CVE-2021-41227 : Vulnerability Insights and Analysis

TensorFlow is an open source platform for machine learning. In affected versions, the

ImmutableConst

operation in TensorFlow can be tricked into reading arbitrary memory contents.

Understanding CVE-2021-41227

What is CVE-2021-41227?

In TensorFlow versions >= 2.4.4 and < 2.6.1, a vulnerability allows the

ImmutableConst

operation to read arbitrary memory, impacting confidentiality.

The Impact of CVE-2021-41227

Base Score: 6.6 (Medium)
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Technical Details of CVE-2021-41227

Vulnerability Description

The

ImmutableConst

operation in TensorFlow can be exploited to read arbitrary memory contents, potentially compromising sensitive data.

Affected Systems and Versions

TensorFlow >= 2.6.0, < 2.6.1
TensorFlow >= 2.5.0, < 2.5.2
TensorFlow < 2.4.4

Exploitation Mechanism

The vulnerability lies in the

tstring

TensorFlow string class, where the operation lacks support for certain data types, allowing for memory manipulation.

Mitigation and Prevention

Immediate Steps to Take

Update TensorFlow to version 2.7.0 when available
Apply the fix to versions 2.6.1, 2.5.2, and 2.4.4

Long-Term Security Practices

Regularly update software to patch known vulnerabilities
Implement secure coding practices

Patching and Updates

Patch to TensorFlow 2.7.0 includes the fix for this vulnerability