Just yesterday, was made public a critical vulnerability in OpenSSL.

The vulnerability is related to the lack of adequate bounds checking in one of the procedures expansion Heartbeat (RFC6520) protocol TLS / DTLS. Due to the small mistakes anyone can gain access to the computer's memory, whose communication "protected" vulnerable version of OpenSSL. In particular, the attacker gains access to the private key, user name and password and all content to be transmitted in encrypted form. When this leaves no traces of penetration into the system.