CVE-2021-29530: NULL Pointer Dereference
TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger a null pointer dereference by providing an invalid permutation
to tf.raw_ops.SparseMatrixSparseCholesky
. This is because the implementation fails to properly validate the input arguments. Although ValidateInputs
is called and there are checks in the body of this function, the code proceeds to the next line in ValidateInputs
since OP_REQUIRES
is a macro that only exits the current function. Thus, the first validation condition that fails in ValidateInputs
will cause an early return from that function. However, the caller will continue execution from the next line. The fix is to either explicitly check context->status
or to convert ValidateInputs
to return a Status
. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.
References
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