Let’s say there’s a log4j-type vuln and your app is affected. So an attacker can trigger an RCE in your app, which is running in, say, an EC2 instance in a VPC. A well-configured app server instance will have only necessary packages on it, and hopefully not much for dev tools. The instance will also run with certain privileges through IAM and then there won’t be creds on the instance for the attacker to steal.
Typically an RCE like this runs a small script that will download and run a more useful piece of malware, like a webshell. If the webshell doesn’t download, the attacker probably is moving onto the next victim.
I was responding more to "Same with trusting the private network. That’s fine and dandy until attackers are in your network, and now they have free rein because you assumed you could keep the bad people outside the walls protecting your soft, squishy insides."
Obviously this can apply to insiders in a typical corporate network, but it also applies to trust in a prod VPC environment.
