CVE-2021-29600: Division by zero in TFLite's implementation of `OneHot`

(updated )

The implementation of the OneHot TFLite operator is vulnerable to a division by zero error:

int prefix_dim_size = 1;
for (int i = 0; i < op_context.axis; ++i) {
prefix_dim_size *= op_context.indices->dims->data[i];
}
const int suffix_dim_size = NumElements(op_context.indices) / prefix_dim_size;

An attacker can craft a model such that at least one of the dimensions of indices would be 0. In turn, the prefix_dim_size value would become 0.

References

Code Behaviors & Features

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