designer as well as security researcher Linus Henze has made public an exploit that exists within Safari for iOS as well as macOS as well as which impacts iOS 12.1 as well as below. The bug itself manifests itself in the method RegEx is matched as well as handled on impacted platforms.
This latest work as well as publication has been put out into the public domain by Henze because of the truth that Apple has patched the discovery in the latest version of WebKit, which means that it is no longer offered in iOS 12.1.1 as well as later.
However, from a jailbreak perspective, this might potentially provide somebody with the right understanding as well as skillset the basis to put together one more JailbreakMe-esque development that would enable gadgets to be liberated directly from within Safari on an iOS device.
If successful, as well as if the other appropriate parts might be put together to make this possible, it would mean that there would be no requirement to set up any type of jailbreak IPA data via tools like Cydia Impactor as well as no requirement to continually go with that process when the gadget has been rebooted or turned off. all of the jailbreak code injection might be done with Safari on the gadget without any requirement for any type of other tools or software.
In terms of the exploit itself, Henze explains it as a “WebKit-RegEx-Exploit”:
This is an optimization error in the method RegEx matching is handled. By setting lastIndex on a RegEx item to a JavaScript item which has the function toString defined, you can run code although the JIT believes that RegEx matching is side impact free.
He likewise references that the bug is extremely similar to a previous bug discovered by @5aelo. The release of this bug, will, of course, mean that the jailbreak neighborhood will when once again be up in arms about the prospective of a jailbreak coming for iOS 12.x.
Currently, it’s only possible to publicly liberate an iOS gadget running as much as iOS 11.4 beta 3 running a tool like Electra or unc0ver. To date, we’ve been privy to several bugs as well as exploits within Apple’s iOS 12 platform however none of those have yielded in the release of any type of public jailbreak.
If this progresses, we will be sure to keep you in the loop.
(Source: @LinusHenze [Twitter])
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