title: Code Execution via Ruby Eval function
body: <p>I am trying to perform code execution in ruby eval() by first breaking out of string by injecting ("). The following code is used for injection.</p>
  
  <pre><code>myuser"%2B`[system('uname')]`%2B"
  </code></pre>
  
  <p>I am not recieving an error but the command between the backtick is not executing.</p>
  
  <p>I am trying to inject into the username value below.</p>
  
  <pre><code>eval "\"Hello "+params['username']+"\""
  </code></pre>