PT-2021-18267 · Google · Tensorflow

Yakun Zhang + 1 · Published 2021-05-14 · Updated 2024-03-06 · CVE-2021-29516

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: TensorFlow versions prior to 2.5.0 TensorFlow version 2.4.2 TensorFlow version 2.3.3 TensorFlow version 2.2.3 TensorFlow version 2.1.4

Description: Calling tf.raw ops.RaggedTensorToVariant with arguments specifying an invalid ragged tensor results in a null pointer dereference. The implementation of RaggedTensorToVariant operations does not validate that the ragged tensor argument is non-empty. Since batched ragged contains no elements, batched ragged.splits is a null vector, thus batched ragged.splits(0) will result in dereferencing nullptr.

Recommendations: For TensorFlow versions prior to 2.5.0, update to version 2.5.0 or later. For TensorFlow version 2.4.2, apply the cherrypicked commit or update to a later version. For TensorFlow version 2.3.3, apply the cherrypicked commit or update to a later version. For TensorFlow version 2.2.3, apply the cherrypicked commit or update to a later version. For TensorFlow version 2.1.4, apply the cherrypicked commit or update to a later version. As a temporary workaround, consider avoiding the use of tf.raw ops.RaggedTensorToVariant with invalid ragged tensors until a patch is available.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BIT-TENSORFLOW-2021-29516

CVE-2021-29516

GHSA-84MW-34W6-2Q43

PYSEC-2021-153

PYSEC-2021-444

PYSEC-2021-642

Affected Products

Tensorflow

References · 12

• 🔥 https://github.com/tensorflow/tensorflow/security/advisories/GHSA-84mw-34w6-2q43 · Exploit
• https://github.com/tensorflow/tensorflow/commit/b055b9c474cd376259dde8779908f9eeaf097d93 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-29516 · Security Note
• https://osv.dev/vulnerability/PYSEC-2021-642 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-tensorflow-2021-29516 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-444 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-153 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29516 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-84mw-34w6-2q43 · Vendor Advisory
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-444.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-642.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-153.yaml · Note