CVE-2021-29606: Heap OOB read in TFLite
Impact A specially crafted TFLite model could trigger an OOB read on heap in the TFLite implementation of SplitV:
cc const int inputsize = SizeOfDimension(input, axisvalue);
If axisvalue is not a value between 0 and NumDimensions(input), then the SizeOfDimension function will access data outside the bounds of the tensor shape array:
cc inline int SizeOfDimension(const TfLiteTensor t, int dim) { return t->dims->data[dim]; } Patches We have patched the issue in GitHub commit ae2daeb45abfe2c6dda539cf8d0d6f653d3ef412.
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.
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Attribution This vulnerability has been reported by members of the Aivul Team from Qihoo 360.
Other sources
TensorFlow is an end-to-end open source platform for machine learning. A specially crafted TFLite model could trigger an OOB read on heap in the TFLite implementation of SplitV(https://github.com/tensorflow/tensorflow/blob/c59c37e7b2d563967da813fa50fe20b21f4da683/tensorflow/lite/kernels/splitv.cc#L99). If axisvalue is not a value between 0 and NumDimensions(input), then the SizeOfDimension function(https://github.com/tensorflow/tensorflow/blob/102b211d892f3abc14f845a72047809b39cc65ab/tensorflow/lite/kernels/kernelutil.h#L148-L150) will access data outside the bounds of the tensor shape array. 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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-29606?
CVE-2021-29606 has a high severity due to the potential for an out-of-bounds read on the heap.
How do I fix CVE-2021-29606?
To fix CVE-2021-29606, upgrade TensorFlow to version 2.4.2 or later.
Which versions of TensorFlow are affected by CVE-2021-29606?
CVE-2021-29606 affects TensorFlow versions earlier than 2.1.4, between 2.2.0 and 2.2.3, between 2.3.0 and 2.3.3, and between 2.4.0 and 2.4.2.
What types of TFLite models are impacted by CVE-2021-29606?
CVE-2021-29606 impacts TFLite models that contain specially crafted data, which leads to the vulnerability.
Is CVE-2021-29606 related to a specific TensorFlow component?
Yes, CVE-2021-29606 specifically affects the Split_V implementation within TensorFlow Lite.