This is why security-conscious folks prefer open source software. No one wants to audit every line of code they use (nor is that possible). But if one relies

This is why security-conscious folks prefer open source software. No one wants to audit every line of code they use (nor is that possible). But if one relies on relatively popular open source software, just the fact that someone else could have audited it helps a lot. Add on to that the fact that you can use a linux distribution which keeps an eye on the vulnerabilities reported in the wild and updates the packages for you, and you are much better off over someone who only uses closed-source software and hopes and prays.