Apple has always taken security on its devices very seriously. iOS, just like Android, Windows, Linux, macOS or any other existing operating system, they are not 100% safe and for sure that they have different vulnerabilities that are unknown to the manufacturers themselves or that are yet to be discovered.
Corellium, is a virtualization software company that illegally sells virtual copies of iOS, a company that has just seen how Apple's first lawsuit for trading with Apple's proprietary software has fallen without obtaining the approval of the Cupertino-based company in any case.
Amanda Gorton, founder of Corellium
As we can read in Forbes, Corellium was founded by Amanda Gorton and her husband Chris Wade, a well-known iOS hacker. This virtualization software allows users to test the operation of a virtualized iOS device to look for security flaws or test apps on different iOS devices and versions. In this way, if the device crashes or stops working, you just have to create a new virtualization.
If a security breach is discovered, it can quickly be test from which version of iOS you are. Apple presented a few days ago a program in which it rewards security researchers with up to a million dollars for the most clever ones who can hack the iOS kernel or that iOS devices can be affected by an attack without the user have to interact with the device in no time.
According to Apple, Corellium's business is based on infringing works protected by audio rights when trade with the illegal replica of your operating system and from copyrighted applications that run on the iPhone, iPad, and other Apple devices.