CVE-2021-29063 : Security Advisory and Response

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Mpmath v1.0.0 through v1.2.1 when the mpmathify function is called.

Understanding CVE-2021-29063

This section provides insights into the CVE-2021-29063 vulnerability.

What is CVE-2021-29063?

CVE-2021-29063 is a Regular Expression Denial of Service (ReDOS) vulnerability found in Mpmath versions 1.0.0 through 1.2.1 when invoking the mpmathify function.

The Impact of CVE-2021-29063

This vulnerability could allow an attacker to launch a denial of service (DoS) attack by exploiting the inefficiency of regular expressions in the affected versions of Mpmath.

Technical Details of CVE-2021-29063

In this section, we delve into the technical aspects of CVE-2021-29063.

Vulnerability Description

The vulnerability arises when the mpmathify function is utilized in Mpmath versions 1.0.0 through 1.2.1, resulting in a ReDOS attack vector.

Affected Systems and Versions

All versions of Mpmath from 1.0.0 to 1.2.1 are affected by CVE-2021-29063.

Exploitation Mechanism

Exploiting this vulnerability involves triggering the mpmathify function in the affected versions of Mpmath, leading to a ReDOS attack.

Mitigation and Prevention

This section outlines the measures to mitigate and prevent exploits related to CVE-2021-29063.

Immediate Steps to Take

Users are advised to update to Mpmath version 1.3.0 or newer, where the vulnerability has been addressed and patched.

Long-Term Security Practices

Implementing secure coding practices, such as thorough input validation and efficient regular expressions, can help prevent ReDOS vulnerabilities in software projects.

Patching and Updates

Regularly check for updates and security advisories from Mpmath to apply patches promptly and maintain a secure software environment.