So what exactly is the bug anyway?
Here’s a very quick rundown:
A potentially critical problem has surfaced in the widely used OpenSSL cryptographic library. It is nicknamed “Heartbleed” because the vulnerability exists in the “heartbeat extension” (RFC6520) to the Transport Layer Security (TLS) and it is a memory leak (“bleed”) issue. User passwords and other important data may have been compromised on any site affected by the vulnerability.
The vulnerability is particularly dangerous for two reasons:
- Potentially critical data is leaked.
- The attack leaves no trace.