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CVE-2021-37678

9.3 · CRITICAL

TensorFlow is an end-to-end open source platform for machine learning.

Published Aug 12, 2021CWE-502EPSS 0.45%

Overview

CVE-2021-37678 is a critical-severity vulnerability. It was published on August 12, 2021 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

TensorFlow is an end-to-end open source platform for machine learning. In affected versions TensorFlow and Keras can be tricked to perform arbitrary code execution when deserializing a Keras model from YAML format. The [implementation](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/python/keras/saving/model_config.py#L66-L104) uses `yaml.unsafe_load` which can perform arbitrary code execution on the input. Given that YAML format support requires a significant amount of work, we have removed it for now. We have patched the issue in GitHub commit 23d6383eb6c14084a8fc3bdf164043b974818012. 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/tensorflow/tensorflow/commit/23d6383eb6c14084a8fc3bdf164043b974818012GitHubgithub.com/tensorflow/tensorflow/security/advisories/GHSA-r6jx-9g48-2r5rGitHubgithub.com/tensorflow/tensorflow/commit/23d6383eb6c14084a8fc3bdf164043b974818012GitHubgithub.com/tensorflow/tensorflow/security/advisories/GHSA-r6jx-9g48-2r5r

How CyberStrike helps

Frequently asked questions

What is CVE-2021-37678?

CVE-2021-37678 is a critical-severity vulnerability. It was published on August 12, 2021 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2021-37678?

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-37678?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-37678?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-37678 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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