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XNU vm_map_copy Optimization Issue

XNU vm_map_copy Optimization Issue
Posted Jan 31, 2019
Authored by Google Security Research, Ian Beer

XNU vm_map_copy optimization which requires atomicity is not atomic. This violates the semantics of mach message OOL memory, and leads to TOCTOU issues which can lead to memory corruption.

tags | exploit
advisories | CVE-2019-6205
SHA-256 | b373ad17106c25ccfb2435934691e9a515824d6d61c83d2a4930737e86b27e33
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