CVE-2020-15197: In Tensorflow before version 2.3.1, the `SparseCountSparseOutput` implementation does not validate that the input argume

TensorFlow before version 2.3.1 has a bug in the `SparseCountSparseOutput` function where it doesn't check that input data is in the correct format, specifically that the `indices` tensor (a data structure holding array positions) has the right shape. Attackers can exploit this by sending incorrectly shaped data, which causes the program to crash and creates a denial of service (a type of attack that makes a service unavailable). This vulnerability affects TensorFlow systems where users can control input data.