CVE-2021-33455 : What You Need to Know

An issue was discovered in yasm version 1.3.0 leading to a NULL pointer dereference in do_directive() in modules/preprocs/nasm/nasm-pp.c.

Understanding CVE-2021-33455

This CVE identifies a vulnerability in yasm version 1.3.0 that can result in a NULL pointer dereference in a specific function within the code.

What is CVE-2021-33455?

CVE-2021-33455 refers to a security flaw found in yasm version 1.3.0, affecting the behavior of the do_directive() function in the mentioned file path.

The Impact of CVE-2021-33455

This vulnerability could potentially lead to a denial of service (DoS) situation or possibly remote code execution if exploited by malicious actors.

Technical Details of CVE-2021-33455

The technical details of this CVE include a description of the vulnerability, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability involves a NULL pointer dereference in the do_directive() function located in modules/preprocs/nasm/nasm-pp.c in yasm version 1.3.0.

Affected Systems and Versions

The affected version is specifically yasm version 1.3.0.

Exploitation Mechanism

If successfully exploited, this vulnerability could enable attackers to trigger a NULL pointer dereference, potentially leading to a DoS or remote code execution.

Mitigation and Prevention

To address CVE-2021-33455, it is crucial to take immediate action and implement security measures to mitigate risks and prevent exploitation.

Immediate Steps to Take

Users are advised to update to a patched version of yasm or apply relevant security fixes to prevent potential exploitation.

Long-Term Security Practices

It is recommended to follow secure coding practices, regularly update software components, and conduct security assessments to prevent future vulnerabilities.

Patching and Updates

Stay informed about security patches released by the vendor and promptly apply them to secure your systems and prevent exploits.