CVE-2021-29602: Division by zero in TFLite's implementation of `DepthwiseConv`
Impact The implementation of the DepthwiseConv TFLite operator is vulnerable to a division by zero error:
cc int numinputchannels = SizeOfDimension(input, 3); TFLITEENSUREEQ(context, numfilterchannels % numinputchannels, 0);
An attacker can craft a model such that input's fourth dimension would be 0.
Patches We have patched the issue in GitHub commit cbda3c6b2dbbd3fbdc482ff8c0170a78ec2e97d0.
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. The implementation of the DepthwiseConv TFLite operator is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/1a8e885b864c818198a5b2c0cbbeca5a1e833bc8/tensorflow/lite/kernels/depthwiseconv.cc#L287-L288). An attacker can craft a model such that input's fourth dimension would be 0. 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-2021-29602?
CVE-2021-29602 is classified as a high severity vulnerability due to the potential for a division by zero error.
How do I fix CVE-2021-29602?
To fix CVE-2021-29602, upgrade TensorFlow to version 2.4.2 or later, or install one of the patched versions like 2.3.3, 2.2.3, or 2.1.4.
Which versions of TensorFlow are affected by CVE-2021-29602?
CVE-2021-29602 affects TensorFlow versions prior to 2.1.4 and versions in the ranges 2.2.0 to 2.2.3, 2.3.0 to 2.3.3, and 2.4.0 to 2.4.2.
What type of vulnerability is CVE-2021-29602?
CVE-2021-29602 is a software vulnerability related to a division by zero error in the implementation of the DepthwiseConv operator in TensorFlow.
Is CVE-2021-29602 a critical vulnerability?
While it is classified as high severity, its impact may vary depending on the specific application and usage of the affected TensorFlow components.