CVE-2021-37647: NULL Pointer Dereference
(updated )
TensorFlow is an end-to-end open source platform for machine learning. When a user does not supply arguments that determine a valid sparse tensor, tf.raw_ops.SparseTensorSliceDataset
implementation can be made to dereference a null pointer. The implementation has some argument validation but fails to consider the case when either indices
or values
are provided for an empty sparse tensor when the other is not. If indices
is empty, then code that performs validation (i.e., checking that the indices are monotonically increasing) results in a null pointer dereference. If indices
as provided by the user is empty, then indices
in the C++ code above is backed by an empty std::vector
, hence calling indices->dim_size(0)
results in null pointer dereferencing (same as calling std::vector::at()
on an empty vector).
References
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