CVE-2021-40896 Explained : Impact and Mitigation

A Regular Expression Denial of Service (ReDOS) vulnerability was found in that-value v0.1.3 when validating crafted invalid emails.

Understanding CVE-2021-40896

A detailed insight into the ReDOS vulnerability found in that-value v0.1.3.

What is CVE-2021-40896?

The CVE-2021-40896 is a ReDOS vulnerability discovered in that-value v0.1.3 during the validation of crafted invalid emails.

The Impact of CVE-2021-40896

The vulnerability could potentially lead to denial of service attacks when processing specially crafted invalid email inputs.

Technical Details of CVE-2021-40896

Exploring the technical aspects of the CVE-2021-40896 vulnerability.

Vulnerability Description

Type: Regular Expression Denial of Service (ReDOS)
Affected Version: v0.1.3
Validation Trigger: Crafted invalid emails

Affected Systems and Versions

Affected Product: N/A
Affected Version: v0.1.3

Exploitation Mechanism

The vulnerability can be exploited by submitting specially crafted invalid email inputs, triggering the ReDOS issue.

Mitigation and Prevention

Understanding how to mitigate and prevent the CVE-2021-40896 vulnerability.

Immediate Steps to Take

Ensure validation processes handle inputs efficiently.
Regularly monitor and update the application for security patches.

Long-Term Security Practices

Implement input validation mechanisms to prevent ReDOS vulnerabilities.
Conduct security reviews and testing to identify similar issues in the future.

Patching and Updates

Apply the latest updates and patches provided by the software vendor.
Consider upgrading to a non-vulnerable version of that-value.