Session resumption vulnerability

1. What is session resumption?
2. How does TLS session resumption work?
3. Is TLS 1.3 vulnerable?
4. How do I fix weak SSL TLS key exchange vulnerability?
5. What is f5 SSL session resumption?
6. What is rtt in TLS?
7. What is the difference between TLS session resumption and renegotiation?
8. How long do TLS sessions last?
9. Does TLS protect data at rest?
10. Is TLS 1.2 still secure?
11. Has TLS 1.2 been hacked?
12. Which TLS versions are vulnerable?
13. What are session starts?
14. What is an IBM session?
15. How does HTTP session work?
16. How do sessions work in Java?
17. Why are sessions important?
18. What is session duration?
19. What is session vs page view?

What is session resumption?

In this case an "abbreviated handshake" can be used, which requires one roundtrip and also allows the client and server to reduce the CPU overhead by reusing the previously negotiated parameters for the secure session. This technique is called TLS Session Resumption.

How does TLS session resumption work?

Generally, the TLS session resumption functionality speeds up client reconnections, as no full TLS handshake needs to occur. Instead, a value known from a previous session is used to verify the authenticity of the connection.

Is TLS 1.3 vulnerable?

This vulnerability allows a remote unauthenticated attacker to cause a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only. Note: TLS 1.3 is disabled by default. This vulnerability affects only configurations where TLS 1.3 has been explicitly enabled.

How do I fix weak SSL TLS key exchange vulnerability?

Please check the application running on the ports on which this vulnerability is detected and Change the SSL/TLS server configuration to only allow strong key exchanges with a strong Key size of 2048 bits.

What is f5 SSL session resumption?

SSL session resumption allows a client and server to reuse previously negotiated SSL parameters. The ability to cache and reuse SSL session data (session IDs) can increase the transactions per second (TPS) by limiting processor-intensive SSL key exchange functions.

What is rtt in TLS?

The TLS 1.3 0-RTT mode enables a client reconnecting to a server to send encrypted application-layer data in “0-RTT” (“zero round-trip time”), without the need for a prior interactive handshake.

What is the difference between TLS session resumption and renegotiation?

Resumption restarts a previous TLS session in a new TCP connection, using the same TLS parameters. Renegotiation continues an existing TLS session in the same TCP connection, but changes some of the parameters.

How long do TLS sessions last?

It depends entirely on the configurations at both ends: how often the session should be re-keyed and how long a session should last. No single answer. Several minutes for the key; an hour or more, maybe even 8, for the session.

Does TLS protect data at rest?

The rest can use encrypted transport with SSL or TLS. When data is encrypted in transit, it can only be compromised if the session key can be compromised.

Is TLS 1.2 still secure?

While TLS 1.2 can still be used, it is considered safe only when weak ciphers and algorithms are removed. On the other hand, TLS 1.3 is new; it supports modern encryption, comes with no known vulnerabilities, and also improves performance.

Has TLS 1.2 been hacked?

The Raccoon attack is a newly discovered vulnerability in TLS 1.2 and earlier versions. It allows hackers (in certain situations) to determine a shared session key and use that to decrypt TLS communications between the server and client.

Which TLS versions are vulnerable?

While TLS 1.0 & TLS 1.1 are known to be very vulnerable, the TLS 1.2 protocol is considered to be much more secure and is thus recommended for use.

What are session starts?

Session Starts (SS)

The total number of sessions with a minimum duration of one minute in length that were started within the reported time period.

What is an IBM session?

A session is a series of requests to a servlet, originating from the same user at the same browser. Sessions allow applications running in a web container to keep track of individual users. For example, a servlet might use sessions to provide "shopping carts" to online shoppers.

How does HTTP session work?

The client establishes a TCP connection (or the appropriate connection if the transport layer is not TCP). The client sends its request, and waits for the answer. The server processes the request, sending back its answer, providing a status code and appropriate data.

How do sessions work in Java?

In simpler terms, a session is a state consisting of several requests and response between the client and the server. It is a known fact that HTTP and Web Servers are both stateless. Hence, the only way to maintain the state of the user is by making use of technologies that implement session tracking.

Why are sessions important?

Sessions can be analyzed in a way that reveals how users truly interact with an app. For example, session data can determine the average length of time users spend on an app as well as the time of day users are most likely to engage with a particular app.

What is session duration?

Session duration is defined as the time frame during which there are regular active interactions occurring between a user on a website. The session is timed out when there is no activity from the user for a predefined time duration (30 minutes by default).

What is session vs page view?

In web analytics, a session is either capped by exiting the website or by a period of user inactivity. Page Views, as commonly used with Google Analytics, is the count of times the content of a page is loaded or re-loaded.