CVE-2021-37666: Reference binding to nullptr in `RaggedTensorToVariant` in TensorFlow

Published Aug 12, 2021
·
Updated

Impact An attacker can cause undefined behavior via binding a reference to null pointer in tf.rawops.RaggedTensorToVariant:

python import tensorflow as tf

tf.rawops.RaggedTensorToVariant( rtnestedsplits=[], rtdensevalues=[1,2,3], batchedinput=True) The implementation has an incomplete validation of the splits values, missing the case when the argument would be empty.

Patches We have patched the issue in GitHub commit be7a4de6adfbd303ce08be4332554dff70362612.

The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.

For more information Please consult our security guide 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.

Other sources

TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can cause undefined behavior via binding a reference to null pointer in tf.rawops.RaggedTensorToVariant. The implementation has an incomplete validation of the splits values, missing the case when the argument would be empty. We have patched the issue in GitHub commit be7a4de6adfbd303ce08be4332554dff70362612. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.

Affected Software

15 affected componentsFixes available
pip/tensorflow-gpu=2.5.0
2.5.1
pip/tensorflow-gpu>=2.4.0<2.4.3
2.4.3
pip/tensorflow-gpu<2.3.4
2.3.4
pip/tensorflow-cpu=2.5.0
2.5.1
pip/tensorflow-cpu>=2.4.0<2.4.3
2.4.3
pip/tensorflow-cpu<2.3.4
2.3.4
pip/tensorflow=2.5.0
2.5.1
pip/tensorflow>=2.4.0<2.4.3
2.4.3
pip/tensorflow<2.3.4
2.3.4
Google TensorFlow>=2.3.0<2.3.4
Google TensorFlow>=2.4.0<2.4.3
Google TensorFlow=2.5.0
Google TensorFlow=2.6.0-rc0
Google TensorFlow=2.6.0-rc1
Google TensorFlow=2.6.0-rc2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade pip/tensorflow-gpu to a version that resolves this vulnerability.

    Fixed in 2.5.1
  2. Upgrade

    Upgrade pip/tensorflow-gpu to a version that resolves this vulnerability.

    Fixed in 2.4.3
  3. Upgrade

    Upgrade pip/tensorflow-gpu to a version that resolves this vulnerability.

    Fixed in 2.3.4
  4. Upgrade

    Upgrade pip/tensorflow-cpu to a version that resolves this vulnerability.

    Fixed in 2.5.1
  5. Upgrade

    Upgrade pip/tensorflow-cpu to a version that resolves this vulnerability.

    Fixed in 2.4.3
  6. Upgrade

    Upgrade pip/tensorflow-cpu to a version that resolves this vulnerability.

    Fixed in 2.3.4
  7. Upgrade

    Upgrade pip/tensorflow to a version that resolves this vulnerability.

    Fixed in 2.5.1
  8. Upgrade

    Upgrade pip/tensorflow to a version that resolves this vulnerability.

    Fixed in 2.4.3
  9. Upgrade

    Upgrade pip/tensorflow to a version that resolves this vulnerability.

    Fixed in 2.3.4
  10. Upgrade

    Upgrade tensorflow to a version that resolves this vulnerability.

    Fixed in 2.6.0Patch be7a4de6adfbd303ce08be4332554dff70362612
  11. Upgrade

    Upgrade tensorflow to a version that resolves this vulnerability.

    Fixed in 2.5.1Patch be7a4de6adfbd303ce08be4332554dff70362612
  12. Upgrade

    Upgrade tensorflow to a version that resolves this vulnerability.

    Fixed in 2.4.3Patch be7a4de6adfbd303ce08be4332554dff70362612
  13. Upgrade

    Upgrade tensorflow to a version that resolves this vulnerability.

    Fixed in 2.3.4Patch be7a4de6adfbd303ce08be4332554dff70362612

Event History

Aug 12, 2021
CVE Published
via MITRE·09:40 PM
Data Sourced
via MITRE·09:40 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·10:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Aug 25, 2021
Advisory Published
via GitHub·02:42 PM

Frequently Asked Questions

1

What is the severity of CVE-2021-37666?

CVE-2021-37666 has been classified with a medium severity level due to the potential for undefined behavior.

2

How do I fix CVE-2021-37666?

To remediate CVE-2021-37666, update TensorFlow to a version equal to or greater than 2.5.1.

3

Which versions of TensorFlow are affected by CVE-2021-37666?

CVE-2021-37666 affects TensorFlow versions from 2.3.0 to below 2.5.1, including 2.4.0 to 2.4.3 and the specific release candidates for 2.6.0.

4

What kind of attack can exploit CVE-2021-37666?

An attacker can exploit CVE-2021-37666 by causing undefined behavior in the `tf.raw_ops.RaggedTensorToVariant` operation.

5

Is CVE-2021-37666 specific to any operating system?

CVE-2021-37666 is related to the TensorFlow library and is not limited to any specific operating system.

Company

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