What is code injection?
Code injection is a general term for a type of software vulnerability where unvalidated input is evaluated by an application. It is fairly common on web applications that rely on user input through forms that lack appropriate input/output data validation. This flaw can be exploited by attackers by injecting malicious code in the language of the application into it, which will then be executed by the server-side interpreter for that language.
Consequences of code injection can be dire:
Lack of accountability
Denial of access
What differs code injection from command injection is that an attacker is only limited by the functionality of the injected language. If the language of the target application is Java, the injection is limited by what Java is capable of.
Types of code injection
There are multiple types of code injection vulnerabilities, some specific for certain languages or certain applications.
Here are a few well-known ones:
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How Can You Prevent Code Injection Attacks?
Validate and sanitize inputs
Accept only a limited set of values via whitelisting or conditional switching.
Use a SAST solution
Use a code analysis tool like Kiuwan to test for vulnerabilities related to code injection.
Give the account the database calls run under only limited privileges, like select.
Avoid vulnerable evaluation constructs
Use dedicated, language-specific features to safely process user-supplied arguments.
Make Code Injection Prevention Part of your DevOps Process
Take a DevOps approach to code injection prevention thanks to integration with leading CI/CD tools.
Scan your code securely on your own local server as part of your build process.
Share scan results with your team with the help of a dashboard in the cloud.
Generate an automatic action plan and calculate the effort required to remediate vulnerabilities.
Customize the plan based on your team’s resources and track progress towards your goals.
On the right: Kiuwan Action Plans
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