FPE in convolutions with zero size filters

Impact

The implementations for convolution operators trigger a division by 0 if passed empty filter tensor arguments.

Patches

We have patched the issue in GitHub commit f2c3931113eaafe9ef558faaddd48e00a6606235.

The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.

For more information

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Attribution

This vulnerability has been reported by members of the Aivul Team from Qihoo 360.