CVE-2020-15191
If a user passes an invalid argument to dlpack.to_dlpack
the expected
validations will cause variables to bind to nullptr
while setting a status
variable to the error condition.
However, this status
argument is not properly
checked:
dlm_tensor->dl_tensor.data = TFE_TensorHandleDevicePointer(h, status);
dlm_tensor->dl_tensor.dtype = GetDlDataType(data_type, status);
Hence, code following these methods will bind references to null pointers:
dlm_tensor->dl_tensor.shape = &(*shape_arr)[0];
dlm_tensor->dl_tensor.strides = &(*stride_arr)[0];
This is undefined behavior and reported as an error if compiling with
-fsanitize=null
.
TensorFlow 2.2.0, 2.3.0.
We have patched the issue in 22e07fb204386768e5bcbea563641ea11f96ceb8 and will release a patch release for all affected versions.
We recommend users to upgrade to TensorFlow 2.2.1 or 2.3.1.
Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.
This vulnerability has been discovered through a variant analysis of a vulnerability reported by members of the Aivul Team from Qihoo 360.