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Again and again hackers use SQL injection to get information from the backend database. Is it fair to say because a relational database by its nature has all the links within the data sets (e.g., 1-to-1, 1-to-* and so on), therefore it enables a user with any form of access to illegally access everything, either in theory or practice?

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    The amount of other information compromised in the Ashley Madison attack (internal documents, network diagrams) makes it tremendously unlikely that it was a SQL injection attack. – gowenfawr Aug 19 '15 at 23:14
  • I wrote an article about possible attack vector regarding ashleymadison hack. linkedin.com/pulse/… – Michal Koczwara Aug 20 '15 at 1:41
  • @MichalKoczwara you also wrote about it here: security.stackexchange.com/q/97293/6253 – schroeder Aug 20 '15 at 4:20
  • @shroeder no this is a different crossdomain. – Michal Koczwara Aug 20 '15 at 5:30
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How data is related or not within the database has nothing to do with SQLi. Flat files, NoSQL, etc. will not affect the ability for a user to perform unauthorized access to data.

SQLi is about unsecured direct access to the database (in whatever form that is), resulting in a user manipulating that access in order to obtain data without the expected authorization.

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  • Authentication on NoSQL seems to be worse partially due to default authentication being remarkably trusting. – lloyd Aug 19 '15 at 22:39
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    yeah - I wasn't going to poke holes in the inherent security of the various database technologies because the question was more about SQLi in general. – schroeder Aug 19 '15 at 23:06

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