What was the root cause of the Heartbleed bug which systems are vulnerable and why?
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.
Which type of overflow problem was exhibited with the Heartbleed bug?
The Heartbleed vulnerability is a memory buffer overflow, where if the machine receives less packets than it is expecting to receive, it randomly grabs bits of information from memory to pad out the response to the correct size.
Why is the Heartbleed vulnerability in OpenSSL called that?
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.
What kind of bug is in OpenSSL heartbeat?
Bug is in the OpenSSL’s implementation of the TLS/DTLS ( transport layer security protocols) heartbeat extension (RFC6520). When it is exploited it leads to the leak of memory contents from the server to the client and from the client to the server.
What kind of vulnerability is the Heartbleed bug?
The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. This weakness allows stealing the information protected, under normal conditions, by the SSL/TLS encryption used to secure the Internet.
Can a vulnerable heartbeat extension code be activated?
No, vulnerable heartbeat extension code is activated regardless of the results of the handshake phase negotiations. Only way to protect yourself is to upgrade to fixed version of OpenSSL or to recompile OpenSSL with the handshake removed from the code. Who found the Heartbleed Bug?