The unc0ver team said on its official website that the tool has been widely tested on various software versions of IOS devices, including the iPhone 12 Pro max running IOS 14.3. The unc0ver team said the tool is based on a vulnerability in IOS's Sandbox system.
Apple released IOS 14.4 and iPad OS 14.4 in January, which fixed kernel and WebKit vulnerabilities. The fix affects the jailbreak of all iPhones and iPads running IOS or pre iPad OS 14. According to a recent tweet by IOS hacker and developer pwn20wnd, unc0ver took advantage of the kernel vulnerability in the IOS 14.4 patch and found a way to escape from the previous IOS version. He said that the new version of unc0ver provides "optimal speed and stability."
We learned that IOS devices upgraded to IOS 14.4 are not compatible with the new unc0ver jailbreak tool, and it is impossible to downgrade to IOS 14.3.
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