CVE-2021-33653 : Security Advisory and Response

This CVE-2021-33653 impacts openEuler's MindSpore with versions greater than or equal to 0.7.0-beta and less than 1.3.0. The vulnerability arises when the derivation shape operation of the SpaceToBatch operator encounters a parameter block_shape element with a value of 0, leading to a division by 0 exception.

Understanding CVE-2021-33653

CVE-2021-33653 highlights a specific vulnerability in openEuler's MindSpore related to division by 0 exceptions.

What is CVE-2021-33653?

The flaw occurs during the derivation shape operation of the SpaceToBatch operator if a 0 value is present in the parameter block_shape element, causing a division by 0 exception.

The Impact of CVE-2021-33653

This vulnerability could be exploited by an attacker to trigger a division by 0 exception, potentially leading to denial of service or other security issues.

Technical Details of CVE-2021-33653

The technical aspects associated with CVE-2021-33653 include:

Vulnerability Description

The vulnerability arises due to a 0 value in the block_shape element during the derivation shape operation of the SpaceToBatch operator.

Affected Systems and Versions

Systems running openEuler's MindSpore versions >= 0.7.0-beta and < 1.3.0 are affected by this vulnerability.

Exploitation Mechanism

An attacker could exploit this flaw by manipulating the block_shape parameters to trigger a division by 0 exception.

Mitigation and Prevention

To address CVE-2021-33653, consider the following steps:

Immediate Steps to Take

Update to a fixed version of MindSpore that addresses this vulnerability.
Avoid using block_shape parameters with 0 values to prevent the division by 0 exception.

Long-Term Security Practices

Regularly update all software components to stay protected against known vulnerabilities.
Educate developers and users on secure coding practices to prevent similar issues in the future.

Patching and Updates

Refer to the security advisory provided by openEuler for detailed instructions on patching and updating MindSpore to mitigate CVE-2021-33653.