Writing secure code in a way that prevents code injection might seem like an ordinary task, but there are many pitfalls along the way. For example, the fact that you (a developer) follow best security practices doesn’t mean that others are doing the same. You’re likely using open source packages in your application. How do you know if those were developed securely? What if insecure code like
eval() exists there? Let’s dive into it.
As a key secure coding convention, do not allow any dynamic code execution in the application. This means you should avoid language constructs like
eval and code strings passed to
setTimeout() or the
Function constructor. Secondly, avoid serialization which could be vulnerable to injection attacks that execute code in the serialization process. Lastly, perform dependency scanning to ensure that your application isn’t susceptible to this attack due to third-party open source components. Furthermore, if you use a static code analysis tool like Snyk Code, you can find these potential code injection security vulnerabilities in your or your colleagues’ code.
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