CVE-2021-33458 : Security Advisory and Response

This article discusses the details of CVE-2021-33458, which involves a NULL pointer dereference in find_cc() in yasm version 1.3.0.

Understanding CVE-2021-33458

This section provides insights into the vulnerability and its impact.

What is CVE-2021-33458?

CVE-2021-33458 is an issue discovered in yasm version 1.3.0, specifically a NULL pointer dereference in find_cc() in modules/preprocs/nasm/nasm-pp.c.

The Impact of CVE-2021-33458

The vulnerability in yasm version 1.3.0 can lead to a NULL pointer dereference, potentially resulting in a denial of service or arbitrary code execution.

Technical Details of CVE-2021-33458

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability involves a NULL pointer dereference in the find_cc() function within yasm version 1.3.0's nasm-pp.c file.

Affected Systems and Versions

The issue impacts yasm version 1.3.0.

Exploitation Mechanism

An attacker could exploit this vulnerability by manipulating input to trigger the NULL pointer dereference.

Mitigation and Prevention

This section provides guidance on addressing the CVE-2021-33458 vulnerability.

Immediate Steps to Take

Users are advised to update yasm to a non-vulnerable version and monitor security advisories for patches.

Long-Term Security Practices

Implement secure coding practices, regularly update software, and conduct security testing to prevent similar vulnerabilities.

Patching and Updates

Always apply security patches promptly to mitigate the risk of exploitation.