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OS X Kernel AppleKeyStore Use-After-Free

OS X Kernel AppleKeyStore Use-After-Free
Posted Mar 22, 2016
Authored by Google Security Research, ianbeer

The AppleKeyStore userclient uses an IOCommandGate to serialize access to its userclient methods, however by racing two threads, one of which closes the userclient (which frees the IOCommandGate) and one of which tries to make an external method call we can cause a use-after-free of the IOCommandGate.

tags | exploit
systems | linux
advisories | CVE-2016-1755
SHA-256 | 1db8ce601471ad3e19f7c84c23572709a3952990a28f5b5d130277dfb0f639dc
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