PT-2021-18298 · Google · Tensorflow

Yakun Zhang + 1 · Published 2021-05-14 · Updated 2024-03-06 · CVE-2021-29547

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 versions 2.4.2 and earlier TensorFlow versions 2.3.3 and earlier TensorFlow versions 2.2.3 and earlier TensorFlow versions 2.1.4 and earlier

Description An attacker can cause a segfault and denial of service via accessing data outside of bounds in tf.raw ops.QuantizedBatchNormWithGlobalNormalization. This is because the implementation assumes the inputs are not empty. If any of these inputs is empty, .flat<T>() is an empty buffer, so accessing the element at index 0 is accessing data outside of bounds.

Recommendations For versions prior to 2.5.0, update to TensorFlow 2.5.0 or later. For versions 2.4.2 and earlier, update to TensorFlow 2.4.2 or later. For versions 2.3.3 and earlier, update to TensorFlow 2.3.3 or later. For versions 2.2.3 and earlier, update to TensorFlow 2.2.3 or later. For versions 2.1.4 and earlier, update to TensorFlow 2.1.4 or later. As a temporary workaround, consider avoiding the use of tf.raw ops.QuantizedBatchNormWithGlobalNormalization with empty inputs until a patch is available.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BIT-TENSORFLOW-2021-29547

CVE-2021-29547

GHSA-4FG4-P75J-W5XJ

PYSEC-2021-184

PYSEC-2021-475

PYSEC-2021-673

Affected Products

Tensorflow

References · 13

• 🔥 https://github.com/tensorflow/tensorflow/security/advisories/GHSA-4fg4-p75j-w5xj · Exploit
• https://github.com/tensorflow/tensorflow/commit/d6ed5bcfe1dcab9e85a4d39931bd18d99018e75b · Patch
• https://osv.dev/vulnerability/GHSA-4fg4-p75j-w5xj · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-184 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-673 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29547 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-tensorflow-2021-29547 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29547 · Security Note
• https://osv.dev/vulnerability/PYSEC-2021-475 · Vendor Advisory
• https://github.com/tensorflow/tensorflow · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-184.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-475.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-673.yaml · Note