryption library allows anyone to trivially and secretly dip into vulnerable systems, from your bank's HTTPS server to your private VPN, to steal passwords, login cookies, private crypto-keys and much more.

How, in 2014, is this possible?

A simple script for the exploit engine Metasploit can, in a matter of seconds, extract sensitive in-memory data from systems that rely on OpenSSL 1.0.1 to 1.0.1f for TLS encryption. The bug affects about 500,000, or 17.5 per cent, of trusted HTTPS websites, we're told, as well as client software, email servers, chat services, and anything else using the aforementioned versions of OpenSSL.

A Guy

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 Anatomy of OpenSSL's Heartbleed: Just four bytes trigger horror bug

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