Apple has released iOS 4.3.4 for the iPhone (GSM model), iPod touch, and iPad, and iOS 4.2.9 for the iPhone (CDMA model) to address multiple vulnerabilities. These vulnerabilities may allow an attacker to execute arbitrary code or operate with escalated privileges.
US-CERT encourages users and administrators to review Apple Support Articles HT4802 and HT4803 and apply any necessary updates to help mitigate the risks.