Self Check 1292 Why cant CSRF attacks be thwarted by checking the Referer

Self check 1292 why cant csrf attacks be thwarted by

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Self-Check 12.9.2. Why can’t CSRF attacks be thwarted by checking the Referer: header of an HTTP request? The header can be trivially forged. 12.10 The Plan-And-Document Perspective Non-functional requirements can be more important than adding new features, as violations can cause loss of millions of dollars, millions of users, or both. For example, sales for in the fourth quarter of 2012 was $23.3B, so the loss of income due to Amazon being down just one hour would average $10M. That same year a break-in of the Nebraska Student Information System revealed social security numbers of anyone who applied to the University of Nebraska since 1985, estimated as 650,000 people. If customers can’t trust a SaaS app, they will stop using it no matter what the set of features. Performance. Performance is not a topic of focus in conventional software engineering, in part because it has been the excuse for bad practices and in part because it is well covered elsewhere. Performance can be part of the non-functional requirements and then later in acceptance-level testing to ensure the performance requirement is met. Release Management. Plan-and-document processes often produce software products that have major releases and minor releases. Using the Rails as an example, the last number of version 3.2.12 is a minor release, the middle number is a major release, and the first number is such a large change that it breaks APIs so that apps need to be ported again to this version. A release includes everything: code, configuration files, any data, and documentation. Release management includes picking dates for the release, information on how it will be distributed, and documenting everything so that you know what exactly is in the release and how to make it again so that it is easy to change when you have to make the next release. Release management is considered a case of configuration management in Plan-and- Document processes, which we review in Section 10.7 . Reliability. The main tool in our bag to make a system dependable is redundancy. By having more hardware than the absolute minimum needed to run the app and store the data, the system has the
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potential to continue even if a component fails. As all physical hardware has a non-zero failure rate, one redundancy guideline is to make sure there is no single point of failure , as it can be the Achilles’ Heel of a system. Generally, the more redundancy the lower the chance of failure. As highly redundant systems can be expensive, it is important to have an adult conversation with the customer to see how dependable the app must be. Dependability is holistic, involving the software and the operators as well as the hardware. No matter how dependable the hardware is, errors in the software and mistakes by the operators can lead to outages that reduce the mean time to failure ( MTTF )ndexMean time to failure (MTTF). As dependency is a function of the weakest link in the chain, it may be more effective to train operators
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  • Spring '19
  • Dr.Marcos

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