CVE-2022-41908 : Security Advisory and Response

A vulnerability has been identified in TensorFlow that triggers a

CHECK

fail in

tf.raw_ops.PyFunc

when an input

token

that is not a UTF-8 bytestring is used. This CVE has been patched and the fix will be included in TensorFlow 2.11, along with cherry-picking the commit for versions 2.10.1, 2.9.3, and 2.8.4 due to them being affected.

Understanding CVE-2022-41908

This section provides an overview of the vulnerability and its impact.

What is CVE-2022-41908?

The vulnerability in TensorFlow leads to a

CHECK

fail in

tf.raw_ops.PyFunc

when a non-UTF-8 bytestring input

token

is encountered.

The Impact of CVE-2022-41908

The impact of this CVE allows an attacker to trigger a

CHECK

fail, potentially leading to denial of service (DoS) attacks.

Technical Details of CVE-2022-41908

In this section, we delve into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from improper input validation in TensorFlow, specifically in handling non-UTF-8 bytestring input tokens.

Affected Systems and Versions

Vendor: TensorFlow
Product: TensorFlow
Affected Versions:
TensorFlow >= 2.10.0, < 2.10.1
TensorFlow >= 2.9.0, < 2.9.3
TensorFlow < 2.8.4

Exploitation Mechanism

The vulnerability can be exploited by providing a malicious non-UTF-8 bytestring input token to trigger the

CHECK

fail in

tf.raw_ops.PyFunc

.

Mitigation and Prevention

This section outlines steps to mitigate and prevent the exploitation of CVE-2022-41908.

Immediate Steps to Take

Users are advised to update their TensorFlow installations to version 2.11 or apply the patches for versions 2.10.1, 2.9.3, and 2.8.4 to prevent exploitation.

Long-Term Security Practices

Implement proper input validation mechanisms and regularly update TensorFlow to the latest versions to ensure protection against known vulnerabilities.

Patching and Updates

Stay informed about security advisories from TensorFlow and promptly apply patches and updates to secure your environment.