high
7.1
CWE
125
Advisory Published
Advisory Published
Updated

CVE-2021-41223: Heap OOB read in `FusedBatchNorm` kernels

First published: Fri Nov 05 2021(Updated: )

### Impact The [implementation](https://github.com/tensorflow/tensorflow/blob/e71b86d47f8bc1816bf54d7bddc4170e47670b97/tensorflow/core/kernels/fused_batch_norm_op.cc#L1292) of `FusedBatchNorm` kernels is vulnerable to a heap OOB: ```python import tensorflow as tf tf.raw_ops.FusedBatchNormGrad( y_backprop=tf.constant([i for i in range(9)],shape=(1,1,3,3),dtype=tf.float32) x=tf.constant([i for i in range(2)],shape=(1,1,1,2),dtype=tf.float32) scale=[1,1], reserve_space_1=[1,1], reserve_space_2=[1,1,1], epsilon=1.0, data_format='NCHW', is_training=True) ``` ### Patches We have patched the issue in GitHub commit [aab9998916c2ffbd8f0592059fad352622f89cda](https://github.com/tensorflow/tensorflow/commit/aab9998916c2ffbd8f0592059fad352622f89cda). 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 Please consult [our security guide](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md) for more information regarding the security model and how to contact us with issues and questions. ### Attribution This vulnerability has been reported by members of the Aivul Team from Qihoo 360.

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
Google TensorFlow<2.4.4
Google TensorFlow>=2.5.0<2.5.2
Google TensorFlow>=2.6.0<2.6.1
pip/tensorflow-gpu<2.4.4
2.4.4
pip/tensorflow-gpu>=2.5.0<2.5.2
2.5.2
pip/tensorflow-gpu>=2.6.0<2.6.1
2.6.1
pip/tensorflow-cpu<2.4.4
2.4.4
pip/tensorflow-cpu>=2.5.0<2.5.2
2.5.2
pip/tensorflow-cpu>=2.6.0<2.6.1
2.6.1
pip/tensorflow<2.4.4
2.4.4
pip/tensorflow>=2.5.0<2.5.2
2.5.2
pip/tensorflow>=2.6.0<2.6.1
2.6.1

Remedy

https://github.com/tensorflow/tensorflow/commit/aab9998916c2ffbd8f0592059fad352622f89cda

Remedy

https://github.com/tensorflow/tensorflow/security/advisories/GHSA-f54p-f6jp-4rhr

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-41223?

    CVE-2021-41223 has been classified with a high severity due to the potential for heap out-of-bounds access.

  • How do I fix CVE-2021-41223?

    To fix CVE-2021-41223, upgrade to TensorFlow version 2.4.4, 2.5.2, or 2.6.1 depending on your current version.

  • What systems are affected by CVE-2021-41223?

    CVE-2021-41223 affects various versions of Google TensorFlow prior to 2.4.4 and between other specified versions.

  • What type of vulnerability is CVE-2021-41223?

    CVE-2021-41223 is a heap out-of-bounds vulnerability found in the FusedBatchNorm implementation.

  • What is the impact of CVE-2021-41223?

    The impact of CVE-2021-41223 could potentially lead to exploitation and data corruption due to improper memory handling.

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