Once you’ve done that, it’s simply a case of running a basic command from the root of your application code: mvn dependency:tree You can check the usage section on the Maven site for how to install it. To install this plugin, you simply need to add it into the pom.xml of the application you’re looking to search through. The maven toolkit comes with a dependency plugin with a series of different commands to help you manage your dependencies and make informed choices. So, how do you generate a dependency tree to get the complete picture of your software? Create a dependency tree in Maven If you rely only on your direct dependencies, you’re getting a fraction of the actual picture, and that isn’t enough to effectively identify the Log4j2 vulnerability and tackle this bug. There are usually far, far more transitive dependencies than direct dependencies. These are known as transitive dependencies. However, these dependencies will also have their own dependencies. Your dependency file shows all of the dependencies that your application directly relies on. Why can’t I just look in my dependency file? This tree represents all the dependencies that your application relies on. Maven comes with many convenient tools that will enable you to generate what is known as a dependency tree. Maven is one of the two most popular dependency and build management tools. So how can you take action with your applications? Detecting the vulnerable version in Maven For example, if you use Cloudflare, you may be exposed, but all is not lost. The other two are equally important, though. You can only really take action on the first item, as you can imagine. If another partner of yours with access to your system depends on Log4j 2.14.1 or less If a software-as-a-service (SaaS) provider you use depends on Log4j 2.14.1 or less If your in-house software depends on Log4j 2.14.1 or less There are a few ways that the Log4j2 vulnerability can pose a danger to your company. It is very common for applications to log user input, which is quite dangerous. In that case, that is an attack vector that may be able to exploit this command, since the user can input arbitrary code into the logs. Suppose your application logs some unsanitized input from the user, for example, the contents of a payload or a username. This may seem a little niche at first, especially since users may not have access to the logs, but this points to a very dangerous attack vector. The vulnerability, CVE-2021-44228, is a remote code execution bug that allows users to control the contents of log messages to execute whatever code they like. Register Now What is the Log4j2 vulnerability, and how serious is it?
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