PT-2021-21804 · Google · Tensorflow

Yakun Zhang · Published 2021-08-12 · Updated 2024-03-06 · CVE-2021-37685

Positive Technologies (AI Summary)

CVSS v4.0

6.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions TensorFlow versions prior to 2.6.0 TensorFlow versions 2.5.1 and earlier TensorFlow versions 2.4.3 and earlier TensorFlow versions 2.3.4 and earlier

Description The issue is related to TensorFlow's TFLite, where the expand dims.cc file contains a vulnerability allowing the reading of one element outside the bounds of heap-allocated data. This occurs when the axis is a large negative value, causing the check after the if statement to pass and the for loop to read one element before the start of input dims.data. The vulnerability was reported by Yakun Zhang of Baidu Security.

Recommendations For versions prior to 2.6.0, update to TensorFlow 2.6.0 or later. For versions 2.5.1 and earlier, update to TensorFlow 2.5.1 or later. For versions 2.4.3 and earlier, update to TensorFlow 2.4.3 or later. For versions 2.3.4 and earlier, update to TensorFlow 2.3.4 or later. As a temporary workaround, consider restricting the use of the axis parameter in the affected expand dims.cc function until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BIT-TENSORFLOW-2021-37685

CVE-2021-37685

GHSA-C545-C4F9-RF6V

OPENSUSE-SU-2022:10014-1

OPENSUSE-SU-2024:12116-1

PYSEC-2021-307

PYSEC-2021-598

PYSEC-2021-796

Affected Products

Tensorflow

References · 89

• https://github.com/tensorflow/tensorflow/commit/d94ffe08a65400f898241c0374e9edc6fa8ed257 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2022:10014-1 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-796 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-37685 · Security Note
• https://osv.dev/vulnerability/GHSA-c545-c4f9-rf6v · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-307 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-598 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-tensorflow-2021-37685 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-37685 · Vendor Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-c545-c4f9-rf6v · Note
• https://github.com/tensorflow/tensorflow/blob/149562d49faa709ea80df1d99fc41d005b81082a/tensorflow/lite/kernels/expand_dims.cc#L36-L50 · Note
• https://github.com/tensorflow/tensorflow · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-307.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-796.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-598.yaml · Note