For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Although new iOS helpers such as TutuHelper have eaten into its user base, it still holds sway over old-time jailbreakers. Before you install it, keep the following things in mind. It works only on the jailbreak-able versions of iOS 9 and iOS 10. It doesn’t work with iOS 9.3.5, 10.2.1, 10.3, 10.3.1, 10.3.2, 10.3.3 and 11. It requires AppSync. It's safe install AppSync on iOS 9.3.5? A few days later i've installed and after i reboot my device i can see only my lockscreen and wallpaper, no apps, anything. Currently, iPhone 4s, iPad 2/3, iPod Touch 5 and iPad Mini support iOS 9.3.5 jailbreak, you can flash to iOS 9.3.5 and then jailbreak. This is a Semi-untethered jailbreak. So after reboot, the cydia and tweaks may not take effect, your iDevice is no longer jailbroken. Please restore your iOS 9.3.5 jailbreak as below. About the security content of iOS 9.3.5 This document describes the security content of iOS 9.3.5. For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Appsync Ios 9.3.5 The Phoenix jailbreak that was released recently for iOS 9.3.5 supports all 32-bit iOS devices that are running on this firmware. AppSync for iOS 10. For those who you who jailbroke your iOS 10 device know that AppSync Unified doesn’t work on the firmware yet but the tweak is still installable. However, once installed, the package will put your iPhone into bootloop. In other words, users will see the never ending restart on their device. Today, developer Karen.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.
iOS 9.3.5
Released August 25, 2016
Kernel
Available for: iPhone 4s and later, iPad 2 and later, iPod touch (5th generation) and later
Impact: An application may be able to disclose kernel memory
Description: A validation issue was addressed through improved input sanitization.
CVE-2016-4655: Citizen Lab and Lookout
Kernel
Available for: iPhone 4s and later, iPad 2 and later, iPod touch (5th generation) and later
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed through improved memory handling.
CVE-2016-4656: Citizen Lab and Lookout
WebKit
Appsync Ios 9.3.5 Cydia
Available for: iPhone 4s and later, iPad 2 and later, iPod touch (5th generation) and later
Impact: Visiting a maliciously crafted website may lead to arbitrary code execution
Appsync Ios 9.3.5
Description: A memory corruption issue was addressed through improved memory handling.
CVE-2016-4657: Citizen Lab and Lookout