According to this information http://thehill.com/policy/technology/229907-panetta-joins-oracle-board former CIA Director Leon Panetta in 2015 joined the board of directors of Oracle. As we all know CIA and privacy is not equal. So I have the question - virtual box is secure from backdoors and other CIA tricks in source code or Guest Additions?
Any link to the reports of audit for the presence of backdoors and vulnerabilities?
Panetta aside, VBox is a buggy piece of trash riddles with security bugs. There are other libre alternatives you can switch to and not look back.