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A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept (POC) local privilege escalation exploit for CVE-2021-30807, a vulnerability in the IOMobileFramebuffer kernel extension on iOS 14.6 and 14.7. The main exploit logic is implemented in 'IOMobileFramebufferUserClient.c', which interacts with IOKit services ('IOMobileFramebuffer' and 'IOSurfaceRoot') to trigger the vulnerability and establish kernel read/write primitives. The exploit requires device- and version-specific tuning, including memory address guessing and offset finding, as described in the README and supported by the 'alloc_averager.py' script. The Makefile automates building and deploying the exploit to a jailbroken iOS device. The repository also includes support files for array management, kernel hooks, and entitlements. The exploit does not provide a direct jailbreak or shell, but enables further exploitation by providing kernel memory access. No network endpoints are present; all actions are performed locally on the device.
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