CVE-2020-15209: NULL Pointer Dereference
(updated )
In tensorflow-lite, a crafted TFLite
model can force a node to have as input a tensor backed by a nullptr
buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one. The runtime assumes that these buffers are written to before a possible read, hence they are initialized with nullptr
. However, by changing the buffer index for a tensor and implicitly converting that tensor to be a read-write one, as there is nothing in the model that writes to it, we get a null pointer dereference.
References
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