Two weeks ago, we told you about Apple's iOS update 9.3.3, which closed a software exploit that would've allowed an attacker to steal an iPhone or iPad's stored passwords with a single text message.
Today, Apple released another update to address newly discovered security flaws. The new patch, iOS 9.3.4, fixes a memory corruption vulnerability that could potentially lead to malicious code execution.
The discovery of the security flaw is credited to the Pangu Team who exploited the bug for their 9.3.3 jailbreaking tool. As you probably know by now, jailbreaking is a risky way of bypassing Apple's software restrictions on iOS devices, allowing a user to install unauthorized apps and services.
It is a practice that is highly discouraged by Apple since it could lead to even more security holes that hackers could exploit. In fact, several users reported that their Facebook, PayPal, and credit accounts were hacked after using the Pangu jailbreaking tool.
In effect, iOS 9.3.4 will render the Pangu jailbreaking tool useless and will prevent other memory corruption exploits using the same software flaw from happening.
Apple recommends that all users with iOS 9 devices install the update as soon as possible.
Interestingly, in the security support document for the patch, Apple did not mention the jailbreaking exploit but specifies an iOS software service called the IOMobileFrameBuffer instead. The IOMobileFrameBuffer is said to be an iOS system extension that manages the display screen's frame buffer.
With the highly anticipated release of iOS 10 coming soon in September, this could very well be the last patch for iOS 9. As long as there are no further critical exploits discovered between now and iOS 10's public debut, 9.3.4 will be the final iOS 9 update we will see.
To update your iOS device to 9.3.4, open Settings >> General >> Software Update, then tap "Download and Install." The upgrade process is automatic but may require a restart.
This update is available for iPhone 4s and newer, iPad 2 and newer, and 5th generation iPod Touch and newer.
To read more about iOS 9.3.4, check Apple's support page.