The Heartbleed OpenSSL Flaw: What You Need To Know

A widespread OpenSSL implementation flaw known as Heartbleed (CVE-2014-0160) introduced in late 2011 allows attackers to read up to 64KB of process memory via the TLS heartbeat extension, potentially exposing private keys, session cookies, credentials, and other sensitive data; users are strongly advised to upgrade to OpenSSL 1.0.1g, revoke and reissue affected keys and certificates, and treat session state as compromised while detection signatures and evidence of active exploitation remain limited.