Apple has officially signed off the 11.4 iOS version to prevent users from downgrading their devices to lower iOS version.
Apple yesterday released iOS 12 Beta 4 updates for iPhone, iPad, and iPod touch devices, along with stopping all versions of iOS 11.4, including Beta 1, Beta 2. , 3, … to avoid users downgrade to these versions to take advantage of the vulnerability jailbreak programmer CoolStar exploited before.
As you know, last week, 20-year-old CoolStar from the US took advantage of two vulnerabilities exploited in versions 11.3.1 of iOS 11 to return as “multipath” and “vfs” to jailbreak the iPhone, iPad, and iPod touch devices. Soon after, though, Apple has locked these versions of iOS, but three versions of iOS 11.4 Beta 1, 2 and 3 have been discovered that could exploit these two vulnerabilities to enable the jailbreak has not patched these two holes and will continue to sign for these 3 beta versions.
To date, Apple has officially stopped sign of all iOS versions except iOS version 11.4.1. Users will not be able to downgrade to versions lower than 11.4.1. For those who are still in version 11.4 and are looking forward to a new vulnerability to be able to jailbreak the device can continue to stay in this version. Reports say a new flaw has been found on iOS 11.4 and up to 12 Beta that could be exploited to jailbreak. Jailbreaking tools for this version may soon be released in the future once the 12th iOS version officially launched.
