CVE-2021-35958: Path Traversal
First published: Wed Jun 30 2021(Updated: )
** DISPUTED ** TensorFlow through 2.5.0 allows attackers to overwrite arbitrary files via a crafted archive when tf.keras.utils.get_file is used with extract=True. NOTE: the vendor's position is that tf.keras.utils.get_file is not intended for untrusted archives.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Google TensorFlow | <=2.5.0 | |
| <=2.5.0 |
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Reference Links
- https://docs.python.org/3/library/tarfile.html#tarfile.TarFile.extractall
- https://github.com/tensorflow/tensorflow/blob/b8cad4c631096a34461ff8a07840d5f4d123ce32/tensorflow/python/keras/README.md
- https://github.com/tensorflow/tensorflow/blob/b8cad4c631096a34461ff8a07840d5f4d123ce32/tensorflow/python/keras/utils/data_utils.py#L137
- https://keras.io/api/
- https://vuln.ryotak.me/advisories/52
Frequently Asked Questions
What is the severity of CVE-2021-35958?
CVE-2021-35958 is classified as a moderate severity vulnerability due to the potential for arbitrary file overwrites.
How do I fix CVE-2021-35958?
To mitigate CVE-2021-35958, avoid using the tf.keras.utils.get_file method with extract=True on untrusted archives.
Which versions of TensorFlow are affected by CVE-2021-35958?
CVE-2021-35958 affects versions of TensorFlow from 0.1.0 up to and including 2.5.0.
Can CVE-2021-35958 lead to remote code execution?
CVE-2021-35958 itself does not directly lead to remote code execution, but can allow an attacker to overwrite arbitrary files on the system.
Is there a recommended workaround for CVE-2021-35958?
The recommended workaround for CVE-2021-35958 is to validate and sanitize all inputs to tf.keras.utils.get_file before extraction.
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