Apple has released iOS 5.0.1 for the iPhone 3GS, iPhone 4, iPhone 4S, iPod 3rd generation or later, iPad, and iPad 2 to address multiple vulnerabilities. These vulnerabilities may allow an attacker execute arbitrary code or obtain sensitive information.
US-CERT encourages users and administrators to review Apple Support Article HT5052 and apply any necessary updates to help mitigate the risk.