By Recx

An example-driven method of securing Oracle APEX applicationsAs a quick program improvement framework, Oracle program exhibit (APEX) permits web content to simply be created in accordance with facts inside an Oracle database. utilizing just a internet browser, you could advance and installation specialist functions which are either quickly and safe. although, as with all site, there's a protection chance and possibility, and securing APEX functions calls for a few particular wisdom of the framework. Written by way of famous safeguard experts Recx, this ebook indicates you the right kind how one can enforce your APEX purposes to make sure that they aren't susceptible to assaults. Real-world examples of quite a few safeguard vulnerabilities exhibit assaults and exhibit the ideas and most sensible practices for making purposes safe. Divides insurance into 4 sections, 3 of which hide the most sessions of chance confronted by means of internet functions and the forth covers an APEX-specific defense mechanismAddresses the protection concerns which may come up, demonstrating safe program designExamines the most typical classification of vulnerability that enables attackers to invoke activities on behalf of different clients and entry delicate dataThe lead-by-example procedure featured during this serious publication teaches you simple "hacker" abilities as a way to enable you to validate and safe your APEX functions.

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Extra info for Hands-On Oracle Application Express Security: Building Secure Apex Applications

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THE PROBLEM Cross-Site Scripting issues arise in web applications because data provided by the user is included within the site content, without correct validation or encoding to ensure the data is safe. Any web application that takes data from an untrusted source (such as the user) and includes this data without any modifications within any response page, could potentially be vulnerable to a Cross-Site Scripting attack. This process is fairly integral to most web applications, and serves to explain why Cross-Site Scripting is the most prevalent class of security risk faced by web applications.

When authenticating users based on the traditional credentials of username and password, here is some 舠best practice舡 guidance that you should consider: Account lockout: If a user attempts authentication with an invalid password a number of times, consider rejecting future access for a certain period (the chosen threshold and timeout depends on the sensitivity of the application and the corporate security policy). Password complexity: Users invariably choose the simplest password they can, so an application should enforce a level of complexity so attackers cannot guess valid user credentials (again, the chosen policy depends on the application).

N=2931656620523226290 A number of possible values for the full identifier of the upload exist, calculated as follows: Total possibilities a (20523 蜢 20176 蜢 1) ȕ (226290 蜢 226210 蜢 1) a 346 ȕ 79 a 27,334 If the attacker makes a request for each possible identifier, he would (eventually) be able to access the file uploaded by the other user. You have basically two concerns here: The unique identifier for uploaded files is sequential and potentially predictable. The method of accessing uploaded content (via a request to the p function in the URL) offers no mechanism of requiring authentication or enforcing authorization.

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