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699 B
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20 lines
No EOL
699 B
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1175
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CAMediaTimingFunctionBuiltin is a class in QuartzCore. Its initWithCoder: method
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reads an Int "index" then passes that to builtin_function
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mov ebx, edi <-- controlled unsigned int
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mov r14d, ebx
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lea r15, __ZL9functions_0 ; functions
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mov rax, [r15+r14*8]
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if rax is non-null it's returned as an objective-c object pointer and the objective-c retain
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selector is sent to it.
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Serialized poc in attached file with an index of 12345678.
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tested on MacOS 10.12.3 (16D32)
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Proof of Concept:
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https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/42052.zip |